How to disable copy paste option from UITextField programmatically

问题

I am making a registration alertview that has a UITextField in it where the user can enter their registration number. everything is pretty much their, however I would like to remove the copy paste function from the textfield programmatically since their is no InterfaceBuilder version of the textfield I have no idea how to do this..

here Is my UIalertview thus far...

- (void)pleaseRegisterDevice {

    UIAlertView *myAlertView = [[UIAlertView alloc] initWithTitle:@"Please Register Device!" message:@"this gets covered" delegate:self cancelButtonTitle:nil otherButtonTitles:@"OK", nil];
    regTextField = [[UITextField alloc] initWithFrame:CGRectMake(12.0, 45.0, 260.0, 25.0)];
    [regTextField setBackgroundColor:[UIColor whiteColor]];
    regTextField.textAlignment = UITextAlignmentCenter;
    [myAlertView addSubview:regTextField];
    [myAlertView show];
    [myAlertView release];

}

回答1:

This post has many nice solutions: How disable Copy, Cut, Select, Select All in UITextView

My favourite is to override canPerformAction:withSender::

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

回答2:

Storyboard users may want to look at this solution, as long as you are ok with subclassing.

I don't think that there is an easy way to achieve this through extensions or protocols.

Swift 3.1

import UIKit

@IBDesignable
class CustomTextField: UITextField {

    @IBInspectable var isPasteEnabled: Bool = true

    @IBInspectable var isSelectEnabled: Bool = true

    @IBInspectable var isSelectAllEnabled: Bool = true

    @IBInspectable var isCopyEnabled: Bool = true

    @IBInspectable var isCutEnabled: Bool = true

    @IBInspectable var isDeleteEnabled: Bool = true

    override func canPerformAction(_ action: Selector, withSender sender: Any?) -> Bool {
        switch action {
        case #selector(UIResponderStandardEditActions.paste(_:)) where !isPasteEnabled,
             #selector(UIResponderStandardEditActions.select(_:)) where !isSelectEnabled,
             #selector(UIResponderStandardEditActions.selectAll(_:)) where !isSelectAllEnabled,
             #selector(UIResponderStandardEditActions.copy(_:)) where !isCopyEnabled,
             #selector(UIResponderStandardEditActions.cut(_:)) where !isCutEnabled,
             #selector(UIResponderStandardEditActions.delete(_:)) where !isDeleteEnabled:
            return false
        default:
            //return true : this is not correct
            return super.canPerformAction(action, withSender: sender)
        }
    }
}

Gist link

回答3:

For iOS8.0+, Xcode 6.0.1, ARC enabled

Hoping to save a beginner, like myself, some time implementing this...

To implement disabling copy/paste/cut/etc. you must subclass UITextField and override...

- (BOOL)canPerformAction:(SEL)action withSender:(id)sender

To do this...

Create a new class that is a subclass of UITextField (i.e. a new .h and .m files to be included within your app folder). So File->New->"Cocoa Touch Class"->Next->"PasteOnlyUITextField" (for example), subclass of "UITextField"->Next->Create.

Once the .h and .m files are created for our new subclass of UITextField called "PasteOnlyUITextField"...

PasteOnlyUITextField.h

#import <UIKit/UIKit.h>

@interface PasteOnlyUITextField : UITextField

@end

PasteOnlyUITextField.m

#import "PasteOnlyUITextField.h"

@implementation PasteOnlyUITextField

/*
// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
- (void)drawRect:(CGRect)rect {
    // Drawing code
}
*/

- (BOOL)canPerformAction:(SEL)action withSender:(id)sender
{
    if (action == @selector(paste:))
    {
        return true;
    }

    return false;
}

@end

Now make sure you import PasteOnlyUITextField.h where you are going to use it, e.g. YourUIViewController.h file...

#import "PasteOnlyUITextField.h"

Now you must use the subclass, either progrommatically or with identity inspector

PasteOnlyUITextField *pasteOnlyUITextField = [[PasteOnlyUITextField alloc] init...];

or...

Select the UITextField and go to the identity inspector, select its class.

You can change the logic associated with the menu options as you see fit...

Hope this helps! Thanks to all the original contributors.

回答4:

I have found a way with swift using extension and associatedObject without subclassing. I use a property readonly to disable paste/cut but this sample can be adapted.

