在iOS视图控制中显示背景图

- (void)viewDidLoad

{

CGRect rect_screen = [[UIScreen mainScreen]bounds];

CGSize winSize = rect_screen.size;

//在视图中显示图片

UIImage * image = [UIImage imageNamed: @"bg.png"];

CGRect imageFrame = CGRectMake(0, 0, winSize.width, winSize.height);

UIImageView *imageView = [[UIImageView alloc] initWithFrame:imageFrame]; //图像视图大小与图片一样大小

imageView.image = [image stretchableImageWithLeftCapWidth:left topCapHeight:top];

[self.view addSubview:imageView];

// 显示按钮

UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];

button.frame = CGRectMake(20, 20, 200, 200);

[button setTitle:@"Client" forState:UIControlStateNormal];

[button addTarget:self action:@selector(buttonClicked:)forControlEvents:UIControlEventTouchUpInside];

[self.view addSubview:button];

[super viewDidLoad];

}