iOS - 发送邮件

• 创建可变字符串
• 添加收件人
• 添加抄送人,如果没有设置成空即可
• 添加密送,如果没有设置成空
• 添加主题
• 添加邮件内容 &body=<b>email</b> body! 以标签的形式添加内容.

    NSMutableString *mailUrl = [[NSMutableString alloc]init];
    //添加收件人
    NSArray *toRecipients = [NSArray arrayWithObject: @"xxxxxxx@qq.com"];
    [mailUrl appendFormat:@"mailto:%@", [toRecipients componentsJoinedByString:@","]];
    //添加抄送
    NSArray *ccRecipients = [NSArray arrayWithObjects:@"", @"", nil];
    [mailUrl appendFormat:@"?cc=%@", [ccRecipients componentsJoinedByString:@","]];
    //添加密送
    NSArray *bccRecipients = [NSArray arrayWithObjects:@"", nil];
    [mailUrl appendFormat:@"&bcc=%@", [bccRecipients componentsJoinedByString:@","]];
    //添加主题
    [mailUrl appendString:@"&subject=关于加班笔记"];
    //添加邮件内容
    [mailUrl appendString:@"&body=<b>email</b> body!"];
    NSString* email = [mailUrl stringByAddingPercentEscapesUsingEncoding: NSUTF8StringEncoding];
    [[UIApplication sharedApplication] openURL: [NSURL URLWithString:email]];