方法一，使用一个UIImageView实例做子视图，并且放最后面
Objective-c代码
- - (void)setBackgroundImage {
- NSLog(@"setting bg image");
- UIImageView *customBackground = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"background.jpg"]];
- self.background = customBackground;
- [customBackground release];
- [self addSubview:background];
- NSLog(@"Added background subview %@", background);
- [self sendSubviewToBack:background];
- }
方法二，Cook Book中提到的方法
Objective-c代码
- - (void)loadView {
- UIImageView *contentView = [[UIImageView alloc] initWithFrame:[[UIScreen mainScreen] applicationFrame]];
- [contentView setImage:[UIImage imageNamed:@"Default.png"]];
- [contentView setUserInteractionEnabled:YES];
- self.view = contentView;
- [contentView release];
- }
方法三，lvyile网友用的一个小技巧，uiView是UIView的实例，而不是UIImageView
Objective-c代码
- uiView.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"Default.png"]];
