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我已经对这个问题进行了搜索，但没有找到答案，这导致我在这里写下我的第一个问题。

问题是当我按下调用下面方法的按钮时，我在这一行得到一个异常：[self presentModalViewController:mailViewController animated:YES];异常是：

*由于未捕获的异常“NSInvalidArgumentException”而终止应用程序，原因：“-[NSCFString 计数]：无法识别的选择器发送到实例 0x20f6c”

此外，如果有帮助，我会在模拟器上运行我的应用程序。

我从这里得到了代码的大部分。

这是我的代码（电子邮件地址为空白）：

    // set up the email address array
    NSArray *email = [[NSArray alloc] initWithObjects:@"foo", nil];

    // Set up the view controller
    MFMailComposeViewController *mailViewController = [[MFMailComposeViewController alloc] init];
    mailViewController.mailComposeDelegate = self;

    // Set up the email to send to
    [mailViewController setSubject:@"foo"];
    [mailViewController setToRecipients:[email objectAtIndex:0]];

    // Get the path to the plist
    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); 
    NSString *documentsPath = [paths objectAtIndex:0];  
    NSString *path = [documentsPath stringByAppendingPathComponent:@"foo.plist"];

    // Get the plist from the path
    NSData *myData = [NSData dataWithContentsOfFile:path];
    [mailViewController addAttachmentData:myData mimeType:@"plist" fileName:@"foo"];

    // Fill out the email body text 
    NSString *emailBody = @"Attached PLIST file";
    [mailViewController setMessageBody:emailBody isHTML:NO];

    // Release the array
    [email release];

    if (mailViewController != nil) {
        [self presentModalViewController:mailViewController animated:YES];
        [mailViewController release];
    }

似乎是什么导致了异常？

4

2 回答 2

2

在setToRecipients你必须指定一个数组，而不是一个字符串。所以你可以通过你的email-array。

于 2011-04-05T10:16:30.003 回答
1 
-(IBAction)btnemail:(id)sender{
MFMailComposeViewController *picker = [[MFMailComposeViewController alloc] init];
picker.mailComposeDelegate = self;

[picker setSubject:@"subject"];
NSString *emailid=btnEmail.titleLabel.text;
NSArray *toRecipients = [NSArray arrayWithObject:emailid];
[picker setToRecipients:toRecipients];

NSString *emailBody = @"";
[picker setMessageBody:emailBody isHTML:NO];

if ([MFMailComposeViewController canSendMail]) {
    [self.parentViewController presentModalViewController:picker animated:YES];
}else {

}
[picker release];

}

于 2011-04-05T10:17:01.590 回答