按顺序播放多个动画

Question

我正在尝试执行球爆破效果，以发挥顺序。接二连三。

我做了什么：

我用过的球体爆破效果

UIButton *ballButton = (UIButton *)[cell viewWithTag:10];

ballButton.imageView.animationImages = [[NSArray alloc] initWithObjects:
                                        [UIImage imageNamed:@"1.png"],
                                        [UIImage imageNamed:@"2.png"],
                                        [UIImage imageNamed:@"3.png"],
                                        [UIImage imageNamed:@"4.png"],
                                        nil];
ballButton.imageView.animationDuration = 1;
ballButton.imageView.animationRepeatCount = 1;

代码上的这一行附加到集合视图单元格中的多个按钮。我把这些叫做ballbutton.imageview，像这样启动动画

[UIView animateWithDuration:1 delay:5 options:UIViewAnimationOptionCurveEaseOut animations:^{
        NSIndexPath *path2 = [NSIndexPath indexPathForRow:x inSection:0];
        UICollectionViewCell *cell = [ballContainer cellForItemAtIndexPath:path2];
        UIButton *ballObject = (UIButton *) [cell viewWithTag:10];
        [ballObject.imageView startAnimating];
    } completion:^(BOOL b){
          NSLog(@" here i call next animation of ball blast to execute ");
}];

我嵌套了3个像这样的动画按钮。

Answer 1

这样我就解决了我的问题。最初，我通过调用以下命令来启动动画

        [self startAnim:index];

而不是像这样实现这个StartAnim并解决问题。

-(void)StartAnim :(int)x{

    NSIndexPath *path2 = [NSIndexPath indexPathForRow:x inSection:0];
    UICollectionViewCell *cell = [ballContainer cellForItemAtIndexPath:path2];
    UIButton *ballObject = (UIButton *) [cell viewWithTag:10];
    [ballObject setBackgroundImage:nil forState:UIControlStateNormal];
    ballObject.imageView.image = nil;
    [ballObject.imageView startAnimating];

    double delayInSeconds = 0.15;
    dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, (int64_t)(delayInSeconds * NSEC_PER_SEC));
    dispatch_after(popTime, dispatch_get_main_queue(), ^(void){

        if(x-6>=0){
            [self StartAnim :(x-6)];
        }
    });



}

Answer 2

首先，你为什么不为其他三个人制作一个大动画呢？UIView animateWithDuration:的特点是，它在给它的时间内执行动画块，也就是说，将框架从(200,200)设置为(0,0)将在一秒钟内(在您的情况下)按比例移动。但是UIImageView关于动画的属性是以这样的方式制作的，即动画已经为您完成了。

就我个人而言，我建议使用计时器，就像这样：

NSTimer *timer = [NSTimer scheduledTimerWithTimeInterval:ballObject.imageView.animationDuration
                                                  target:self 
                                                selector:@selector(performNextAnimation:) 
                                                userInfo:nil repeats:NO];
[ballObject.imageView startAnimating];

在performNextAnimation方法中：

- (void) performNextAnimation{
[timer invalidate]; // you have to access the timer you've scheduled with the animation
timer = nil;
/* code for starting the next animation */
}