//
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// SGScanView.m
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// SGQRCodeExample
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//
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// Created by kingsic on 2017/8/23.
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// Copyright © 2017年 kingsic All rights reserved.
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//
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#import "SGScanView.h"
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#import "SGScanViewConfigure.h"
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#import "SGWeakProxy.h"
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#import "SGQRCodeLog.h"
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@interface SGScanView ()
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@property (nonatomic, strong) SGScanViewConfigure *configure;
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@property (nonatomic, strong) UIView *contentView;
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@property (nonatomic, strong) UIImageView *scanlineImgView;
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@property (nonatomic, strong) CADisplayLink *link;
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@property (nonatomic, assign) BOOL isTop;
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@property (nonatomic, assign) BOOL isSelected;
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@end
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@implementation SGScanView
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- (void)dealloc {
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if ([SGQRCodeLog sharedQRCodeLog].log) {
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NSLog(@"SGScanView - - dealloc");
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}
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}
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- (instancetype)initWithFrame:(CGRect)frame configure:(SGScanViewConfigure *)configure {
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if (self = [super initWithFrame:frame]) {
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self.configure = configure;
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self.backgroundColor = [UIColor clearColor];
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[self initialization];
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[self addSubview:self.contentView];
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UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tap_action)];
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tap.numberOfTapsRequired = 2;
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[self addGestureRecognizer:tap];
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}
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return self;
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}
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+ (instancetype)scanViewWithFrame:(CGRect)frame configure:(SGScanViewConfigure *)configure {
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return [[SGScanView alloc] initWithFrame:frame configure:configure];
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}
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- (void)initialization {
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CGFloat w = 0.7 * self.frame.size.width;
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CGFloat h = w;
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CGFloat x = 0.5 * (self.frame.size.width - w);
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CGFloat y = 0.5 * (self.frame.size.height - h);
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_borderFrame = CGRectMake(x, y, w, h);
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_scanFrame = CGRectMake(x, y, w, h);
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self.isTop = YES;
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}
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- (UIView *)contentView {
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if (!_contentView) {
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CGFloat x = _scanFrame.origin.x;
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CGFloat y = _scanFrame.origin.y;
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CGFloat w = _scanFrame.size.width;
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CGFloat h = _scanFrame.size.height;
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_contentView = [[UIView alloc] initWithFrame:CGRectMake(x, y, w, h)];
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_contentView.backgroundColor = [UIColor clearColor];
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_contentView.clipsToBounds = YES;
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}
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return _contentView;
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}
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- (UIImageView *)scanlineImgView {
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if (!_scanlineImgView) {
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_scanlineImgView = [[UIImageView alloc] init];
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/// 静态库 url 的获取
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NSURL *url = [[NSBundle mainBundle] URLForResource:@"SGQRCode" withExtension:@"bundle"];
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if (!url) {
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/// 动态库 url 的获取
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url = [[NSBundle bundleForClass:[self class]] URLForResource:@"SGQRCode" withExtension:@"bundle"];
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}
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NSBundle *bundle = [NSBundle bundleWithURL:url];
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UIImage *image = [UIImage imageNamed:self.configure.scanline inBundle:bundle compatibleWithTraitCollection:nil];
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if (!image) {
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image = [UIImage imageNamed:self.configure.scanline];
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}
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_scanlineImgView.image = image;
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if (image) {
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[self updateScanLineFrame];
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}
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}
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return _scanlineImgView;
