NSTableView 错误-[__NSCFConstantString setFrame:]答案

【问题标题】：NSTableView error -[__NSCFConstantString setFrame:]NSTableView 错误-[__NSCFConstantString setFrame:]
【发布时间】：2013-05-09 12:39:25
【问题描述】：

全部。当我使用 NSTableView 时，只要在此函数中到达，它就会给我以下错误。

-(id)tableView:(NSTableView *)tableView viewForTableColumn:(NSTableColumn *)tableColumn row:(NSInteger)row{

USBInfor* usbInfor = [_tableContent objectAtIndex:row];
NSString* identifier = [tableColumn identifier];

return [usbInfor valueForKey:identifier];
}

我创建了一个 usbInfor 类来保存 USB 的名称、大小、路径和类型。我将这些变量添加到 _tableContent NSMutableArray 中。

 USBInfor *usbinfor = [[USBInfor alloc]init];
 usbinfor.name = [mountPath substringFromIndex:9];
 usbinfor.path = mountPath;
 usbinfor.size = formattingSize;
 usbinfor.type = type;

 [_tableContent addObject:usbinfor];

我在 xib 文件中创建了 3 列，我命名的每个标识符都与变量名称相同，即名称、路径和大小。

以下是错误：

 2013-05-08 22:56:34.157 TESTING[7760:303] -[__NSCFString setFrame:]: unrecognized      selector sent to instance 0x10022a3d0
 2013-05-08 22:56:34.158 TESTING[7760:303] An uncaught exception was raised
 2013-05-08 22:56:34.159 TESTING[7760:303] -[__NSCFString setFrame:]: unrecognized  selector sent to instance 0x10022a3d0
 2013-05-08 22:56:34.162 TESTING[7760:303] (
0   CoreFoundation                      0x00007fff81e8ab06 __exceptionPreprocess + 198
1   libobjc.A.dylib                     0x00007fff81a003f0 objc_exception_throw + 43
2   CoreFoundation                      0x00007fff81f2140a -[NSObject(NSObject) doesNotRecognizeSelector:] + 186
3   CoreFoundation                      0x00007fff81e7902e ___forwarding___ + 414
4   CoreFoundation                      0x00007fff81e78e18 _CF_forwarding_prep_0 + 232
5   AppKit                              0x00007fff8c456a73 -[NSTableRowData _addViewToRowView:atColumn:row:] + 533
6   AppKit                              0x00007fff8c45666f -[NSTableRowData _addViewsToRowView:atRow:] + 151
7   AppKit                              0x00007fff8c454c05 -[NSTableRowData _addRowViewForVisibleRow:withPriorView:] + 415
8   AppKit                              0x00007fff8c45498a -[NSTableRowData _addRowViewForVisibleRow:withPriorRowIndex:inDictionary:withRowAnimation:] + 272
9   AppKit                              0x00007fff8c453c59 -[NSTableRowData _unsafeUpdateVisibleRowEntries] + 740
10  AppKit                              0x00007fff8c4537f1 -[NSTableRowData updateVisibleRowViews] + 119
11  AppKit                              0x00007fff8c42b87b -[NSTableView viewWillDraw] + 165
12  AppKit                              0x00007fff8c3091ed __22-[NSView viewWillDraw]_block_invoke_0 + 307
13  CoreFoundation                      0x00007fff81e834a6 __NSArrayEnumerate + 582
14  AppKit                              0x00007fff8c308f2d -[NSView viewWillDraw] + 244
15  AppKit                              0x00007fff8c3091ed __22-[NSView viewWillDraw]_block_invoke_0 + 307
16  CoreFoundation                      0x00007fff81e834a6 __NSArrayEnumerate + 582
17  AppKit                              0x00007fff8c308f2d -[NSView viewWillDraw] + 244
18  AppKit                              0x00007fff8c393aa5 -[NSScrollView viewWillDraw] + 45
19  AppKit                              0x00007fff8c3091ed __22-[NSView viewWillDraw]_block_invoke_0 + 307
20  CoreFoundation                      0x00007fff81e834a6 __NSArrayEnumerate + 582
21  AppKit                              0x00007fff8c308f2d -[NSView viewWillDraw] + 244
22  AppKit                              0x00007fff8c3091ed __22-[NSView viewWillDraw]_block_invoke_0 + 307
23  CoreFoundation                      0x00007fff81e834a6 __NSArrayEnumerate + 582
24  AppKit                              0x00007fff8c308f2d -[NSView viewWillDraw] + 244
25  AppKit                              0x00007fff8c308584 -[NSView _sendViewWillDrawInRect:clipRootView:] + 1525
26  AppKit                              0x00007fff8c2d49b1 -[NSView displayIfNeeded] + 1044
27  AppKit                              0x00007fff8c391a48 -[NSWindow _reallyDoOrderWindow:relativeTo:findKey:forCounter:force:isModal:] + 1377
28  AppKit                              0x00007fff8c391068 -[NSWindow _doOrderWindow:relativeTo:findKey:forCounter:force:isModal:] + 940
29  AppKit                              0x00007fff8c390c4f -[NSWindow orderWindow:relativeTo:] + 159
30  AppKit                              0x00007fff8c292266 -[NSIBObjectData nibInstantiateWithOwner:topLevelObjects:] + 1424
31  AppKit                              0x00007fff8c27114d loadNib + 317
