ios - 链接 UIView 动画？

Question

我正在尝试使图像从坐标 x=80 和 y=249 开始，然后移动到 x=284 和 y=99。然后从那里它会去 x=488 和 y=249。

这就是我得到的，但由于某种原因，图像从 x=284 和 y=99 开始，然后移动到 x=488 和 y=249。我需要帮助来解决这个问题。

    -(void)BallArchR{
        [UIView beginAnimations:nil context:nil];
        [UIView setAnimationDuration: 1.5];
        [UIView setAnimationCurve:UIViewAnimationCurveLinear];
        CGPoint center = [Ball center];
        center.x = 284;
        center.y = 99;
        [Ball setCenter:center];
        [UIView commitAnimations];
        [self BallArchR2];
    }

    -(void)BallArchR2{
        [UIView beginAnimations:nil context:nil];
        [UIView setAnimationDuration: 1.5];
        [UIView setAnimationCurve:UIViewAnimationCurveLinear];
        CGPoint center = [Ball center];
        center.x = 488;
        center.y = 249;
        [Ball setCenter:center];
        [UIView commitAnimations];
    }

Answer 1

因为您直接从 BallArchR 方法调用 BallArchR2 方法。但实际上，在 BallArchR2 方法被调用之前，BallArchR 方法的动画并不完整。因此，在第一个 BallArchR 方法动画完成后调用 BallArchR2 方法。所以你可以试试这个希望它对你有帮助:

-(void)BallArchR{
    [UIView beginAnimations:nil context:nil];
    [UIView setAnimationDuration: 1.5];
    [UIView setAnimationCurve:UIViewAnimationCurveLinear];
    CGPoint center = [Ball center];
    center.x = 284;
    center.y = 99;
    [Ball setCenter:center];
    [UIView commitAnimations];

    dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, 1.55 * NSEC_PER_SEC);
    dispatch_after(popTime, dispatch_get_main_queue(), ^(void){
        [self BallArchR2];
    });
}

-(void)BallArchR2{
    [UIView beginAnimations:nil context:nil];
    [UIView setAnimationDuration: 1.5];
    [UIView setAnimationCurve:UIViewAnimationCurveLinear];
    CGPoint center = [Ball center];
    center.x = 488;
    center.y = 249;
    [Ball setCenter:center];
    [UIView commitAnimations];
}