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}
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- (void)tap_action {
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if (self.isSelected) {
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self.isSelected = NO;
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} else {
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self.isSelected = YES;
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}
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if (self.doubleTapBlock) {
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self.doubleTapBlock(self.isSelected);
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}
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}
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- (void)drawRect:(CGRect)rect {
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[super drawRect:rect];
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if (self.configure.isShowBorder == NO) {
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return;
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}
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/// 边框 frame
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CGFloat borderW = self.borderFrame.size.width;
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CGFloat borderH = self.borderFrame.size.height;
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CGFloat borderX = self.borderFrame.origin.x;
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CGFloat borderY = self.borderFrame.origin.y;
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CGFloat borderLineW = self.configure.borderWidth;
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/// 空白区域设置
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[self.configure.color setFill];
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UIRectFill(rect);
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// 获取上下文，并设置混合模式 -> kCGBlendModeDestinationOut
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CGContextRef context = UIGraphicsGetCurrentContext();
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CGContextSetBlendMode(context, kCGBlendModeDestinationOut);
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// 设置空白区
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UIBezierPath *bezierPath = [UIBezierPath bezierPathWithRect:CGRectMake(borderX + 0.5 * borderLineW, borderY + 0.5 *borderLineW, borderW - borderLineW, borderH - borderLineW)];
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[bezierPath fill];
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// 执行混合模式
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CGContextSetBlendMode(context, kCGBlendModeNormal);
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/// 边框设置
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UIBezierPath *borderPath = [UIBezierPath bezierPathWithRect:CGRectMake(borderX, borderY, borderW, borderH)];
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borderPath.lineCapStyle = kCGLineCapButt;
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borderPath.lineWidth = borderLineW;
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[self.configure.borderColor set];
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[borderPath stroke];
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CGFloat cornerLength = self.configure.cornerLength;
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CGFloat insideExcess = fabs(0.5 * (self.configure.cornerWidth - borderLineW));
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CGFloat outsideExcess = 0.5 * (borderLineW + self.configure.cornerWidth);
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/// 左上角小图标
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[self leftTop:borderX borderY:borderY cornerLength:cornerLength insideExcess:insideExcess outsideExcess:outsideExcess];
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/// 左下角小图标
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[self leftBottom:borderX borderY:borderY borderH:borderH cornerLength:cornerLength insideExcess:insideExcess outsideExcess:outsideExcess];
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/// 右上角小图标
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[self rightTop:borderX borderY:borderY borderW:borderW cornerLength:cornerLength insideExcess:insideExcess outsideExcess:outsideExcess];
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/// 右下角小图标
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[self rightBottom:borderX borderY:borderY borderW:borderW borderH:borderH cornerLength:cornerLength insideExcess:insideExcess outsideExcess:outsideExcess];
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}
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- (void)leftTop:(CGFloat)borderX borderY:(CGFloat)borderY cornerLength:(CGFloat)cornerLength insideExcess:(CGFloat) insideExcess outsideExcess:(CGFloat)outsideExcess {
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UIBezierPath *leftTopPath = [UIBezierPath bezierPath];
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leftTopPath.lineWidth = self.configure.cornerWidth;
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[self.configure.cornerColor set];
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if (self.configure.cornerLocation == SGCornerLoactionInside) {
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[leftTopPath moveToPoint:CGPointMake(borderX + insideExcess, borderY + cornerLength + insideExcess)];
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[leftTopPath addLineToPoint:CGPointMake(borderX + insideExcess, borderY + insideExcess)];
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[leftTopPath addLineToPoint:CGPointMake(borderX + cornerLength + insideExcess, borderY + insideExcess)];
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} else if (self.configure.cornerLocation == SGCornerLoactionOutside) {
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[leftTopPath moveToPoint:CGPointMake(borderX - outsideExcess, borderY + cornerLength - outsideExcess)];
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[leftTopPath addLineToPoint:CGPointMake(borderX - outsideExcess, borderY - outsideExcess)];
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[leftTopPath addLineToPoint:CGPointMake(borderX + cornerLength - outsideExcess, borderY - outsideExcess)];
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} else {
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[leftTopPath moveToPoint:CGPointMake(borderX, borderY + cornerLength)];
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[leftTopPath addLineToPoint:CGPointMake(borderX, borderY)];
