启用复制和上的UITextField粘贴没有使它可编辑

Question

我想在UITextField文本（或理想情况下，UILabel）是不可编辑，但同时使用户能够复制粘贴功能别处。

Answer 1

我的最终解决方案是以下几点：

我创建的UILabel的一个子类（的UITextField应该工作一样），显示被挖掘出来后，UIMenuController。 CopyableLabel.m看起来是这样的：

@implementation CopyableLabel 


- (BOOL)canPerformAction:(SEL)action withSender:(id)sender { 
if(action == @selector(copy:)) { 
    return YES; 
} 
else { 
    return [super canPerformAction:action withSender:sender]; 
} 
} 


- (BOOL)canBecomeFirstResponder { 
return YES; 
} 


- (BOOL)becomeFirstResponder { 
if([super becomeFirstResponder]) { 
    self.highlighted = YES; 
    return YES; 
} 
return NO; 
} 


- (void)copy:(id)sender { 
UIPasteboard *board = [UIPasteboard generalPasteboard]; 
[board setString:self.text]; 
self.highlighted = NO; 
[self resignFirstResponder]; 
} 


- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event { 
if([self isFirstResponder]) { 
    self.highlighted = NO; 
    UIMenuController *menu = [UIMenuController sharedMenuController]; 
    [menu setMenuVisible:NO animated:YES]; 
    [menu update]; 
    [self resignFirstResponder]; 
} 
else if([self becomeFirstResponder]) { 
    UIMenuController *menu = [UIMenuController sharedMenuController]; 
    [menu setTargetRect:self.bounds inView:self]; 
    [menu setMenuVisible:YES animated:YES]; 
} 
} 


@end 

Answer 2

尝试UITextView改为（我怀疑它会像你的UILabel一样）。我测试了它的editable属性设置为NO，并为我工作了双击 - 复制。

Answer 3

另一种解决方案是保持启用UITextField但编程防止它被编辑。这与以下委托方法实现：

- (BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string 
{ 
    return NO; 
} 

我不知道可能存在的限制，虽然，目前适合我的需要。

Answer 4

这个问题很老了，我很惊讶没有人发布没有子类化的解决方案。在@ mrueg的答案中提出的想法是正确的，但你不应该需要任何子类。我只是遇到了这个问题，并解决它像这样：

在我的视图控制器：

- (void)viewDidLoad { 
    self.textField.delegate = self; 
    self.textField.text = @"Copyable, non-editable string."; 
} 

- (BOOL)canBecomeFirstResponder { 
    return YES; 
} 

- (void)copyTextFieldContent:(id)sender { 
    UIPasteboard* pb = [UIPasteboard generalPasteboard]; 
    pb.string = self.textField.text; 
} 

- (BOOL)textFieldShouldBeginEditing:(UITextField *)textField { 
    // UIKit changes the first responder after this method, so we need to show the copy menu after this method returns. 
    dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.3*NSEC_PER_SEC)), dispatch_get_main_queue(), ^{ 
     [self becomeFirstResponder]; 
     UIMenuController* menuController = [UIMenuController sharedMenuController]; 
     UIMenuItem* copyItem = [[UIMenuItem alloc] initWithTitle:@"Copy" 
                  action:@selector(copyTextFieldContent:)]; 
     menuController.menuItems = @[copyItem]; 
     CGRect selectionRect = textField.frame; 
     [menuController setTargetRect:selectionRect inView:self.view]; 
     [menuController setMenuVisible:YES animated:YES]; 
    }); 
    return NO; 
} 

如果你想使这项工作的UILabel，它应该工作方式相同，只需增加一个水龙头手势识别器而不是使用委托方法。

Answer 5

以下代码保存了我。

textField.addTarget(target, action: "textFieldEditingDidEndAction:", forControlEvents: [.EditingDidEnd]) 

看来Paste是一个单一，完整的编辑事件。

Answer 6

这将做你需要的一切。将可复制。但不可编辑，并且不会显示键盘或光标。

class ViewController: UIViewController { 

    @IBOutlet weak var copyableUneditableTextfield: UITextField! 

    override func viewDidLoad() { 
     super.viewDidLoad() 

     copyableUneditableTextfield.delegate = self 
     copyableUneditableTextfield.inputView = UIView() //prevents keyboard  
     copyableUneditableTextfield.tintColor = .clear  //prevents cursor 
     copyableUneditableTextfield.text = "Some Text You Want User To Copy But Not Edit" 

    } 

} 

extension ViewController: UITextFieldDelegate { 

    func textField(_ textField: UITextField, shouldChangeCharactersIn range: NSRange, replacementString string: String) -> Bool { 
     return false //prevents editing 
    } 

}