Scale 圖片會縮放魄梯。
Aspect 保持比例
UIViewContentModeScaleToFill
縮放 不用保證比例 那就拉伸
UIViewContentModeScaleAspectFit
縮放 又保證比例 那么縮小咯 露出黑邊
UIViewContentModeScaleAspectFill
縮放 又保證比例 那么放大咯 顯示不全
http://www.reibang.com/p/6f51b22ef678
typedef NS_ENUM(NSInteger, UIViewContentMode) {
UIViewContentModeScaleToFill,
UIViewContentModeScaleAspectFit, // contents scaled to fit with fixed aspect. remainder is transparent
UIViewContentModeScaleAspectFill, // contents scaled to fill with fixed aspect. some portion of content may be clipped.
UIViewContentModeRedraw, // redraw on bounds change (calls -setNeedsDisplay)
UIViewContentModeCenter, // contents remain same size. positioned adjusted.
UIViewContentModeTop,
UIViewContentModeBottom,
UIViewContentModeLeft,
UIViewContentModeRight,
UIViewContentModeTopLeft,
UIViewContentModeTopRight,
UIViewContentModeBottomLeft,
UIViewContentModeBottomRight,
};
@property(nonatomic) UIViewContentMode contentMode; // default is UIViewContentModeScaleToFill
視圖的contentMode屬性 默認(rèn)UIViewContentModeScaleToFill
先上些圖
UIViewContentModeScaleToFill.png
UIViewContentModeScaleAspectFit.png
UIViewContentModeScaleAspectFill.png
UIViewContentModeCenter.png
