【IOS开发】UItextfield输入电话号码，自动调整格式

UItextfield中实现输入电话号码，自动按位置在加“—”效果。效果图如下。

核心代码：

-(BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range

                                                      replacementString:(NSString *)string

{

    if (range.location == 13) {

        return NO;

    }else if (range.location == 8){

        

        NSMutableString *str = [[NSMutableString alloc] initWithString:phoneField.text];

        NSRange range = [str rangeOfString:@"-"];

        if (range.location!=NSNotFound)

        {



        }else {

             [str insertString:@"-" atIndex:3];

             [str insertString:@"-" atIndex:8];

             phoneField.text = str;

        }

        return YES;

    }else if(range.location==9) {

        NSMutableString *str = [[NSMutableString alloc] initWithString:phoneField.text];

        NSString *str1;

        str1 = [str stringByReplacingOccurrencesOfString:@"-"withString:@""];

        phoneField.text = str1;

        return YES;



    }else

    {

        return YES;

    }



}