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[leftTopPath addLineToPoint:CGPointMake(borderX + cornerLength, borderY)];
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}
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[leftTopPath stroke];
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}
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- (void)rightTop:(CGFloat)borderX borderY:(CGFloat)borderY borderW:(CGFloat)borderW cornerLength:(CGFloat)cornerLength insideExcess:(CGFloat) insideExcess outsideExcess:(CGFloat)outsideExcess {
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UIBezierPath *rightTopPath = [UIBezierPath bezierPath];
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rightTopPath.lineWidth = self.configure.cornerWidth;
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[self.configure.cornerColor set];
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if (self.configure.cornerLocation == SGCornerLoactionInside) {
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[rightTopPath moveToPoint:CGPointMake(borderX + borderW - cornerLength - insideExcess, borderY + insideExcess)];
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[rightTopPath addLineToPoint:CGPointMake(borderX + borderW - insideExcess, borderY + insideExcess)];
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[rightTopPath addLineToPoint:CGPointMake(borderX + borderW - insideExcess, borderY + cornerLength + insideExcess)];
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} else if (self.configure.cornerLocation == SGCornerLoactionOutside) {
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[rightTopPath moveToPoint:CGPointMake(borderX + borderW - cornerLength + outsideExcess, borderY - outsideExcess)];
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[rightTopPath addLineToPoint:CGPointMake(borderX + borderW + outsideExcess, borderY - outsideExcess)];
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[rightTopPath addLineToPoint:CGPointMake(borderX + borderW + outsideExcess, borderY + cornerLength - outsideExcess)];
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} else {
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[rightTopPath moveToPoint:CGPointMake(borderX + borderW - cornerLength, borderY)];
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[rightTopPath addLineToPoint:CGPointMake(borderX + borderW, borderY)];
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[rightTopPath addLineToPoint:CGPointMake(borderX + borderW, borderY + cornerLength)];
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}
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[rightTopPath stroke];
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}
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- (void)leftBottom:(CGFloat)borderX borderY:(CGFloat)borderY borderH:(CGFloat)borderH cornerLength:(CGFloat)cornerLength insideExcess:(CGFloat) insideExcess outsideExcess:(CGFloat)outsideExcess {
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UIBezierPath *leftBottomPath = [UIBezierPath bezierPath];
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leftBottomPath.lineWidth = self.configure.cornerWidth;
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[self.configure.cornerColor set];
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if (self.configure.cornerLocation == SGCornerLoactionInside) {
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[leftBottomPath moveToPoint:CGPointMake(borderX + cornerLength + insideExcess, borderY + borderH - insideExcess)];
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[leftBottomPath addLineToPoint:CGPointMake(borderX + insideExcess, borderY + borderH - insideExcess)];
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[leftBottomPath addLineToPoint:CGPointMake(borderX + insideExcess, borderY + borderH - cornerLength - insideExcess)];
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} else if (self.configure.cornerLocation == SGCornerLoactionOutside) {
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[leftBottomPath moveToPoint:CGPointMake(borderX + cornerLength - outsideExcess, borderY + borderH + outsideExcess)];
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[leftBottomPath addLineToPoint:CGPointMake(borderX - outsideExcess, borderY + borderH + outsideExcess)];
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[leftBottomPath addLineToPoint:CGPointMake(borderX - outsideExcess, borderY + borderH - cornerLength + outsideExcess)];
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} else {
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[leftBottomPath moveToPoint:CGPointMake(borderX + cornerLength, borderY + borderH)];
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[leftBottomPath addLineToPoint:CGPointMake(borderX, borderY + borderH)];
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[leftBottomPath addLineToPoint:CGPointMake(borderX, borderY + borderH - cornerLength)];
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}
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[leftBottomPath stroke];
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}
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- (void)rightBottom:(CGFloat)borderX borderY:(CGFloat)borderY borderW:(CGFloat)borderW borderH:(CGFloat)borderH cornerLength:(CGFloat)cornerLength insideExcess:(CGFloat) insideExcess outsideExcess:(CGFloat)outsideExcess {
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UIBezierPath *rightBottomPath = [UIBezierPath bezierPath];
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rightBottomPath.lineWidth = self.configure.cornerWidth;
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[self.configure.cornerColor set];
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if (self.configure.cornerLocation == SGCornerLoactionInside) {
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[rightBottomPath moveToPoint:CGPointMake(borderX + borderW - insideExcess, borderY + borderH - cornerLength - insideExcess)];
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[rightBottomPath addLineToPoint:CGPointMake(borderX + borderW - insideExcess, borderY + borderH - insideExcess)];
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[rightBottomPath addLineToPoint:CGPointMake(borderX + borderW - cornerLength - insideExcess, borderY + borderH - insideExcess)];
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} else if (self.configure.cornerLocation == SGCornerLoactionOutside) {
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[rightBottomPath moveToPoint:CGPointMake(borderX + borderW + outsideExcess, borderY + borderH - cornerLength + outsideExcess)];
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[rightBottomPath addLineToPoint:CGPointMake(borderX + borderW + outsideExcess, borderY + borderH + outsideExcess)];
