UIActivityViewController-无法理解此内存泄漏 [英] UIActivityViewController - can't understand this memory leak

问题描述

有人可以告诉我为什么以下代码在Instruments中泄漏吗?

Can someone please tell me why the following code is leaking in Instruments?

UIActivityViewController *activityController = [[UIActivityViewController alloc] initWithActivityItems:activityItems applicationActivities:nil];
activityController.excludedActivityTypes = [NSArray arrayWithObjects:@"a",@"b", nil];


[self presentViewController:activityController animated:YES completion:nil];
[activityController release];    

仪器在行上显示泄漏:

activityController.excludedActivityTypes = [NSArray arrayWithObjects:@"a",@"b", nil];

推荐答案

以下方法可以解决问题(__block和完成)

The following should do the trick (__block and completion)

__block UIActivityViewController *activityController = [[UIActivityViewController alloc] initWithActivityItems:activityItems applicationActivities:nil];
activityController.excludedActivityTypes = [NSArray arrayWithObjects:@"a",@"b", nil];

[self presentViewController:activityController animated:YES completion:^{ activityController.excludedActivityTypes=nil; activityController=nil;}];
[activityController release];

另请参见所以

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