UIButton详解

最新推荐文章于 2016-07-30 14:22:38 发布

原创最新推荐文章于 2016-07-30 14:22:38 发布 · 531 阅读

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CC 4.0 BY-SA版权

本文深入探讨了UIButton的基本属性及其应用，包括定义、设置frame、背景色、状态、填充图片、背景图片、标题和标题颜色、按钮效果、事件处理、内部图片间距和标题间距等。通过实例代码演示，帮助开发者掌握UIButton的使用技巧。

第一、UIButton的定义

  UIButton *button=[[UIButton buttonWithType:(UIButtonType);

能够定义的button类型有以下6种，

 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;

第二、设置frame

button1.frame = CGRectMake(20, 20, 280, 40);
[button setFrame:CGRectMake(20,20,50,50)];

第三、button背景色

button1.backgroundColor = [UIColor clearColor];
[button setBackgroundColor:[UIColor blueColor]];

第四、state状态

forState: 这个参数的作用是定义按钮的文字或图片在何种状态下才会显现

enum {
UIControlStateNormal = 0, 常规状态显现 
 UIControlStateHighlighted = 1 << 0, 高亮状态显现 
 UIControlStateDisabled = 1 << 1, 禁用的状态才会显现
 UIControlStateSelected = 1 << 2, 选中状态 
 UIControlStateApplication = 0x00FF0000, 当应用程序标志时 
 UIControlStateReserved = 0xFF000000 为内部框架预留，可以不管他 
};
@property(nonatomic,getter=isEnabled)BOOL enabled;// default is YES. if NO, ignores touch events and subclasses may draw differently
@property(nonatomic,getter=isSelected)BOOL selected;// default is NO may be used by some subclasses or by application
@property(nonatomic,getter=isHighlighted)BOOL highlighted;

第五、设置button填充图片和背景图片

[buttonsetImage:[UIImageimageNamed:@"checkmarkControllerIcon"]forState:UIControlStateNormal];
[buttonsetBackgroundImage:[UIImageimageNamed:@"checkmarkControllerIcon"]forState:UIControlStateNormal];

第六、设置button标题和标题颜色

[button1 setTitle:@"点击" forState:UIControlStateNormal];
[buttonsetTitleColor:[UIColorredColor]forState:UIControlStateNormal];

第七、设置按钮按下会发光

 button.showsTouchWhenHighlighted=NO;

第八、添加或删除事件处理

[button1 addTarget:self action:@selector(butClick:) forControlEvents:UIControlEventTouchUpInside];
[btn removeTarget:nil action:nil forControlEvents:UIControlEventTouchUpInside];

第九、设置按钮内部图片间距和标题间距

 UIEdgeInsets insets; // 设置按钮内部图片间距
 insets.top = insets.bottom = insets.right = insets.left = 10;
 bt.contentEdgeInsets = insets;
 bt.titleEdgeInsets = insets; // 标题间距