【小笔记】判断邮箱格式

判断邮箱格式是否正确的代码： 

 //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:@"SELF MATCHES%@",emailRegex];
     return [emailTest evaluateWithObject:email];
 }