在事件处理程序中获取UIButton的标题

Question

我创建一个按钮并将标题设置为“单击此处”。当我按下那个按钮时，我想获得那个按钮标题并记录下来。这是我的代码，我哪里错了？

-(void)clicketbutton { 
    UIButton *mybutton = [UIButton buttonWithType:UIButtonTypeCustom]; 
    [mybutton setTitle:@"Click here" forState:UIControlStateNormal]; 
    [mybutton addTarget:self 
     action:@selector(displayvalue:)forControlEvents:UIControlEventTouchUpInside]; 
} 

-(void)displayvalue:(id)sender {  
    UIButton *resultebutton= [UIButton buttonWithType:UIButtonTypeCustom]; 

    resultebutton=sender;// pls clear here.. my question here , it it possible or not. if possible how ? 
    NSLog(@" The buttontitile is %@ ", [resultebutton.Title] // here also. 
} 

Answer 1

你displayvalue：方法应该是这个样子：

-(void)displayvalue:(id)sender {  
    UIButton *resultButton = (UIButton *)sender; 
    NSLog(@" The button's title is %@.", resultButton.currentTitle); 
} 

（请查看Xcode中的文档，它会给你正确的答案）

Answer 2

-(void)displayvalue:(id)sender 
{ 
    UIButton *resultebutton= (UIButton*)sender; 
    NSLog(@"The button title is %@ ", resultebutton.titleLabel.text); 
} 

Answer 3

-(void)clicketbutton { 
    UIButton *mybutton = [UIButton buttonWithType:UIButtonTypeCustom]; 
    [mybutton setTitle:@"Click here" forState:UIControlStateNormal]; 
    [mybutton addTarget:self 
     action:@selector(displayvalue:)forControlEvents:UIControlEventTouchUpInside]; 
} 
-(void)displayvalue:(id)sender {  

    NSLog(@"The title is %@ ", [mybutton titleForState:UIControlStateNormal]); 

} 

Answer 4

我知道这是一个老问题，但这可能是解决这个问题的最好方法。

NSLog(@"The button title is: %@", [sender currentTitle]);   

编辑
我刚刚才知道这是根据事实，你已接收参数设置为UIButton*。而不是使用默认的id，创建一个UIButton对象并将(id)sender转换为该按钮。切出的中间人，只是设置函数签名

-(void)buttonPressed:(UIButton*)sender{ 
    NSLog(@"Button title: %@",sender.currentTitle); 
} 

这是有效的铸造性能参数