objective-c - 打开和关闭 UIPickerController 时发生内存泄漏

Question

这听起来可能是个新手问题，但我是 iOS 开发新手。

我有以下代码。

- (void) onUploadButtonClick
{
    UIImagePickerController* imgPicker = [[UIImagePickerController alloc] init];
    [[[UIApplication sharedApplication] keyWindow] setRootViewController:imgPicker];
    imgPicker.delegate = self;
    imgPicker.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;
    imgPicker.allowsEditing = NO;
    [self presentModalViewController:imgPicker animated:YES];
    [imgPicker release];
}

我正在运行应用程序并分析内存泄漏，因此只需单击按钮并关闭它，而不执行任何操作，我就会发生内存泄漏。我在模拟器上运行它。

知道为什么会这样吗？

更新:从探查器的控制台泄漏信息泄漏的对象，# 地址大小 负责的库 负责的框架

Malloc 32.50 KB,3   < multiple >    99840   MusicLibrary    MemNewPtrClear
 Malloc 32.50 KB,   0xa083800   33280   MusicLibrary    MemNewPtrClear
 Malloc 32.50 KB,   0x7840a00   33280   MusicLibrary    MemNewPtrClear
 Malloc 32.50 KB,   0x7806a00   33280   MusicLibrary    MemNewPtrClear


Leaked Object,# Address Size    Responsible Library Responsible Frame
Malloc 32.50 KB,    0xa083800   33280   MusicLibrary    MemNewPtrClear


Leaked Object,# Address Size    Responsible Library Responsible Frame
Malloc 32.50 KB,    0x7840a00   33280   MusicLibrary    MemNewPtrClear


Leaked Object,# Address Size    Responsible Library Responsible Frame
Malloc 32.50 KB,    0x7806a00   33280   MusicLibrary    MemNewPtrClear


Leaked Object,# Address Size    Responsible Library Responsible Frame
Malloc 128.00 KB,   0x128de000  131072  MusicLibrary    ReadITImageDB

Answer 1

为什么你会用 UIImagePickerController 做这样的事情？你实际上是在杀死你真正的 rootViewController。

 [[[UIApplication sharedApplication] keyWindow] setRootViewController:imgPicker];

只需删除这一行，一切都会正常进行。