(IOS)判断邮箱格式

+(BOOL)ValidateEmail:(NSString*)email {

    NSString *emailRegex = @"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,4}";

    NSPredicate*emailTest = [NSPredicatepredicateWithFormat:@"SELF MATCHES %@", emailRegex];

    return[emailTestevaluateWithObject:email];

}