关于UIView的autoresizingMask属性的研究
UIView中有个属性是autoresizingMask,该属性是用来控制控件的自适应。
UIViewAutoresizingNone = 0,
UIViewAutoresizingFlexibleLeftMargin = 1 << 0,
UIViewAutoresizingFlexibleWidth = 1 << 1,
UIViewAutoresizingFlexibleRightMargin = 1 << 2,
UIViewAutoresizingFlexibleTopMargin = 1 << 3,
UIViewAutoresizingFlexibleHeight = 1 << 4,
UIViewAutoresizingFlexibleBottomMargin = 1 << 5
UIViewAutoresizingNone:控件相对于父视图坐标值不变;
UIViewAutoresizingFlexibleWidth:控件的宽度随着父视图的宽度按比例改变;
例如:label宽度为100,屏幕的宽度为320。当屏幕宽度为480时,label宽度变为100*480/320
UIViewAutoresizingFlexibleHeight:与UIViewAutoresizingFlexibleWidth相同
UIViewAutoresizingFlexibleLeftMargin:到屏幕左边的距离随着父视图的宽度按比例改变;
例如:CGRectMake(50, 100, 200, 40)]; 当屏幕的宽度为320,x为50;当屏幕宽度为480时,labelx坐标变为 50*480/320。控件坐标变为 CGRectMake(75, 100, 200, 40)];
UIViewAutoresizingFlexibleRightMargin、 UIViewAutoresizingFlexibleTopMargin、 UIViewAutoresizingFlexibleBottomMargin与 UIViewAutoresizingFlexibleLeftMargin类似