Question

我刚开始学习可可编程。我试图构建一个简单的imageviewer。我创建了一个新项目，然后从对象库中添加了一个图像查看器。问题是我得到了一个我甚至无法通过谷歌搜索找到的错误。

2012-04-21 20:36:20.620 ImageViewer[2095:403] An uncaught exception was raised
2012-04-21 20:36:20.621 ImageViewer[2095:403] *** -[NSKeyedUnarchiver decodeObjectForKey:]: cannot decode object of class (IKImageView)
2012-04-21 20:36:20.624 ImageViewer[2095:403] (
    0   CoreFoundation                      0x00007fff83a42fc6 __exceptionPreprocess + 198
    1   libobjc.A.dylib                     0x00007fff89dd3d5e objc_exception_throw + 43
    2   CoreFoundation                      0x00007fff83a42dfa +[NSException raise:format:arguments:] + 106
    3   CoreFoundation                      0x00007fff83a42d84 +[NSException raise:format:] + 116
    4   Foundation                          0x00007fff8b957729 _decodeObjectBinary + 2714
    5   Foundation                          0x00007fff8b95899a -[NSKeyedUnarchiver _decodeArrayOfObjectsForKey:] + 1193
    6   Foundation                          0x00007fff8b92f480 -[NSArray(NSArray) initWithCoder:] + 486
    7   Foundation                          0x00007fff8b9577bb _decodeObjectBinary + 2860
    8   Foundation                          0x00007fff8b956ad6 _decodeObject + 201
    9   AppKit                              0x00007fff8eceac18 -[NSView initWithCoder:] + 1051
    10  Foundation                          0x00007fff8b9577bb _decodeObjectBinary + 2860
    11  Foundation                          0x00007fff8b956ad6 _decodeObject + 201
    12  AppKit                              0x00007fff8eddc106 -[NSWindowTemplate initWithCoder:] + 3998
    13  Foundation                          0x00007fff8b9577bb _decodeObjectBinary + 2860
    14  Foundation                          0x00007fff8b95899a -[NSKeyedUnarchiver _decodeArrayOfObjectsForKey:] + 1193
    15  Foundation                          0x00007fff8b95839b -[NSSet(NSSet) initWithCoder:] + 519
    16  Foundation                          0x00007fff8b9577bb _decodeObjectBinary + 2860
    17  Foundation                          0x00007fff8b956ad6 _decodeObject + 201
    18  AppKit                              0x00007fff8ebed99d -[NSIBObjectData initWithCoder:] + 2099
    19  Foundation                          0x00007fff8b9577bb _decodeObjectBinary + 2860
    20  Foundation                          0x00007fff8b956ad6 _decodeObject + 201
    21  AppKit                              0x00007fff8ebed048 loadNib + 235
    22  AppKit                              0x00007fff8ebec59c +[NSBundle(NSNibLoading) _loadNibFile:nameTable:withZone:ownerBundle:] + 217
    23  AppKit                              0x00007fff8ebec4b7 +[NSBundle(NSNibLoading) loadNibFile:externalNameTable:withZone:] + 141
    24  AppKit                              0x00007fff8ebec3fa +[NSBundle(NSNibLoading) loadNibNamed:owner:] + 364
    25  AppKit                              0x00007fff8ee5f9b3 NSApplicationMain + 398
    26  ImageViewer                         0x00000001087035a2 main + 34
    27  ImageViewer                         0x0000000108703574 start + 52
    28  ???                                 0x0000000000000003 0x0 + 3
)

看起来......我需要链接一个框架，但是cocoa框架已经链接了。

还有其他我需要检查的事情吗？

Answer 1

堆栈跟踪抱怨缺少IKImageView类，它是ImageKit的一部分，而ImageKit又是Quartz框架的一部分。

您需要将Quartz.framework添加到项目中。

Answer 2

- [NSKeyedUnarchiver decodeObjectForKey：]：无法解码类的对象（IKImageView）

您是否已将ImageKit框架添加到项目中？除非您这样做，否则您的应用不会包含定义IKImageView的代码。

许多对象库不起作用

2 个答案: