on Mac or iPhone? Frustrated because NSString stringByAddingPercentEscapesUsingEncoding encodes non-URL characters but leaves the reserved characters (like slash / and ampersand &) alone? "Appare

 可以用UIScrollView（其实任何一个UIVew都可以）来滚动，然后改变它的contentOffset，把这个改动提交到Animation里，就会得到一个平滑滚动的效果，而不是一定一定的往前跑，类似的代码如下： [UIView beginAnimations:@"testAnimation" context:nil];[UIView setAnimationDuration:2