锁定MFMailComposeViewController中的字段 [英] Locking the Fields in MFMailComposeViewController

问题描述

是否可以以某种方式锁定 MFMailComposeViewController 中的字段，以便用户无法更改正文，收件人等？我需要用户发送的电子邮件去一个特定的帐户和身体符合某些标准，所以如果用户彻底地编辑格式，一切都可能会非常错误。在身体从用户的数据填充的时刻输入到上一个视图中的文本框和日期选择器。

Is it possible to somehow lock the fields in an MFMailComposeViewController so that the body, recipients etc cannot be changed by the user? I need the e-mail the user sends to go to a particular account and the body to meet certain criteria so if the user drastically edits the format everything could go horribly wrong..At the moment the body is filled in from data that the user inputs to textfields and date-pickers in the previous view.

基本上我认为让字段锁定而不是显示警报或者说请不要编辑消息，所以如果字段不能被锁定，它不是一个巨大的问题，但任何帮助将不胜感激。

Basically I think it would just be more professional to have the fields locked rather than display an alert or something saying "Please Don't Edit the Message", so its not a massive problem if the fields can't be locked, but any help would be greatly appreciated.

推荐答案

从下面的链接下载框架。然后我已经汇集了一些代码，发送电子邮件与一个不错的请等待覆盖。当它运行（需要几秒钟）时，我附上了一个这样的形象。请注意，我不建议使用SMTP框架。它是从互联网上被永久搜索后下载的。
您可以下载的zip文件包括我为用户反馈创建的重叠图像。它有@ 2x和常规。您将不得不进入界面构建器并创建标签，虽然说发送测试驱动器..。它已经在代码中，但我没有添加它从代码。所以你必须添加到IB。

Download the framework from the link below. Then I have put together some code that sends the email with a nice "please wait" overlay. I have attached an image of what this looks like while its running (for the few seconds it takes). Please note, I take no credit for creating the SMTP framework. It was downloaded from the internet after searching for it forever. The zip file that you can download includes the overlay images that I created for user feedback. It has both @2x and regular. You will have to go into interface builder and create the label though that says "sending test drive..". Its already in the code but I didnt add it from code. So youll have to add it in IB.

1。确保将
的框架下载到您的项目。

1. Make sure to add the framework you downloaded to your project.

2。确保将CFNetwork框架添加到项目中

2. Make sure to add the CFNetwork framework to your project

3。确保在界面构建器

4中附加UILabel名称
loadingLabel。
代码引用的用户名和密码是smtp
服务器。如果你没有一个创建
一个Gmail帐户并使用gmail
设置。如果你不熟悉
与gmail设置googlegmail
smtp，你会发现你需要的。

4. The username and password that the code is refering to is an smtp server. If you dont have one create a gmail account and use gmail settings. If you are not familiar with gmail settings google "gmail smtp" you will find what you need.

Find Framework&这里的艺术品

对于.h文件，请确保包含：

For your .h file make sure to include:

//for sending email alert
UIActivityIndicatorView * spinner;
UIImageView * bgimage;
IBOutlet UILabel * loadingLabel;

}
@property (nonatomic, retain)IBOutlet UILabel * loadingLabel;
@property (nonatomic, retain)UIImageView * bgimage;
@property (nonatomic, retain)UIActivityIndicatorView * spinner;
-(void)sendEmail;
-(void)removeWaitOverlay;
-(void)createWaitOverlay;
-(void)stopSpinner;
-(void)startSpinner;

对于.m文件，包括：

@synthesize bgimage,spinner,loadingLabel;

// add this in ViewDidLoad
//set loading label to alpha 0 so its not displayed
loadingLabel.alpha = 0;

其他都是自己的功能

-(void)sendEmail {


    // create soft wait overlay so the user knows whats going on in the background.
    [self createWaitOverlay];

    //the guts of the message.
    SKPSMTPMessage *testMsg = [[SKPSMTPMessage alloc] init];
    testMsg.fromEmail = @"[e-mail]";
    testMsg.toEmail = @"[e-mail]";
    testMsg.relayHost = @"smtpout.yourserver.net";
    testMsg.requiresAuth = YES;
    testMsg.login = @"[e-mail]";
    testMsg.pass = @"yourPassWord";
    testMsg.subject = @"This is the email subject line";
    testMsg.wantsSecure = YES; // smtp.gmail.com doesn't work without TLS!



