如何在 iPhone 文本字段中添加按钮？
-(void)ViewDidLoad{
UITextField *txt = [[UITextField alloc]initWithFrame:CGRectMake(140, 120, 160, 40)];
txt.returnKeyType = UIReturnKeyDone;
txt.placeholder = @"enter name";
[txt setBorderStyle:UITextBorderStyleRoundedRect];
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
[button setImage:[UIImage imageNamed:@"icon_chapter.png"] forState:UIControlStateNormal];
button.imageEdgeInsets = UIEdgeInsetsMake(0, -16, 0, 0);
[button addTarget:self action:@selector(refresh:) forControlEvents:UIControlEventTouchUpInside];
txt.rightView = button;
txt.rightViewMode = UITextFieldViewModeAlways;
[self.view addSubview:txt];
}
-(IBAction)refersh:(id)sender{
}
上面的代码显示了一个文本字段，其右上角有按钮，但是当我单击它时，模拟器崩溃了。我不明白它背后的区域是什么。谁能告诉我哪里错了
-(void)ViewDidLoad{
UITextField *txt = [[UITextField alloc]initWithFrame:CGRectMake(140, 120, 160, 40)];
txt.returnKeyType = UIReturnKeyDone;
txt.placeholder = @"enter name";
[txt setBorderStyle:UITextBorderStyleRoundedRect];
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
[button setImage:[UIImage imageNamed:@"icon_chapter.png"] forState:UIControlStateNormal];
button.imageEdgeInsets = UIEdgeInsetsMake(0, -16, 0, 0);
[button addTarget:self action:@selector(refresh:) forControlEvents:UIControlEventTouchUpInside];
txt.rightView = button;
txt.rightViewMode = UITextFieldViewModeAlways;
[self.view addSubview:txt];
}
-(IBAction)refersh:(id)sender{
}
above code shows a textfield with button at its right corner but when i clicked on it simulator crash. i can't understand whats the region behind it. any body tell where i'm wrong
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评论（1）
当您发送 @selector(refresh:) 时，您的方法拼写为 -refersh: 。这是错字吗？
另外，您似乎泄漏了 UITextField，这很容易修复：
Your method is spelled -refersh: while you send @selector(refresh:). Is it the typo?
Also, you seem to be leaking the UITextField, which is quite easy to fix: