MFMailComposeViewController仅在iOS 9中引发错误 [英] MFMailComposeViewController throws an error only in iOS 9

问题描述

我无法在没有在iOS 9模拟器中抛出致命错误的情况下打开MFMailComposeViewController。

I can't get MFMailComposeViewController to open without throwing a fatal error in iOS 9 Simulator.

相同的代码（Objective C）在iOS 8.x中完美运行更低但今天我安装了Xcode 7 beta 5，当我在iOS 9模拟器上运行应用程序时，我得到一个标题为MailCompositionService意外退出的对话框，当我查看错误报告时，我看到：

The same code (Objective C) works flawlessly in iOS 8.x and lower but today I installed Xcode 7 beta 5 and when I run the app on iOS 9 Simulator, I get a dialog box titled "MailCompositionService quit unexpectedly" and when I view the error report, I see:

应用程序特定信息：
***由于未捕获的异常'NSInvalidArgumentException'而终止应用程序，原因：' - [__ NSArrayI isEqualToString：]：无法识别的选择器发送到实例0x7fd314280b10'

Application Specific Information: *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSArrayI isEqualToString:]: unrecognized selector sent to instance 0x7fd314280b10'

以NSException类型的未捕获异常终止
abort（）调用
CoreSimulator 179 - 设备：iPhone 6 - 运行时：iOS 9.0（ 13A4325c） - DeviceType：iPhone 6

terminating with uncaught exception of type NSException abort() called CoreSimulator 179 - Device: iPhone 6 - Runtime: iOS 9.0 (13A4325c) - DeviceType: iPhone 6

邮件撰写视图出现时发生错误。它会冻结几秒钟然后出现错误对话框。

The error happens when the mail composition view comes up. It freezes for a few seconds and then the error dialog box comes up.

打开邮件撰写视图的代码是：

The code that opens the mail composition view is:

if ([MFMailComposeViewController canSendMail])
{
    MFMailComposeViewController *picker = [[MFMailComposeViewController alloc] init];
    picker.mailComposeDelegate = self;
    [picker setSubject:@"Comment title"];
    [picker setMessageBody:@"Comment description" isHTML:NO];

    [self.window.rootViewController presentModalViewController:picker animated:YES];
    [picker release];
}

如果知道，在应用程序崩溃之前， mailComposeController：didFinishWithResult：error：使用结果 = MFMailComposeResultCancelled 和错误 = nil 。

If it helps to know, before the app crashes, mailComposeController:didFinishWithResult:error: is called with result = MFMailComposeResultCancelled and error = nil.

我很欣赏有关如何使用的提示找到此错误的原因。谢谢！

I'd appreciate tips on how to find the cause of this error. Thanks!

推荐答案

问题在于模拟器，在真实设备上邮件编辑器工作正常。

The issue is with simulator, on the real device mail composer is working correctly.

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