    // Only do this for self-signed certs!
    // testMsg.validateSSLChain = NO;
    testMsg.delegate = self;

    //email contents
    NSString * bodyMessage = [NSString stringWithFormat:@"This is the body of the email. You can put anything in here that you want."];


    NSDictionary *plainPart = [NSDictionary dictionaryWithObjectsAndKeys:@"text/plain",kSKPSMTPPartContentTypeKey,
                               bodyMessage ,kSKPSMTPPartMessageKey,@"8bit",kSKPSMTPPartContentTransferEncodingKey,nil];

    testMsg.parts = [NSArray arrayWithObjects:plainPart,nil];

    [testMsg send];

}


- (void)messageSent:(SKPSMTPMessage *)message
    {
    [message release];

    //message has been successfully sent . you can notify the user of that and remove the wait overlay
    [self removeWaitOverlay];



    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Message Sent" message:@"Thanks, we have sent your message"
                                                   delegate:self cancelButtonTitle:@"OK" otherButtonTitles: nil];
    [alert show];
    [alert release];
}

- (void)messageFailed:(SKPSMTPMessage *)message error:(NSError *)error
{
    [message release];
    [self removeWaitOverlay];

    NSLog(@"delegate - error(%d): %@", [error code], [error localizedDescription]);

    UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Email Error" message:@"Sending Failed - Unknown Error :-("
                                                   delegate:self cancelButtonTitle:@"OK" otherButtonTitles: nil];
    [alert show];
    [alert release];
}



-(void)createWaitOverlay {

    // fade the overlay in
    loadingLabel = @"Sending Test Drive...";
    bgimage = [[UIImageView alloc] initWithFrame:CGRectMake(0,0,320,480)];
    bgimage.image = [UIImage imageNamed:@"waitOverLay.png"];
    [self.view addSubview:bgimage];
    bgimage.alpha = 0;
    [bgimage addSubview:loadingLabel];
    loadingLabel.alpha = 0;


    [UIView beginAnimations: @"Fade In" context:nil];
    [UIView setAnimationDelay:0];
    [UIView setAnimationDuration:.5];
    bgimage.alpha = 1;
    loadingLabel.alpha = 1;
    [UIView commitAnimations];
    [self startSpinner];

    [bgimage release];

}

-(void)removeWaitOverlay {

    //fade the overlay out

    [UIView beginAnimations: @"Fade Out" context:nil];
    [UIView setAnimationDelay:0];
    [UIView setAnimationDuration:.5];
    bgimage.alpha = 0;
    loadingLabel.alpha = 0;
    [UIView commitAnimations];
    [self stopSpinner];


}

-(void)startSpinner {

    spinner = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhiteLarge];
    spinner.hidden = FALSE;
    spinner.frame = CGRectMake(137, 160, 50, 50);
    [spinner setHidesWhenStopped:YES];
    [self.view addSubview:spinner];
    [self.view bringSubviewToFront:spinner];
    [spinner startAnimating];
}

-(void)stopSpinner {

    [spinner stopAnimating];
    [spinner removeFromSuperview];
    [spinner release];

}

最终结果如下所示。屏幕看起来有点昏暗（有些类似于UIAlert显示）。它显示一条消息，表示它被发送，然后在发送消息时增亮备份。

The final results are shown below. The screen appears to dim a bit (kind of like when an UIAlert is shown). It shows a message saying its being sent, and then "brightens" back up when the message is sent.

快乐编码!!

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