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[rightBottomPath addLineToPoint:CGPointMake(borderX + borderW - cornerLength + outsideExcess, borderY + borderH + outsideExcess)];
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} else {
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[rightBottomPath moveToPoint:CGPointMake(borderX + borderW, borderY + borderH - cornerLength)];
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[rightBottomPath addLineToPoint:CGPointMake(borderX + borderW, borderY + borderH)];
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[rightBottomPath addLineToPoint:CGPointMake(borderX + borderW - cornerLength, borderY + borderH)];
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}
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[rightBottomPath stroke];
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}
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- (void)setBorderFrame:(CGRect)borderFrame {
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_borderFrame = borderFrame;
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}
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- (void)setScanFrame:(CGRect)scanFrame {
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_scanFrame = scanFrame;
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self.contentView.frame = scanFrame;
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if (self.scanlineImgView.image) {
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[self updateScanLineFrame];
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}
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}
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- (void)updateScanLineFrame {
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CGFloat w = _contentView.frame.size.width;
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CGFloat h = (w * self.scanlineImgView.image.size.height) / self.scanlineImgView.image.size.width;
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CGFloat x = 0;
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CGFloat y = self.configure.isFromTop ? -h : 0;
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self.scanlineImgView.frame = CGRectMake(x, y, w, h);
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}
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- (void)startScanning {
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if (self.scanlineImgView.image == nil) {
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return;
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}
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[self.contentView addSubview:self.scanlineImgView];
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if (self.link == nil) {
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self.link = [CADisplayLink displayLinkWithTarget:[SGWeakProxy weakProxyWithTarget:self] selector:@selector(updateUI)];
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[self.link addToRunLoop:[NSRunLoop mainRunLoop] forMode:NSRunLoopCommonModes];
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}
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}
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- (void)stopScanning {
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if (self.scanlineImgView.image == nil) {
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return;
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}
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// 此代码防止由于外界逻辑，可能会导致多次停止
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if (self.link == nil) {
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return;
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}
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[self.scanlineImgView removeFromSuperview];
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self.scanlineImgView = nil;
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[self.link invalidate];
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self.link = nil;
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}
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- (void)updateUI {
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CGRect frame = self.scanlineImgView.frame;
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CGFloat contentViewHeight = CGRectGetHeight(self.contentView.frame);
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CGFloat scanlineY = self.scanlineImgView.frame.origin.y + (self.configure.isFromTop ? 0 : self.scanlineImgView.frame.size.height);
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if (self.configure.autoreverses) {
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if (self.isTop) {
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frame.origin.y += self.configure.scanlineStep;
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self.scanlineImgView.frame = frame;
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if (contentViewHeight <= scanlineY) {
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self.isTop = NO;
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}
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} else {
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frame.origin.y -= self.configure.scanlineStep;
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self.scanlineImgView.frame = frame;
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if (scanlineY <= self.scanlineImgView.frame.size.height) {
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self.isTop = YES;
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}
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}
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} else {
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if (contentViewHeight <= scanlineY) {
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CGFloat scanlineH = self.scanlineImgView.frame.size.height;
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frame.origin.y = -scanlineH + (self.configure.isFromTop ? 0 : scanlineH);
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self.scanlineImgView.frame = frame;
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} else {
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frame.origin.y += self.configure.scanlineStep;
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self.scanlineImgView.frame = frame;
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}
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}
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}
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@end
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