「兜底」在iPhone上

Question

圖像我想上的UIView顯示的圖像：

1. 顯示空屏幕
2. 慢慢顯露從對底部

任何想法的形象？

Answer 1

事情是這樣的：

UIImageView *img = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"someImage.png"]]; 

CGRect endFrame = img.frame; 
CGRect startFrame = img.frame; 

startFrame.size.height = 0; 
img.frame = startFrame; 

[view addSubview:img]; 

[UIView beginAnimations:nil context:nil]; 
[UIView setAnimationDuration: 0.5]; 

img.frame = endFrame; 

[UIView commitAnimations];