与ARC编译时ImageKit错误和警告

Question

我试图将我的项目转换为ARC，但我在我的项目中使用ImageKit。 ARC重构工具和我自己的手动重构都会在ImageKit头文件中使用ARC生成错误和警告，这些错误和警告已包含在我自己的源文件中。他们看起来像这样：

In file included from /Developer/SDKs/MacOSX10.7.sdk/System/Library/Frameworks/Quartz.framework/Versions/A/Frameworks/ImageKit.framework/Headers/ImageKit.h:9: 
In file included from /Volumes/Macintosh HD/Users/simone/Development/AFController.h:12: 
In file included from /Volumes/Macintosh HD/Users/simone/Development/AFOperation.m:10: 
/Developer/SDKs/MacOSX10.7.sdk/System/Library/Frameworks/Quartz.framework/Versions/A/Frameworks/ImageKit.framework/Headers/IKImageBrowserView.h:176:14: error: the current deployment target does not support automated __weak references [4] 
    IBOutlet __weak NSScroller*     _horizontalScroller; 
      ^
<built-in>:115:31: note: instantiated from: 
#define __weak __attribute__((objc_ownership(weak))) 
          ^
In file included from /Developer/SDKs/MacOSX10.7.sdk/System/Library/Frameworks/Quartz.framework/Versions/A/Frameworks/ImageKit.framework/Headers/ImageKit.h:9: 
In file included from /Volumes/Macintosh HD/Users/simone/Development/AFController.h:12: 
In file included from /Volumes/Macintosh HD/Users/simone/Development/AFOperation.m:10: 
/Developer/SDKs/MacOSX10.7.sdk/System/Library/Frameworks/Quartz.framework/Versions/A/Frameworks/ImageKit.framework/Headers/IKImageBrowserView.h:177:14: error: the current deployment target does not support automated __weak references [4] 
    IBOutlet __weak id       _delegate; 
      ^
<built-in>:115:31: note: instantiated from: 
#define __weak __attribute__((objc_ownership(weak))) 
          ^
In file included from /Developer/SDKs/MacOSX10.7.sdk/System/Library/Frameworks/Quartz.framework/Versions/A/Frameworks/ImageKit.framework/Headers/ImageKit.h:9: 
In file included from /Volumes/Macintosh HD/Users/simone/Development/AFController.h:12: 
In file included from /Volumes/Macintosh HD/Users/simone/Development/AFOperation.m:10: 
/Developer/SDKs/MacOSX10.7.sdk/System/Library/Frameworks/Quartz.framework/Versions/A/Frameworks/ImageKit.framework/Headers/IKImageBrowserView.h:179:11: warning: '__strong' only applies to objective-c object or block pointer types; type here is 'void *' [3] 
    void* __strong        _reserved; 
     ^
In file included from /Developer/SDKs/MacOSX10.7.sdk/System/Library/Frameworks/Quartz.framework/Versions/A/Frameworks/ImageKit.framework/Headers/ImageKit.h:10: 
In file included from /Volumes/Macintosh HD/Users/simone/Development/AFController.h:12: 
In file included from /Volumes/Macintosh HD/Users/simone/Development/AFOperation.m:10: 
/Developer/SDKs/MacOSX10.7.sdk/System/Library/Frameworks/Quartz.framework/Versions/A/Frameworks/ImageKit.framework/Headers/IKImageBrowserCell.h:36:2: error: the current deployment target does not support automated __weak references [4] 
     __weak id     _parent; 
     ^
<built-in>:115:31: note: instantiated from: 
#define __weak __attribute__((objc_ownership(weak))) 
          ^

这就是当我设置我的项目设置为目标10.6。当目标10.7，我只是得到警告：

In file included from /Developer/SDKs/MacOSX10.7.sdk/System/Library/Frameworks/Quartz.framework/Versions/A/Frameworks/ImageKit.framework/Headers/ImageKit.h:9: 
In file included from /Volumes/Macintosh HD/Users/simone/Development/AFController.h:12: 
In file included from /Volumes/Macintosh HD/Users/simone/Development/AFGenerator.m:12: 
/Developer/SDKs/MacOSX10.7.sdk/System/Library/Frameworks/Quartz.framework/Versions/A/Frameworks/ImageKit.framework/Headers/IKImageBrowserView.h:179:11: warning: '__strong' only applies to objective-c object or block pointer types; type here is 'void *' [3] 
    void* __strong        _reserved; 
     ^
In file included from /Developer/SDKs/MacOSX10.7.sdk/System/Library/Frameworks/Quartz.framework/Versions/A/Frameworks/ImageKit.framework/Headers/ImageKit.h:10: 
In file included from /Volumes/Macintosh HD/Users/simone/Development/AFController.h:12: 
In file included from /Volumes/Macintosh HD/Users/simone/Development/AFGenerator.m:12: 
/Developer/SDKs/MacOSX10.7.sdk/System/Library/Frameworks/Quartz.framework/Versions/A/Frameworks/ImageKit.framework/Headers/IKImageBrowserCell.h:37:8: warning: '__strong' only applies to objective-c object or block pointer types; type here is 'void *' [3] 
     void* __strong    _ibCellReserved; 
      ^
In file included from /Developer/SDKs/MacOSX10.7.sdk/System/Library/Frameworks/Quartz.framework/Versions/A/Frameworks/ImageKit.framework/Headers/ImageKit.h:13: 
In file included from /Volumes/Macintosh HD/Users/simone/Development/AFController.h:12: 
In file included from /Volumes/Macintosh HD/Users/simone/Development/AFGenerator.m:12: 
/Developer/SDKs/MacOSX10.7.sdk/System/Library/Frameworks/Quartz.framework/Versions/A/Frameworks/ImageKit.framework/Headers/IKPictureTaker.h:31:11: warning: '__strong' only applies to objective-c object or block pointer types; type here is 'void *' [3] 
    void *__strong _ikReserved; 
     ^
3 warnings generated. 

但我至少可以构建和定位只是ARC 10.7运行时，我的程序。

这是怎么回事？这是正常的吗？或者ImageKit与ARC不兼容？

Answer 1

原来，Xcode 4.2是barfing，因为我直接导入<ImageKit/ImageKit.h>，并且只有ImageKit框架链接在我的代码中。非ARC代码很好，但ARC不喜欢这样。

切换到导入<石英/ Quartz.h >（其还包括ImageKit）和链接整个Quartz框架解决了这个问题。 [更新：看起来你不必链接整个Quartz框架。将导入更改为<Quartz/Quartz.h>并保持直接链接ImageKit。]

这很奇怪。