ios基础篇（三）——UIButton的详细介绍

按钮UIButton是ios开发中最常见的控件之一，下面来介绍UIButton的详细内容：

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;

二、设置frame

button.frame = CGRectMake(0, 0, 100, 50);

　[button setFrame:CGRectMake(20,20,50,50)];

三、button背景色

　button1.backgroundColor = [UIColor clearColor];

[button setBackgroundColor:[UIColor blueColor]];

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

　};

五 、设置button填充图片和背景图片

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

　[buttonsetBackgroundImage:[UIImage imageNamed:@"checkmarkControllerIcon"]forState:UIControlStateNormal];

六、设置button标题和标题颜色

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

[buttonsetTitleColor:[UIColorredColor]forState:UIControlStateNormal];

七、设置按钮按下会发光

button.showsTouchWhenHighlighted=NO;

八、添加或删除事件处理

[button  addTarget:self action:@selector(buttonAction:) forControlEvents:UIControlEventTouchUpInside];

　[btn removeTarget:nil action:nil forControlEvents:UIControlEventTouchUpInside];

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

//初始化
    myButton = [[UIButton alloc] initWithFrame:(CGRect){,,,}];
    [self.view addSubview:myButton];
    //背景颜色
    myButton.backgroundColor = [UIColor blueColor];
    //圆角
    myButton.layer.cornerRadius = ;
    myButton.layer.masksToBounds = YES;
    //高亮
    myButton.showsTouchWhenHighlighted = NO;
    //设置图片,状态
    [myButton setImage:[UIImage imageNamed:@"buttonImage"] forState:UIControlStateNormal];
    [myButton setImage:[UIImage imageNamed:@"selectedImage"] forState:UIControlStateHighlighted];
    //添加标题
    [myButton setTitle:@"Button" forState:UIControlStateNormal];
    //标题颜色
    [myButton setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
    //点击事件
    [myButton addTarget:self action:@selector(Action) forControlEvents:UIControlEventTouchUpInside];