如何自定義矩形進度條？

Question

我想定製一個帶有UIKIT的矩形進度條，像吸引人的圖像。有沒有任何源代碼？ Cocos2d與CCProgressTimer具有相同的屬性，但我無法找到任何UIKIT源代碼。

Answer 1

創建ShapedLayer

CAShapeLayer *layer = [CAShapeLayer layer]; 
[layer setStrokeColor:[UIColor greenColor].CGColor]; 
[layer setLineWidth:10.0f]; 

[layer setFillColor:[UIColor clearColor].CGColor]; 

要動畫

UIBezierPath *path = [UIBezierPath bezierPathWithRoundedRect:CGRectMake(10, 10, 300, 200) cornerRadius:10.0f]; 
layer.path = path.CGPath; 

CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:@"strokeEnd"]; 
animation.fromValue = [NSNumber numberWithFloat:0.0f]; 
animation.toValue = [NSNumber numberWithFloat:1.0f]; 

定義動畫持續時間

animation.duration = 4.0f; 
[layer addAnimation:animation forKey:@"myStroke"]; 

動畫添加到圖層創建radious一個矩形，在其上想要顯示

[self.view.layer addSublayer:layer];