在UIButton的selected设为TRUE后。须要在按钮高亮时,显示自己定义的背景图。
经研究hightLighted和selected这两个状态是能够重叠的,就是button能够同一时候处于selectec和highlighted两个状态下。
从UIControlState的定义也能够看出:
typedef NS_OPTIONS(NSUInteger, UIControlState) {
UIControlStateNormal = 0,
UIControlStateHighlighted = 1 << 0, // used when UIControl isHighlighted is set
UIControlStateDisabled = 1 << 1,
UIControlStateSelected = 1 << 2, // flag usable by app (see below)
UIControlStateApplication = 0x00FF0000, // additional flags available for application use
UIControlStateReserved = 0xFF000000 // flags reserved for internal framework use
};
设置这样的状态重叠情景时的背景图:
[button setBackgroundImage:[UIImage imageNamed:@"seled_highLight.png"] forState:UIControlStateSelected| UIControlStateHighlighted];
经研究hightLighted和selected这两个状态是能够重叠的,就是button能够同一时候处于selectec和highlighted两个状态下。
从UIControlState的定义也能够看出:
typedef NS_OPTIONS(NSUInteger, UIControlState) {
UIControlStateNormal = 0,
UIControlStateHighlighted = 1 << 0, // used when UIControl isHighlighted is set
UIControlStateDisabled = 1 << 1,
UIControlStateSelected = 1 << 2, // flag usable by app (see below)
UIControlStateApplication = 0x00FF0000, // additional flags available for application use
UIControlStateReserved = 0xFF000000 // flags reserved for internal framework use
};
设置这样的状态重叠情景时的背景图:
[button setBackgroundImage:[UIImage imageNamed:@"seled_highLight.png"] forState:UIControlStateSelected| UIControlStateHighlighted];