iOS 判断邮箱格式是否正确的代码

-(BOOL)isValidateEmail:(NSString *)email
 
{
 
NSString *emailRegex = @"[A-Z0-9a-z._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,4}";
 
NSPredicate *emailTest = [NSPredicate predicateWithFormat:@"SELF MATCHES%@",emailRegex];
 
return [emailTest evaluateWithObject:email];
 
}