Disable third-party keyboard for a uitextfield

In daily development, aUITextFieldOnly numbers can be entered, but the installation of a third-party keyboard (Sogou, Baidu, etc.) will be affected, so the third-party keyboard needs to be disabled.

Disabling the third-party keyboard requiresAppDelegate.mThe following code is implemented in

- (BOOL)application:(UIApplication *)application
shouldAllowExtensionPointIdentifier:(NSString *)extensionPointIdentifier
{
    if ([extensionPointIdentifier isEqualToString:@"com.apple.keyboard-service"]) {
        return NO;
    }
    return YES;
}

In this way, the third-party keyboard is disabled globally. For aUITextFieldTo disable the third-party keyboard

For aUITextFieldDisable third-party keyboard

1. toUITextFieldCreate a category, and then in the category Add an instance object attribute to the H fileyxc_usingSystemKeyboardAnd a class object attributeyxc_globalUsingSystemKeyboard

   @property (nonatomic, assign) BOOL yxc_ usingSystemKeyboard;  /**<  Using the system keyboard*/
   @property (nonatomic, assign, class) BOOL yxc_ globalUsingSystemKeyboard;   /**<  Whether the system keyboard is used globally. The active setting is invalid*/

2. Association attribute

   - (void)setYxc_usingSystemKeyboard:(BOOL)yxc_usingSystemKeyboard {
       
       objc_setAssociatedObject(self, @selector(yxc_usingSystemKeyboard), @(yxc_usingSystemKeyboard), OBJC_ASSOCIATION_ASSIGN);
   }
   
   - (BOOL)yxc_usingSystemKeyboard {
       
       NSNumber *yxc_usingSystemKeyboard = objc_getAssociatedObject(self, @selector(yxc_usingSystemKeyboard));
       return [yxc_usingSystemKeyboard boolValue];
   }
   
   + (void)setYxc_globalUsingSystemKeyboard:(BOOL)yxc_globalUsingSystemKeyboard {
       
       objc_setAssociatedObject(self, @selector(yxc_globalUsingSystemKeyboard), @(yxc_globalUsingSystemKeyboard), OBJC_ASSOCIATION_ASSIGN);
   }
   
   + (BOOL)yxc_globalUsingSystemKeyboard {
       
       NSNumber *yxc_globalUsingSystemKeyboard = objc_getAssociatedObject(self, @selector(yxc_globalUsingSystemKeyboard));
       return [yxc_globalUsingSystemKeyboard boolValue];
   }
   

3. monitorUITextFieldTextDidBeginEditingNotificationandUITextFieldTextDidEndEditingNotificationnotice

    [[NSNotificationCenter defaultCenter] addObserver:self
                                            selector:@selector(textFieldDidBeginEdit:)
                                                name:UITextFieldTextDidBeginEditingNotification
                                              object:self];
   
   [[NSNotificationCenter defaultCenter] addObserver:self
                                            selector:@selector(textFieldDidEndEdit:)
                                                name:UITextFieldTextDidEndEditingNotification
                                              object:self];
   

4. Listening toUITextFieldTextDidBeginEditingNotificationandUITextFieldTextDidEndEditingNotificationNotification pairyxc_globalUsingSystemKeyboardValue modification

   - (void)textFieldDidBeginEdit:(NSNotification *)notification {
       
       UITextField.yxc_globalUsingSystemKeyboard = self.yxc_usingSystemKeyboard;
   }
   
   - (void)textFieldDidEndEdit:(NSNotification *)notification {
       
       UITextField.yxc_globalUsingSystemKeyboard = NO;
   }
   

5. AppDelegateinapplication:shouldAllowExtensionPointIdentifier:Modified in method

   - (BOOL)application:(UIApplication *)application shouldAllowExtensionPointIdentifier:(NSString *)extensionPointIdentifier
    {
     if ([extensionPointIdentifier isEqualToString:@"com.apple.keyboard-service"]) {
         if (UITextField.yxc_globalUsingSystemKeyboard) {
             return NO;
         }
     }
     return YES;
   }
   

   ByUITextFieldInstance object settingsyxc_usingSystemKeyboardAttribute value isYESAnd then to someoneUITextFieldThird party keyboards are disabled

   effect:

Disables third-party keyboard effects for an input field gif

Here, the default style of the first input box is not to disable the third-party keyboard. The second input box disables the third-party keyboard and sets the keyboard style toUIKeyboardTypeNumberPad

code