如何在ViewController中为UIButton创建事件？

查看此链接以了解iOS视图层次结构的基础知识:iOS视图 入门并了解下图(学分:techrepublic.com):

编程方式:

// Create your button wherever you wish (below is example button)
UIButton *myButton = [UIButton buttonWithType:UIButtonTypeCustom];
myButton.frame = CGRectMake(0.0, 0.0, 320, 450);
[myButton setTitle:@"Yay" forState:UIControlStateNormal];
[myButton addTarget:self action:@selector(didTouchUp:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:myButton];

// This method will be called when touch up is made on the button
- (void)didTouchUp:(UIButton *)sender {
    NSLog(@"Button Pressed!");
}

说明:

[myButton addTarget:self action:@selector(didTouchUp:) forControlEvents:UIControlEventTouchUpInside];

myButton - 您的按钮视图

addTarget - 方法所在的目标

action - 要调用的选择器

forControlEvents - 用户将执行的控制事件以触发此操作

使用故事板:

(A)确保故事板与正确的类对应

(B)将UIButton从对象库拖到故事板中

然后添加到ViewController.h文件:

#import 

@interface ViewController : UIViewController

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

- (IBAction)didTouchUp:(id)sender;

@end

然后添加到ViewController.m文件:

- (IBAction)didTouchUp:(id)sender {
    NSLog(@"Button Pressed!");
}

最后,在UIButton和IBAction之间创建连接:

(A)右键单击按钮视图

(B)将补救动作拖动到故事板上的按钮视图

(C)按didTouchUp:

这是完成这一步骤的基本流程......您可能希望通过阅读以下内容来扩展您的技能:

故事板与IB对比代码

斯坦福大学开发iOS