我有一个UIImageView添加为子视图。我正在尝试使用transform对其进行动画处理。动画没有，但是imageview是正确缩放的，只是不能自动反转。难道我做错了什么？
UIImageView * iv_tap = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"gesture_tap"]];
iv_tap.center = point;
iv_tap.tag = 779;
iv_tap.hidden = true;
[UIView animateWithDuration:2.0
delay:.05
options: UIViewAnimationOptionAutoreverse | UIViewAnimationOptionRepeat | UIViewAnimationOptionCurveLinear
animations:^{
iv_tap.transform = CGAffineTransformScale(CGAffineTransformIdentity, 1.8, 1.8);
}
completion:NULL];
[self addSubview:iv_tap];
最佳答案
将imageView添加到view之后，需要制作动画。如果您在addSubView之前执行动画，此时图像视图不在层次结构中，并且看不到任何动画。
UIImageView * iv_tap = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"gesture_tap"]];
[self.view addSubview:iv_tap]; //this could be self in your case
iv_tap.tag = 779;
[UIView animateWithDuration:2.0 delay:0.05 options:UIViewAnimationOptionCurveEaseOut animations:^{
iv_tap.center=self.view.center;
iv_tap.transform = CGAffineTransformScale(CGAffineTransformIdentity, 1.8, 1.8);
[self.view layoutIfNeeded]; //this could be self in your case
} completion:^(BOOL finished) {
//do your stuff when animation is done
}];
如果要子类化UIView，则甚至可以将其放在drawRect方法中:
UIImageView * iv_tap = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"gesture_tap"]];
[self addSubview:iv_tap];
iv_tap.tag = 779;
[UIView animateWithDuration:2.0 delay:0.05 options:UIViewAnimationOptionCurveEaseOut animations:^{
iv_tap.center=self.center;
iv_tap.transform = CGAffineTransformScale(CGAffineTransformIdentity, 1.8, 1.8);
[self layoutIfNeeded];
} completion:^(BOOL finished) {
//do your stuff when animation is done
}];
关于ios - 动画无法在UIImageView上运行，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/34363248/