IOS-how to remove the UITextField long-pressed gesture menu and input content restrictions

IOS-how to remove the UITextField long-pressed gesture menu and input content restrictions

If this is used in the project today, you can use it directly when you do not know it.

First, rewrite the UITextFiled subclass. copy the following method under the initialization method to disable the long-pressed menu.

// Disable copy paste from the long-pressed menu of textField.

-(BOOL) can1_maction :( SEL) action withSender :( id) sender

{

If ([UIMenuControllersharedMenuController]) {

[UIMenuControllersharedMenuController]. menuVisible = NO;

}

Return NO;

}

During development, we sometimes perform some operations on UITextFiled to explain how to enter only Chinese characters, or just numbers and 2 Chinese methods.

I directly use macro definition:

# Define kAlphaNum @ "abcdefghijklmnopqrstuvwxyz" // This type indicates that only Chinese characters are input and other numbers or symbols are not allowed.

# Define kEnglishNum @ "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789" // only numbers and English letters can be entered.

Run the delegate method of UITextField. Remember textFiled. delegate = self;

The following code is directly used:

-(BOOL) textField :( UITextField *) textField shouldChangeCharactersInRange :( nsange) range replacementString :( NSString *) string

{

UITextField * nameField = (UITextField *) [selfviewWithTag: 200];

UITextField * cardField = (UITextField *) [selfviewWithTag: 201];

If (textField = nameField ){

// Only Chinese characters can be entered

NSCharacterSet * cs;

Cs = [[NSCharacterSetcharacterSetWithCharactersInString: kAlphaNum] invertedSet];

NSString * filtered = [[stringcomponentsSeparatedByCharactersInSet: cs] componentsJoinedByString: @ ""];

BOOL basic = [string isEqualToString: filtered];

NSString * text = [textField. textstringByReplacingCharactersInRange: range withString: string];

If (_ delegate & [_ delegaterespondsToSelector: @ selector (passName :)]) {

[_ DelegatepassName: text];

}

Return basic;

}

If (textField = cardField ){

// Only English and numbers are allowed.

NSCharacterSet * cs;

Cs = [[NSCharacterSetcharacterSetWithCharactersInString: kEnglishNum] invertedSet];

NSString * filtered = [[stringcomponentsSeparatedByCharactersInSet: cs] componentsJoinedByString: @ ""];

BOOL basic = [string isEqualToString: filtered];

NSString * text = [textField. textstringByReplacingCharactersInRange: range withString: string];

If (_ delegate & [_ delegaterespondsToSelector: @ selector (passCard :)]) {

[_ DelegatepassCard: text];

}

Return basic;

}

Return YES;

}