iOS 动态添加按钮

单击一个已有的按钮后自动创建一个新的按钮，并为新按钮添加事件，使得单击时弹出提示框。

在viewcontroller.h中添加

@property (weak,
nonatomic) IBOutlet
UIButton *addbutton;

为这个按钮添加响应事件addbutton

在viewcontroller.m中添加

- (IBAction)addButton:(id)sender {

//动态添加一个按钮

CGRect frame = CGRectMake(0,
0, 300,
50);

UIButton *button = [UIButton
buttonWithType:UIButtonTypeRoundedRect];

button.frame = frame;

[button setTitle:@"新添加的动态按钮"
forState: UIControlStateNormal];

button.backgroundColor = [UIColor redColor];

button.tag =
2000;

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

[self.view
addSubview:button];

}

//这个是新按钮的响应函数

-(IBAction) buttonClicked:(id)sender {

UIAlertView *alert = [[UIAlertView
alloc]
initWithTitle:@"提示"

message:@"单击了动态按钮！"

delegate:self

cancelButtonTitle:@"确定"

otherButtonTitles:nil];

[alert
show];

}