//
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// EZQRView.m
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// EZOpenSDKDemo
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//
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// Created by DeJohn Dong on 15/10/29.
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// Copyright © 2015年 Ezviz. All rights reserved.
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//
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#import "EZQRView.h"
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@implementation EZQRView
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- (void)awakeFromNib {
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[super awakeFromNib];
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[self setupUI];
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}
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- (void)layoutSubviews {
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[super layoutSubviews];
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[self setupUI];
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}
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// Only override drawRect: if you perform custom drawing.
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// An empty implementation adversely affects performance during animation.
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- (void)drawRect:(CGRect)rect {
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//整个二维码扫描界面的颜色
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CGSize screenSize = self.bounds.size;
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CGRect screenDrawRect = CGRectMake(0, 0, screenSize.width,screenSize.height);
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//中间清空的矩形框
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CGRect clearDrawRect = CGRectMake(screenDrawRect.size.width / 2 - self.clearSize.width / 2,
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screenDrawRect.size.height / 3 - self.clearSize.height / 2,
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self.clearSize.width,self.clearSize.height);
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CGContextRef ctx = UIGraphicsGetCurrentContext();
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[self addScreenFillRect:ctx rect:screenDrawRect];
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[self addCenterClearRect:ctx rect:clearDrawRect];
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[self addCornerLineWithContext:ctx rect:clearDrawRect];
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}
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#pragma mark - Custom Methods
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- (void)setupUI
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{
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}
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#pragma mark - Draw Methods
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- (void)addScreenFillRect:(CGContextRef)ctx rect:(CGRect)rect
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{
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CGContextSetRGBFillColor(ctx, 40/255.0, 40/255.0, 40/255.0, 0.5);
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CGContextFillRect(ctx, rect); //draw the transparent layer
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}
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- (void)addCenterClearRect:(CGContextRef)ctx rect:(CGRect)rect {
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CGContextClearRect(ctx, rect); //clear the center rect of the layer
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}
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- (void)addCornerLineWithContext:(CGContextRef)ctx rect:(CGRect)rect{
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//画四个边角
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CGContextSetLineWidth(ctx, 3);
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CGContextSetRGBStrokeColor(ctx, 255/255.0, 84/255.0, 0/255.0, 1);//绿色
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//左上角
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CGPoint pointsTopLeftA[] = {
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CGPointMake(rect.origin.x + 0.7, rect.origin.y),
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CGPointMake(rect.origin.x + 0.7 , rect.origin.y + 15)
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};
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CGPoint pointsTopLeftB[] = {
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CGPointMake(rect.origin.x, rect.origin.y + 0.7),
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CGPointMake(rect.origin.x + 15, rect.origin.y + 0.7)
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};
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[self addLine:pointsTopLeftA pointB:pointsTopLeftB ctx:ctx];
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//左下角
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CGPoint pointsBottomLeftA[] = {
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CGPointMake(rect.origin.x + 0.7, rect.origin.y + rect.size.height - 15),
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CGPointMake(rect.origin.x + 0.7, rect.origin.y + rect.size.height)
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};
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CGPoint pointsBottomLeftB[] = {
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CGPointMake(rect.origin.x , rect.origin.y + rect.size.height - 0.7),
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CGPointMake(rect.origin.x + 15.7, rect.origin.y + rect.size.height - 0.7)
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};
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[self addLine:pointsBottomLeftA pointB:pointsBottomLeftB ctx:ctx];
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//右上角
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CGPoint pointsTopRightA[] = {
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CGPointMake(rect.origin.x + rect.size.width - 15, rect.origin.y + 0.7),
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CGPointMake(rect.origin.x + rect.size.width, rect.origin.y + 0.7 )
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};
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CGPoint pointsTopRightB[] = {
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CGPointMake(rect.origin.x + rect.size.width - 0.7, rect.origin.y),
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CGPointMake(rect.origin.x + rect.size.width - 0.7, rect.origin.y + 15.7 )
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};
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[self addLine:pointsTopRightA pointB:pointsTopRightB ctx:ctx];
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//右下角
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CGPoint pointsBottomRightA[] = {
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CGPointMake(rect.origin.x + rect.size.width - 0.7, rect.origin.y +rect.size.height - 15),
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CGPointMake(rect.origin.x - 0.7 + rect.size.width, rect.origin.y +rect.size.height)
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};
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CGPoint pointsBottomRightB[] = {
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CGPointMake(rect.origin.x + rect.size.width - 15, rect.origin.y + rect.size.height - 0.7),
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CGPointMake(rect.origin.x + rect.size.width, rect.origin.y + rect.size.height - 0.7)
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};
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[self addLine:pointsBottomRightA pointB:pointsBottomRightB ctx:ctx];
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CGContextStrokePath(ctx);
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}
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- (void)addLine:(CGPoint[])pointA pointB:(CGPoint[])pointB ctx:(CGContextRef)ctx {
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CGContextAddLines(ctx, pointA, 2);
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CGContextAddLines(ctx, pointB, 2);
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}
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@end
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