iOS手机号码的正确输入

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如何用正则表达式判断输入的手机号是否是规定的手机号

#pragma mark UITextFieldDelegate//只允许输入数字，且只有11位数-(BOOL)textField:(UITextField *)textField shouldChangeCharactersInRange:(NSRange)range replacementString:(NSString *)string{    if (textField.text.length == 11) {        if ([string isEqualToString:@""]) {            return YES;        }        else {            return NO;        }    }    return [self validateNumber:string];}//只允许输入数字- (BOOL)validateNumber:(NSString*)number{    BOOL res = YES;    NSCharacterSet* tmpSet = [NSCharacterSet characterSetWithCharactersInString:@"0123456789"];    int i = 0;    while (i < number.length) {        NSString * string = [number substringWithRange:NSMakeRange(i, 1)];        NSRange range = [string rangeOfCharacterFromSet:tmpSet];        if (range.length == 0) {            res = NO;            break;        }        i++;    }    return res;}//检查是否为手机号的方法-(BOOL)checkPhoneNumInput:(NSString *)phoneStr{    NSString *photoRange = @"^1(3[0-9]|4[0-9]|5[0-9]|7[0-9]|8[0-9])\\d{8}$";//正则表达式    NSPredicate *regexMobile = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",photoRange];    BOOL result = [regexMobile evaluateWithObject:phoneStr];    if (result) {        return YES;    } else {        return NO;    }}

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