UIKit之浅析UIButton

    UIButton *  button =[[UIButton alloc]init];
    button.backgroundColor=[UIColor redColor];
    [button setTitle:@"我是button" forState:UIControlStateNormal];
    button.frame = CGRectMake(, , , ) ;
    [self.view addSubview:button];

可能有时候，想让title不在中间或者靠某一边，现在就举个例子怎么把文字在button的底部。

代码：

 button.contentEdgeInsets = UIEdgeInsetsMake(, , , );

然后看一下 视图是这个样子：

这里边用到

button.contentEdgeInsets = UIEdgeInsetsMake(100, 0, 0, 0);  //UIEdgeInsetsMake(距离top的距离, 距离left的距离, 距离botton的距离, 距离right的距离)

//设置 button的内容的便宜量

@property(nonatomic)          UIEdgeInsets contentEdgeInsets UI_APPEARANCE_SELECTOR; // 这是内容的偏移量
@property(nonatomic)          UIEdgeInsets titleEdgeInsets;                // title的偏移量
@property(nonatomic)          BOOL         reversesTitleShadowWhenHighlighted; // default is NO. if YES, shadow reverses to shift between engrave and emboss appearance
@property(nonatomic)          UIEdgeInsets imageEdgeInsets;                // image的偏移量
@property(nonatomic)          BOOL         adjustsImageWhenHighlighted;    // default is YES. if YES, image is drawn darker when highlighted(pressed)当高亮的时候if yes 图片自适应

 @property(nonatomic) BOOL adjustsImageWhenDisabled; // default is YES. if YES, image is drawn lighter when disabled
 @property(nonatomic) BOOL showsTouchWhenHighlighted; // 当高亮的时候if yes 图片自适应 
@property(nonatomic,retain) UIColor *tintColor NS_AVAILABLE_IOS(5_0); //高亮颜色

 @property(nonatomic,readonly) UIButtonType buttonType; //button的类型

[button setTitleShadowColor:[UIColor redColor] forState:UIControlStateNormal];

//设置文字的边框颜色

不太明显，效果还是有的。

typedef NS_ENUM(NSInteger, UIButtonType) {
    UIButtonTypeCustom = ,                         // no button type
    UIButtonTypeSystem NS_ENUM_AVAILABLE_IOS(7_0),  // standard system button

    UIButtonTypeDetailDisclosure,
    UIButtonTypeInfoLight,
    UIButtonTypeInfoDark, //
    UIButtonTypeContactAdd,  //按钮上面是哥加号

    UIButtonTypeRoundedRect = UIButtonTypeSystem,   //系统默认的
};

创建button的另一中写法：

button =[UIButton buttonWithType:UIButtonTypeInfoDark];

- (void)setTitle:(NSString *)title forState:(UIControlState)state;                     // 设置button的title
- (void)setTitleColor:(UIColor *)color forState:(UIControlState)state UI_APPEARANCE_SELECTOR; // 设置buttontitle的颜色
- (void)setTitleShadowColor:(UIColor *)color forState:(UIControlState)state UI_APPEARANCE_SELECTOR; // default is nil. use 50% black设置title的字体的阴影颜色
- (void)setImage:(UIImage *)image forState:(UIControlState)state;                      // default is nil. should be same size if different for different states 设置button的image  图片 大小是图片的真实大小
- (void)setBackgroundImage:(UIImage *)image forState:(UIControlState)state UI_APPEARANCE_SELECTOR; // default is nil 设置图片的背景 image会铺满button
- (void)setAttributedTitle:(NSAttributedString *)title forState:(UIControlState)state NS_AVAILABLE_IOS(6_0); // default is nil. title is assumed to be single line  设置 自定义的字符串为button的title

- (NSString *)titleForState:(UIControlState)state;          //  获取某个状态的title
- (UIColor *)titleColorForState:(UIControlState)state;      //获取某个状态的title的字体颜色
- (UIColor *)titleShadowColorForState:(UIControlState)state; //获得某个状态的阴影颜色
- (UIImage *)imageForState:(UIControlState)state;             //获得某个状态的image
- (UIImage *)backgroundImageForState:(UIControlState)state;    //获得背景图片
- (NSAttributedString *)attributedTitleForState:(UIControlState)state NS_AVAILABLE_IOS(6_0); //获得自定义字符串

@property(nonatomic,readonly,retain) NSString *currentTitle;             // normal/highlighted/selected/disabled. can return nil 正常获取当前的title
@property(nonatomic,readonly,retain) UIColor  *currentTitleColor;        // normal/highlighted/selected/disabled. always returns non-nil. default is white(1,1) 获取当前title的颜色
@property(nonatomic,readonly,retain) UIColor  *currentTitleShadowColor;  // normal/highlighted/selected/disabled. default is white(0,0.5).获取当前的阴影颜色
@property(nonatomic,readonly,retain) UIImage  *currentImage;             // normal/highlighted/selected/disabled. can return nil 获取当前的imager
@property(nonatomic,readonly,retain) UIImage  *currentBackgroundImage;   // normal/highlighted/selected/disabled. can return nil  获取当前的背景image
@property(nonatomic,readonly,retain) NSAttributedString *currentAttributedTitle NS_AVAILABLE_IOS(6_0);  // normal/highlighted/selected/disabled. can return nil

// return title and image views. will always create them if necessary. always returns nil for system buttons
@property(nonatomic,readonly,retain) UILabel     *titleLabel NS_AVAILABLE_IOS(3_0);  获取content的view  就是一个lable
@property(nonatomic,readonly,retain) UIImageView *imageView  NS_AVAILABLE_IOS(3_0);  imageView 就是button的image的试图

 (CGRect)backgroundRectForBounds:(CGRect)bounds;
- (CGRect)contentRectForBounds:(CGRect)bounds;
- (CGRect)titleRectForContentRect:(CGRect)contentRect;
- (CGRect)imageRectForContentRect:(CGRect)contentRect;
@end

@interface UIButton(UIButtonDeprecated)

@property(nonatomic,retain) UIFont         *font              NS_DEPRECATED_IOS(2_0, 3_0);//通过这个可以给title设置字体
@property(nonatomic)        NSLineBreakMode lineBreakMode     NS_DEPRECATED_IOS(2_0, 3_0);// 换行模式
@property(nonatomic)        CGSize          titleShadowOffset NS_DEPRECATED_IOS(2_0, 3_0); // title的偏移量

@end