iOS視訊處理之增加動畫掛件和Image邊框

增加Image邊框.首先Image必須為png格式.空白的地方要是那種透明的,而不是白色. 只需要修改背景Layer.

UIImage* overlayImage=[UIImage ImageNamed:@"frame.png"];
    CALayer *backgroundLayer = [CALayer layer];
  [backgroundLayer setContents:(id)[overlayImage CGImage]]; //overlayImage為UIImage物件
    backgroundLayer.frame = CGRectMake(0, 0, naturalSize.width, naturalSize.height);
複製程式碼

增加動畫掛件.這裡需要使用到CABasicAnimation

首先我們依舊要用到ImageLayer

  UIImage *animationImage = [UIImage imageNamed:@"star.png"];;
  CALayer *overlayLayer = [CALayer layer];
  [overlayLayer setContents:(id)[animationImage CGImage]];
  overlayLayer.frame = CGRectMake(size.width/2-64, size.height/2 + 200, 128, 128);
  [overlayLayer setMasksToBounds:YES];

    CABasicAnimation *animation =
    [CABasicAnimation animationWithKeyPath:@"transform.rotation"];
    animation.duration=2.0;
    animation.repeatCount=5;
    animation.autoreverses=YES;
    animation.fromValue=[NSNumber numberWithFloat:0.0];
    animation.toValue=[NSNumber numberWithFloat:(2.0 * M_PI)];
    animation.beginTime = AVCoreAnimationBeginTimeAtZero;
    [overlayLayer addAnimation:animation forKey:@"rotation"];
//然後新增到parentLayer中就好. 動畫完成.關於`CABasicAnimation`.請自行尋找教程
複製程式碼

demo:

https://github.com/sunstrider12/theVideo
複製程式碼