設置一個View的背景圖片的集中方法

控制器view的背景圖片的方法, 四種：

1.直接在控制器view上添加一個imageView大小設置的和view同樣

    UIImageView *beijingimage = [UIImageView alloc]initWithImage:[UIImage imageNamed:@"beijing"];

    beijingimage.frame = self.view.frame;

   [self.view addSubview:beijingimage];

 

2.重寫控制器view, 直接drawRect畫在上面

UIGraphicsBeginImageContextWithOptions(self.view.bounds.size, NO, 0);

    UIImage * image = [UIImage imageNamed:@"beijing"];

    [image drawAsPatternInRect:self.view.bounds];

 

 

3.把image轉換成UIColor對象, 再經過設置背景顏色設置

    self.view.backgroundColor = [UIColor colorWithPatternImage:@"beijing"];

 

4.設置layer.contents, 直接設置圖片內容

self.view.layer.contents =[UIImage imageNamed:@"beijing"];