验证邮箱、手机号码的合法性

//验证邮箱的合法性
- (BOOL)validateInput:(UITextField *)input {
    
    if (input.text.length <= 0) {
        
        self.errorMessage = @"没有输入";
        
    } else {
        
        NSString *emailRegex = @"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,4}";
        NSPredicate *emailTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@",emailRegex];
        
        BOOL isValid = [emailTest evaluateWithObject:input.text];
        if (isValid == NO) {
            
            self.errorMessage = @"请输入正确的邮箱";
            
        } else {
            
            self.errorMessage = nil;
        }
    }
    
    return self.errorMessage == nil;
}

//验证手机号码的合法性
- (BOOL)validateInput:(UITextField *)input {
    
    if (input.text.length <= 0) {
        
        self.errorMessage = @"没有输入";
        
    } else {
        // 移动号段正则表达式
        NSString *CM_NUM = @"^((13[4-9])|(147)|(15[0-2,7-9])|(178)|(18[2-4,7-8]))\\d{8}|(1705)\\d{7}$";
        // 联通号段正则表达式
        NSString *CU_NUM = @"^((13[0-2])|(145)|(15[5-6])|(176)|(18[5,6]))\\d{8}|(1709)\\d{7}$";
        //电信号段正则表达式
        NSString *CT_NUM = @"^((133)|(153)|(177)|(18[0,1,9]))\\d{8}$";
        
        NSPredicate *pred1 = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", CM_NUM];
        BOOL isMatch1 = [pred1 evaluateWithObject:input.text];
        
        NSPredicate *pred2 = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", CU_NUM];
        BOOL isMatch2 = [pred2 evaluateWithObject:input.text];
        
        NSPredicate *pred3 = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", CT_NUM];
        BOOL isMatch3 = [pred3 evaluateWithObject:input.text];
        
        if (isMatch1 || isMatch2 || isMatch3) {
            
            self.errorMessage = nil;
            
        }else{
            
            self.errorMessage = @"请输入正确的手机号码";
        }
    }
    
    return self.errorMessage == nil;
}