Swift 3 updated as of 27/11/2016

var key: Void?

class UITextFieldAdditions: NSObject {
    var readonly: Bool = false
}

extension UITextField {
    var readonly: Bool {
        get {
           return self.getAdditions().readonly
     } set {
        self.getAdditions().readonly = newValue
    }
}

private func getAdditions() -> UITextFieldAdditions {
    var additions = objc_getAssociatedObject(self, &key) as? UITextFieldAdditions
    if additions == nil {
        additions = UITextFieldAdditions()
        objc_setAssociatedObject(self, &key, additions!, objc_AssociationPolicy.OBJC_ASSOCIATION_RETAIN)
    }
    return additions!
}

open override func target(forAction action: Selector, withSender sender: Any?) -> Any? {
    if ((action == #selector(UIResponderStandardEditActions.paste(_:)) || (action == #selector(UIResponderStandardEditActions.cut(_:)))) && self.readonly) {
        return nil
    }
    return super.target(forAction: action, withSender: sender)
}

}

Other Swift (2.2)

import UIKit

var key: Void?

class UITextFieldAdditions: NSObject {
    var readonly: Bool = false
}

extension UITextField {
    var readonly: Bool {
        get {
            return self.getAdditions().readonly
        }
        set {
            self.getAdditions().readonly = newValue
        }
    }

    private func getAdditions() -> UITextFieldAdditions {
        var additions = objc_getAssociatedObject(self, &key) as? UITextFieldAdditions
        if additions == nil {
            additions = UITextFieldAdditions()
            objc_setAssociatedObject(self, &key, additions!, objc_AssociationPolicy(OBJC_ASSOCIATION_RETAIN_NONATOMIC))
        }
        return additions!
    }

    public override func targetForAction(action: Selector, withSender sender: AnyObject?) -> AnyObject? {
        if ((action == Selector("paste:") || (action == Selector("cut:"))) && self.readonly) {
            return nil
        }
        return super.targetForAction(action, withSender: sender)
    }

}

回答5:

Implement this Method in ViewController.m This Method will help you to disable Options on UITextField.

It Includes paste, select, selectAll and copy option on your Corresponding UITextField.

This method is very useful in case of UITextField when you want to take this for Password or DateOfBirth or whatever you want.

- (BOOL)canPerformAction:(SEL)action withSender:(id)sender {
    if ((_TextField1 isFirstResponder] || [_TextFied2 isFirstResponder]) {
        [[NSOperationQueue mainQueue] addOperationWithBlock:^{
            [[UIMenuController sharedMenuController] setMenuVisible:NO animated:NO];
        }];
    }
    return [super canPerformAction:action withSender:sender];
}

回答6:

In iOS 9 we can hide the copy paste bar from keyboard

-(void) customMethod{

   yourTextField.inputAssistantItem.leadingBarButtonGroups = @[];
   yourTextField.inputAssistantItem.trailingBarButtonGroups = @[];

}

回答7:

NOTE: In Swift, If you want your text field to disable all UIResponderStandardEditActions (cut, copy, paste, look up, share, select), use this is UITextFieldDelegate.

func textFieldShouldBeginEditing(_ textField: UITextField) -> Bool {
    textField.isUserInteractionEnabled = false
    return true
}

func textFieldDidEndEditing(_ textField: UITextField) {
    textField.isUserInteractionEnabled = true
}

回答8:

Small update of this answer for iOS 10 and earlier (Swift 3):

open override func target(forAction action: Selector, withSender sender: Any?) -> Any? {
    guard isReadonly else {
        return super.target(forAction: action, withSender: sender)
    }

    if #available(iOS 10, *) {
        if action == #selector(UIResponderStandardEditActions.paste(_:)) {
            return nil
        }
    } else {
        if action == #selector(paste(_:)) {
            return nil
        }
    }

    return super.target(forAction: action, withSender: sender)
}

回答9:

If disabled text selection works for you, try this.

class NoMoreSelectionTextField: UITextField {

    override func caretRect(for position: UITextPosition) -> CGRect {
        return CGRect.zero
    }

    override var selectedTextRange: UITextRange? {
        get { return nil }
        set { return }
    }
}

回答10:

Try this in your viewController

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

回答11:

Swift 5 solution:

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

    return true
}

回答12:

you can extension textview or textfield in swift, like this:

extension UITextView {    
    open override func canPerformAction(_ action: Selector, withSender sender: Any?) -> Bool {
    return false
    }
}

回答13:

Overriding targetForAction:withSender is best IMHO:

- (id)targetForAction:(SEL)action withSender:(id)sender
{
    if (action == @selector(paste:)) {
        return nil;
    }
    return [super targetForAction:action withSender:sender];
}

回答14:

Swift 3.0 version

class NoMenuTextField: UITextField {
    override func canPerformAction(action: Selector, withSender sender: AnyObject?) -> Bool {
        if (action == #selector(NSObject.paste(_:))) {
            return false
        }
        return super.canPerformAction(action, withSender: sender)
    }
}

回答15:

use for iOS 7 or later

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

}