模拟android 的 图形 锁屏
16lz
2021-12-12
模仿android 的滑动解锁屏幕：其实思想就是画线然后记住每个点：下面是关键的代码：
- (void)drawRect:(CGRect)rect{ if (!_trackPointValue) return; CGContextRef context = UIGraphicsGetCurrentContext(); CGContextSetLineWidth(context, 10.0); CGColorSpaceRef colorspace = CGColorSpaceCreateDeviceRGB(); CGFloat components[] = {0.5, 0.5, 0.5, 0.8}; CGColorRef color = CGColorCreate(colorspace, components); CGContextSetStrokeColorWithColor(context, color); CGPoint from; UIView *lastDot; for (UIView *dotView in _dotViews) { from = dotView.center; NSLog(@"drwaing dotview: %@", dotView); NSLog(@"\tdrawing from: %f, %f", from.x, from.y); if (!lastDot) CGContextMoveToPoint(context, from.x, from.y); else CGContextAddLineToPoint(context, from.x, from.y); lastDot = dotView; } CGPoint pt = [_trackPointValue CGPointValue]; NSLog(@"\t to: %f, %f", pt.x, pt.y); CGContextAddLineToPoint(context, pt.x, pt.y); CGContextStrokePath(context); CGColorSpaceRelease(colorspace); CGColorRelease(color); _trackPointValue = nil;} 效果图：
效果图：
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