判断邮箱是否正确

//利用正则表达式验证

-(BOOL)isValidateEmail:(NSString *)email

//利用正则表达式验证
-(BOOL)isValidateEmail:(NSString *)email
{
 
    NSString *emailRegex = @"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,4}";
 
    NSPredicate *emailTest = [NSPredicate predicateWithFormat:@"SELFMATCHES%@",emailRegex];
 
    return [emailTest evaluateWithObject:email];
}