iOS使用帧动画

//NSArray *_arrayImages4Connecting; 几张图片按顺序切换- (void)startAnimation4Connection {   NSArray * _arrayImages4Connecting = [NSArray arrayWithObjects:                               [UIImage imageNamed:@"dot_01.png"],                               [UIImage imageNamed:@"dot_02.png"],                               [UIImage imageNamed:@"dot_03.png"],                               nil];    [self.imageView_connecting setAnimationImages:_arrayImages4Connecting];    [self.imageView_connecting setAnimationRepeatCount:10000];    [self.imageView_connecting setAnimationDuration:1.0f];    [self.imageView_connecting startAnimating];}- (void)stopAnimation4Connection {    [self.imageView_connecting.layer removeAllAnimations];}