以编程方式在iPhone中放大和缩小:如何设置动画速度？

Question

我有一个应用程序,我想动态放大和缩小imageView.

我[scrollView zoomToRect:CGRectMake(x,y,z,k) animated:YES];用来放大但我希望动画更慢......有没有办法设置动画速度？

Answer 1

看到我的另一个答案.您可以将动画持续时间设置为1.0秒.

代替:
cursorView.center = locationOfTouch;

你必须设置:

[UIView beginAnimations:nil context:NULL]
[UIView setAnimationDuration:1.0];
[UIView setAnimationBeginsFromCurrentState:YES];
[UIView setAnimationCurve:UIViewAnimationCurveLinear];

[scrollView zoomToRect:CGRectMake(x,y,z,k) animated:NO]; // NO is necessary!

[UIView commitAnimations];