UI控件之－－UIButton

UIButton是UIControl子类，这个类提供了方法来设置标题，图像，按钮等外观属性。通过使用set方法，你可以指定一个不同的外观为每个按钮状态。

// typedef enum {
// UIButtonTypeCustom = 0, 自定义风格
// UIButtonTypeRoundedRect, 圆角矩形
// UIButtonTypeDetailDisclosure, 蓝色小箭头按钮，主要做详细说明用
// UIButtonTypeInfoLight, 亮色感叹号
// UIButtonTypeInfoDark, 暗色感叹号
// UIButtonTypeContactAdd, 十字加号按钮
// } UIButtonType;

+ (id)buttonWithType:(UIButtonType)buttonType;

　　 // contentEdgeInsets : 切掉按钮内部的内容

    // imageEdgeInsets : 切掉按钮内部UIImageView的内容

    // titleEdgeInsets : 切掉按钮内部UILabel的内容

    shareButton.titleEdgeInsets = UIEdgeInsetsMake(0, 10, 0, 0);

UIEdgeInsets contentEdgeInsets; // default is UIEdgeInsetsZero
UIEdgeInsets titleEdgeInsets;                // default is UIEdgeInsetsZero
BOOL         reversesTitleShadowWhenHighlighted; // default is NO. if YES, shadow reverses to shift between engrave and emboss appearance
UIEdgeInsets imageEdgeInsets;                // default is UIEdgeInsetsZero
BOOL         adjustsImageWhenHighlighted;    // default is YES. 默认情况下，当按钮高亮的情况下，图像的颜色会被画深一点，如果这下面的这个属性设置为no，那么可以去掉这个功能
BOOL         adjustsImageWhenDisabled;       // default is YES. 默认情况下，当按钮禁用的时候，图像会被画得深一点，设置NO可以取消设置
BOOL         showsTouchWhenHighlighted;      // default is NO. 设置为yes的状态下，按钮按下会发光
UIColor     *tintColor; // The tintColor is inherited through the superview hierarchy. See UIView for more information.
UIButtonType buttonType;

  

- (void)setTitle:(NSString *)title forState:(UIControlState)state    //设置标题              

- (void)setTitleColor:(UIColor *)color forState:(UIControlState)state   //设置标题颜色

- (void)setTitleShadowColor:(UIColor *)color forState:(UIControlState)state  //设置标题阴影颜色

- (void)setImage:(UIImage *)image forState:(UIControlState)state;            //设置图片

- (void)setBackgroundImage:(UIImage *)image forState:(UIControlState)state    //设置背景图片

- (void)setAttributedTitle:(NSAttributedString *)title forState:(UIControlState)state  // 设置标题 ，标题被设定为单行，，

 

@property(nonatomic,readonly,retain) UILabel     *titleLabel   // 直接设置titleLabel属性不显示，原因是titleLabel的frame默认是0，hidden=yes;

@property(nonatomic,readonly,retain) UIImageView *imageView