iOS 邮箱正则表达式

//进行邮箱正则表达式判断

-(BOOL) validateEmail

{

    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:self];

}

这里面的self 是因为这个方法是写在category的 NSString + SiZheString.m 中

所以调取方式应该是

if([@"字符串"  validateEmail]){

}

这种样式

如果是自己不想封装

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

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

   Bool  isTrue =  [emailTest evaluateWithObject:@"字符串"];