ios - 我有很多格式，如 ####-##-##、(###)-###-####，我想将文本字段的值更改为给定格式，如何实现。？

Question

我有很多格式，如####-##-##、(###)-###-####，我想将文本字段的值更改为给定格式，如何实现.?

一种方法是手动检查字符串并将其更改为字符串，据我所知，还有其他有效的方法可以做到这一点吗？请让我，我正在为文本字段获取不同的格式，例如:

**Format1** for Textfield1 : ####-###-### [I want to convert enter text of field to this format like 3333-333-333]
**Format2** for Textfield2 : (###)-###-#### [I want to convert enter text of field to this format like (333)-333-3333]
**Format3** for Textfield3 : ##-##-## [I want to convert enter text of field to this format like 33-33-33] 

等如果有一些有效的方法来处理它，请告诉我。谢谢!

Answer 1

格式 2

在文本字段委托(delegate)方法中添加 if 条件 shouldChangeCharactersInRange:

 if (textField == self.addressPhoneNumberTextField) {
    int length = (int)[self getLength:textField.text];
    //NSLog(@"Length  =  %d ",length);

    NSCharacterSet *characterSet = [NSCharacterSet characterSetWithCharactersInString:@"0123456789\b"];
    string = [string stringByReplacingOccurrencesOfString:@" " withString:@""];
    if ([string rangeOfCharacterFromSet:[characterSet invertedSet]].location != NSNotFound) {
        return NO;
    }

    if(length == 10)
    {
        if(range.length == 0)
            return NO;
    }

    if(length == 3)
    {
        NSString *num = [self formatNumber:textField.text];
        textField.text = [NSString stringWithFormat:@"(%@) ",num];

        if(range.length > 0)
            textField.text = [NSString stringWithFormat:@"%@",[num substringToIndex:3]];
    }
    else if(length == 6)
    {
        NSString *num = [self formatNumber:textField.text];
        //NSLog(@"%@",[num  substringToIndex:3]);
        //NSLog(@"%@",[num substringFromIndex:3]);
        textField.text = [NSString stringWithFormat:@"(%@) %@-",[num  substringToIndex:3],[num substringFromIndex:3]];

        if(range.length > 0)
            textField.text = [NSString stringWithFormat:@"(%@) %@",[num substringToIndex:3],[num substringFromIndex:3]];
    }

    return YES;
}

- (NSString *)formatNumber:(NSString *)mobileNumber
{
    mobileNumber = [mobileNumber stringByReplacingOccurrencesOfString:@"(" withString:@""];
mobileNumber = [mobileNumber stringByReplacingOccurrencesOfString:@")" withString:@""];
mobileNumber = [mobileNumber stringByReplacingOccurrencesOfString:@" " withString:@""];
mobileNumber = [mobileNumber stringByReplacingOccurrencesOfString:@"-" withString:@""];
mobileNumber = [mobileNumber stringByReplacingOccurrencesOfString:@"+" withString:@""];

int length = (int)[mobileNumber length];
if(length > 10)
{
    mobileNumber = [mobileNumber substringFromIndex: length-10];

}

return mobileNumber;
}

- (int)getLength:(NSString *)mobileNumber
{
mobileNumber = [mobileNumber stringByReplacingOccurrencesOfString:@"(" withString:@""];
mobileNumber = [mobileNumber stringByReplacingOccurrencesOfString:@")" withString:@""];
mobileNumber = [mobileNumber stringByReplacingOccurrencesOfString:@" " withString:@""];
mobileNumber = [mobileNumber stringByReplacingOccurrencesOfString:@"-" withString:@""];
mobileNumber = [mobileNumber stringByReplacingOccurrencesOfString:@"+" withString:@""];

int length = (int)[mobileNumber length];

return length;
}