UITextField如何禁用粘贴？ [复制]

Question

UITextField如何禁用粘贴？

Answer 1

覆盖canPerformAction:withSender: 方法以返回NO 用于您不想允许的操作：

- (BOOL)canPerformAction:(SEL)action withSender:(id)sender
    {
        if (action == @selector(paste:))
            return NO;
        if (action == @selector(select:))   
            return NO;   
        if (action == @selector(selectAll:))   
            return NO;  
        return [super canPerformAction:action withSender:sender];
    }

在上面的代码中，您只需要为 paste 编写

另一种方式

-(BOOL)canPerformAction:(SEL)action withSender:(id)sender {
    UIMenuController *menuController = [UIMenuController sharedMenuController];
    if (menuController) {
        [UIMenuController sharedMenuController].menuVisible = NO;
    }
    return NO;
}

同时检查This link

已编辑

在 iOS 7 中，你可以这样做，，，

- (BOOL)canPerformAction:(SEL)action withSender:(id)sender {
    [[NSOperationQueue mainQueue] addOperationWithBlock:^{
        [[UIMenuController sharedMenuController] setMenuVisible:NO animated:NO];
    }];
    return [super canPerformAction:action withSender:sender];
}

对于 Swift 用户

override public func canPerformAction(_ action: Selector, withSender sender: Any?) -> Bool {
    if action == #selector(copy(_:)) || action == #selector(paste(_:)) {
        return false
    }

    return true
}

---

如果您想在 TEXTFIELD 上打开日期选择器或选择器视图，请单击下面的代码。

在您的类中添加以下两个方法。

//Hide Menu View
override func canPerformAction(_ action: Selector, withSender sender: Any?) -> Bool {

    if YOURTEXTFIELD.isFirstResponder {
        DispatchQueue.main.async(execute: {
            (sender as? UIMenuController)?.setMenuVisible(false, animated: false)
        })
        return false
    }

    return super.canPerformAction(action, withSender: sender)
}

//必须实现

func textFieldShouldBeginEditing(_ textField: UITextField) -> Bool {
            return false
}