iOS控件之UIButton

按钮控件  UIButton  

一，作用：响应用户的点击事件

 二，常用属性

// 设置指定状态对应的标题文本

- (void)setTitle:(NSString *)title forState:(UIControlState)state;

// 设置指定状态对应的标题颜色

- (void)setTitleColor:(UIColor *)color forState:(UIControlState)state;

// 设置指定状态对应的显示图片

- (void)setImage:(UIImage *)image forState:(UIControlState)state;

// 设置指定状态对应的背景图片

- (void)setBackgroundImage:(UIImage *)image forState:(UIControlState)state;

// 为按钮添加事件

- (void)addTarget:(id)target action:(SEL)action forControlEvents:(UIControlEvents)controlEvents;

三，UIButton的状态

UIControlStateNormal  // 正常状态

UIControlStateHighlighted// 高亮状态

UIControlStateDisabled// 禁用状态

UIControlStateSelected// 选中状态

四，UIButtonDemo

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];
self.window.backgroundColor = [UIColor whiteColor];

// 构造方法
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
/*
// 禁用按钮
button.enabled = NO;
// 按钮选中
button.selected = YES;
// 设置标题，状态正常
[button setTitle:@"normal" forState:UIControlStateNormal];
// 设置标题，状态高亮
[button setTitle:@"highlighted" forState:UIControlStateHighlighted];
// 设置标题，状态禁用
[button setTitle:@"disabled" forState:UIControlStateDisabled];
// 设置标题，状态选中
[button setTitle:@"selected" forState:UIControlStateSelected];
// 设置title的颜色
[button setTitleColor:[UIColor redColor] forState:UIControlStateNormal];
*/

// 设置背景图片
[button setBackgroundImage:[UIImage imageNamed:@"love_normal"] forState:UIControlStateNormal];
[button setBackgroundImage:[UIImage imageNamed:@"love_select"] forState:UIControlStateHighlighted];
[button setBackgroundImage:[UIImage imageNamed:@"love_select"] forState:UIControlStateSelected];

// 设置图片
// [button setImage:[UIImage imageNamed:@"love_normal"] forState:UIControlStateNormal];
// [button setImage:[UIImage imageNamed:@"love_select"] forState:UIControlStateSelected];

// 用户在控件内按下抬起时
[button addTarget:self action:@selector(touchUpInside:) forControlEvents:UIControlEventTouchUpInside];
// 用户按下时
[button addTarget:self action:@selector(down) forControlEvents:UIControlEventTouchDown];
// 用户按下时
[button addTarget:self action:@selector(outside) forControlEvents:UIControlEventTouchUpOutside];
// 记录用户多次按下
[button addTarget:self action:@selector(repeat) forControlEvents:UIControlEventTouchDownRepeat];
// 用户由内向外
[button addTarget:self action:@selector(dragExit) forControlEvents:UIControlEventTouchDragExit];
// 用户由外向内
[button addTarget:self action:@selector(dragEnter) forControlEvents:UIControlEventTouchDragEnter];
// 事件的取消 如用户刚点击按钮 来电话了
[button addTarget:self action:@selector(cancel) forControlEvents:UIControlEventTouchCancel];

// 设置frame，与按钮的类型有关
button.frame = CGRectMake(90, 100, 41, 30);
[self.window addSubview:button];

[self.window makeKeyAndVisible];
return YES;
}

- (void)touchUpInside:(UIButton *)button
{
if (button.selected) {
button.selected = NO;
}else {
button.selected = YES;
}
NSLog(@"touchUpInside");
}

- (void)down
{
NSLog(@"down");
}

- (void)outside
{
NSLog(@"outside");
}

- (void)repeat
{
NSLog(@"repeat");
}

- (void)dragExit
{
NSLog(@"dragExit");
}

- (void)dragEnter
{
NSLog(@"dragEnter");
}

- (void)cancel
{
NSLog(@"cancel");
}