UIButton的常用属性

UIButton的集成关系：
UIControl : UIView : UIResponder : NSObject

1、创建UIButton

    UIButton *btn1 = [UIButton buttonWithType:UIButtonTypeContactAdd];    btn1.frame = CGRectMake(20, 20, 20, 20);    [self.view addSubview:btn1];    /*        UIButtonTypeCustom = 0,        UIButtonTypeSystem,        UIButtonTypeDetailDisclosure,                               见图2        UIButtonTypeInfoLight,        UIButtonTypeInfoDark,        UIButtonTypeContactAdd,                                    见图1        UIButtonTypeRoundedRect  ==  UIButtonTypeSystem,    */

图1
图2

---

2、配置UIButton的title

.titleLabel                        //UIButton中的label，注意字体大小要通过label控件来设置                                   - setTitle:forState:               //设置不同状态下button的title- titleForState:                   //获取不同状态下button的title- setAttributedTitle:forState:     //不同状态下的attributedTitle- attributedTitleForState:- setTitleColor:forState:          //不同状态下title的颜色- titleColorForState:- setTitleShadowColor:forState:    //不同状态下title的阴影，注意要设置label控件下的shadowOffset属性才会出现效果- titleShadowColorForState:.reversesTitleShadowWhenHighlighted//高亮状态下是否保留title的阴影，默认不保留实例：运行效果见图3    UIButton *btn2 = [[UIButton alloc]initWithFrame:CGRectMake(80, 20, 50, 20)];    [btn2 setTitle:@"按钮1" forState:UIControlStateNormal];    [btn2 setTitleColor:[UIColor blueColor] forState:UIControlStateNormal];    [btn2 setTitleShadowColor:[UIColor greenColor] forState:UIControlStateNormal];    [btn2.titleLabel setShadowOffset:CGSizeMake(2.0, 2.0)];    [btn2.titleLabel setFont:[UIFont systemFontOfSize:13]];    [self.view addSubview:btn2];               

图3

---

3、配置UIButton的Image

//按钮按下的状态为“highLight”高亮状态- setBackgroundImage:forState:   //不同状态下的背景图片- backgroundImageForState:- setImage:forState:             //不同状态下的button图片- imageForState:.adjustsImageWhenHighlighted    //按钮按下时 Image颜色是否变暗，默认YES.adjustsImageWhenDisabled       //按钮不能点击时 Image颜色是否变亮，默认YES.showsTouchWhenHighlighted      //.tintColor                      // 实例：    UIButton *btn3 = [[UIButton alloc]initWithFrame:CGRectMake(20, 100, 100, 40)];    [btn3 setEnabled:YES];                                                           //1    [btn3 setImage:[UIImage imageNamed:@"normal"] forState:UIControlStateNormal];    //2    //[btn3 setImage:[UIImage imageNamed:@"highLight"] forState:UIControlStateHighlighted];      //3    [btn3 setAdjustsImageWhenHighlighted:YES];                                       //4    //[btn3 setImage:[UIImage imageNamed:@"disable"] forState:UIControlStateDisabled];    //5    [btn3 setAdjustsImageWhenDisabled:YES];                                          //6    [self.view addSubview:btn3];运行效果：enable为YES        正常状态效果见图4    高亮状态(按下)效果见图5enable为NO         disable效果见图6加上3、5行代码     enable为YES        正常状态效果见图normal    高亮状态(按下)效果见图highLightenable为NO         disable效果见图disable

图“normal ”
图“ highLight ”
图“disable”

图4
图5
图6

---

4、配置UIButton的边缘

.contentEdgeInsets  //内容的边缘，包括title和Image.titleEdgeInsets    //title的边缘.imageEdgeInsets    //Image的边缘注意：1）参数传UIEdgeInsets   UIEdgeInsetsMake(top, left, bottom, right)     2）是距离button中心点来进行移动的，如top == -10 即向上移动10pt                                     top == 10  即想下移动10pt实例：    UIButton *btn4 = [[UIButton alloc]initWithFrame:CGRectMake(20, 150, 100, 40)];    [btn4 setBackgroundColor:[UIColor greenColor]];    [btn4 setEnabled:YES];    [btn4 setImage:[UIImage imageNamed:@"addSDjia"] forState:UIControlStateNormal];    [btn4 setAdjustsImageWhenHighlighted:YES];    [btn4 setTitle:@"添加" forState:UIControlStateNormal];    [btn4 setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];    [btn4.titleLabel setFont:[UIFont boldSystemFontOfSize:15]];    [self.view addSubview:btn4];                                  //运行见图7    [btn4 setImageEdgeInsets:UIEdgeInsetsMake(0, -15, 0, 0)];     //运行见图8    [btn4 setTitleEdgeInsets:UIEdgeInsetsMake(0, 15, 0, 0)];      //运行见图9    [btn4 setContentEdgeInsets:UIEdgeInsetsMake(0, -30, 0, 0)];   //运行见图10

图7
图8
图9
图10

---

5、得到button当前状态

.buttonType             //按钮的类型.currentTitle           //当前title.currentAttributedTitle //当前属性title.currentTitleColor      //当前title颜色.currentTitleShadowColor//当前title阴影颜色.currentImage           //当前Image.currentBackgroundImage //当前背景图.imageView              //只读的imageView