ios中屏幕適配

- (void)viewDidLoad
{
    [super viewDidLoad];
    
    // 左上角
    // 固定左邊和上邊,伸縮右邊和下邊
    self.leftTop.autoresizingMask = UIViewAutoresizingFlexibleRightMargin | UIViewAutoresizingFlexibleBottomMargin | UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
    
    // 左下角
    // 固定左邊和下邊,伸縮右邊和上邊
    self.leftBottom.autoresizingMask = UIViewAutoresizingFlexibleRightMargin | UIViewAutoresizingFlexibleTopMargin | UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
    
    // 右上角
    // 固定右邊和上邊,伸縮左邊和下邊
    self.rightTop.autoresizingMask = UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleBottomMargin | UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
    
    // 右下角
    // 固定右邊和下邊,伸縮左邊和上邊
    self.rightBottom.autoresizingMask = UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleTopMargin | UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;
}

 

關於ios的控件的AutoresizingMask屬性  
 個人測試的一些結果
 
setAutoresizingMask控件的自適應
 
 
    UIViewAutoresizingNone                 = 0,
    UIViewAutoresizingFlexibleLeftMargin   = 1 << 0,
    UIViewAutoresizingFlexibleWidth        = 1 << 1,
    UIViewAutoresizingFlexibleRightMargin  = 1 << 2,
    UIViewAutoresizingFlexibleTopMargin    = 1 << 3,
    UIViewAutoresizingFlexibleHeight       = 1 << 4,
    UIViewAutoresizingFlexibleBottomMargin = 1 << 5

UIViewAutoresizingNone

 
UILabel*    label = [[UILabel alloc] initWithFrame:CGRectMake(50, 100, 200, 40)];
 
[label setAutoresizingMask: UIViewAutoresizingNone];  控件相對於俯視圖坐標值不變   
 
CGRectMake(50, 100, 200, 40)

UIViewAutoresizingFlexibleWidth：控件的寬度隨着父視圖的寬度按比例改變    例如

label寬度為 100     屏幕的寬度為320          當屏幕寬度為480時      label寬度  變為  100*480/320
同理  
UIViewAutoresizingFlexibleHeight相同


UIViewAutoresizingFlexibleLeftMargin  到屏幕左邊的距離隨着父視圖的寬度按比例改變  

例如    
CGRectMake(50, 100, 200, 40)];   
50     屏幕的寬度為320          當屏幕寬度為480時      label寬度  變為  50*480/320
控件變為    
CGRectMake(75, 100, 200, 40)];  

UIViewAutoresizingFlexibleRightMargin
UIViewAutoresizingFlexibleTopMargin
UIViewAutoresizingFlexibleBottomMargin