32  AppKit                              0x00007fff8c270679 +[NSBundle(NSNibLoading) _loadNibFile:nameTable:withZone:ownerBundle:] + 219
33  AppKit                              0x00007fff8c3c35bc +[NSBundle(NSNibLoading) loadNibFile:externalNameTable:withZone:] + 140
34  AppKit                              0x00007fff8c270398 +[NSBundle(NSNibLoading) loadNibNamed:owner:] + 626
35  AppKit                              0x00007fff8c26ca2f NSApplicationMain + 398
36  TESTING                             0x00000001000012b2 main + 34
37  TESTING                             0x0000000100001264 start + 52
)
 2013-05-08 22:56:34.164 TESTING[7760:303] *** Terminating app due to uncaught  exception 'NSInvalidArgumentException', reason: '-[__NSCFString setFrame:]: unrecognized selector sent to instance 0x10022a3d0'
*** First throw call stack:
(
0   CoreFoundation                      0x00007fff81e8ab06 __exceptionPreprocess + 198
1   libobjc.A.dylib                     0x00007fff81a003f0 objc_exception_throw + 43
2   CoreFoundation                      0x00007fff81f2140a -[NSObject(NSObject) doesNotRecognizeSelector:] + 186
3   CoreFoundation                      0x00007fff81e7902e ___forwarding___ + 414
4   CoreFoundation                      0x00007fff81e78e18 _CF_forwarding_prep_0 + 232
5   AppKit                              0x00007fff8c456a73 -[NSTableRowData _addViewToRowView:atColumn:row:] + 533
6   AppKit                              0x00007fff8c45666f -[NSTableRowData _addViewsToRowView:atRow:] + 151
7   AppKit                              0x00007fff8c454c05 -[NSTableRowData _addRowViewForVisibleRow:withPriorView:] + 415
8   AppKit                              0x00007fff8c45498a -[NSTableRowData _addRowViewForVisibleRow:withPriorRowIndex:inDictionary:withRowAnimation:] + 272
9   AppKit                              0x00007fff8c453c59 -[NSTableRowData _unsafeUpdateVisibleRowEntries] + 740
10  AppKit                              0x00007fff8c4537f1 -[NSTableRowData updateVisibleRowViews] + 119
11  AppKit                              0x00007fff8c42b87b -[NSTableView viewWillDraw] + 165
12  AppKit                              0x00007fff8c3091ed __22-[NSView viewWillDraw]_block_invoke_0 + 307
13  CoreFoundation                      0x00007fff81e834a6 __NSArrayEnumerate + 582
14  AppKit                              0x00007fff8c308f2d -[NSView viewWillDraw] + 244
15  AppKit                              0x00007fff8c3091ed __22-[NSView viewWillDraw]_block_invoke_0 + 307
16  CoreFoundation                      0x00007fff81e834a6 __NSArrayEnumerate + 582
17  AppKit                              0x00007fff8c308f2d -[NSView viewWillDraw] + 244
18  AppKit                              0x00007fff8c393aa5 -[NSScrollView viewWillDraw] + 45
19  AppKit                              0x00007fff8c3091ed __22-[NSView viewWillDraw]_block_invoke_0 + 307
20  CoreFoundation                      0x00007fff81e834a6 __NSArrayEnumerate + 582
21  AppKit                              0x00007fff8c308f2d -[NSView viewWillDraw] + 244
22  AppKit                              0x00007fff8c3091ed __22-[NSView viewWillDraw]_block_invoke_0 + 307
23  CoreFoundation                      0x00007fff81e834a6 __NSArrayEnumerate + 582
24  AppKit                              0x00007fff8c308f2d -[NSView viewWillDraw] + 244
25  AppKit                              0x00007fff8c308584 -[NSView _sendViewWillDrawInRect:clipRootView:] + 1525
26  AppKit                              0x00007fff8c2d49b1 -[NSView displayIfNeeded] + 1044
27  AppKit                              0x00007fff8c391a48 -[NSWindow _reallyDoOrderWindow:relativeTo:findKey:forCounter:force:isModal:] + 1377
28  AppKit                              0x00007fff8c391068 -[NSWindow _doOrderWindow:relativeTo:findKey:forCounter:force:isModal:] + 940
29  AppKit                              0x00007fff8c390c4f -[NSWindow orderWindow:relativeTo:] + 159
30  AppKit                              0x00007fff8c292266 -[NSIBObjectData nibInstantiateWithOwner:topLevelObjects:] + 1424
31  AppKit                              0x00007fff8c27114d loadNib + 317
32  AppKit                              0x00007fff8c270679 +[NSBundle(NSNibLoading) _loadNibFile:nameTable:withZone:ownerBundle:] + 219
33  AppKit                              0x00007fff8c3c35bc +[NSBundle(NSNibLoading) loadNibFile:externalNameTable:withZone:] + 140
34  AppKit                              0x00007fff8c270398 +[NSBundle(NSNibLoading) loadNibNamed:owner:] + 626
35  AppKit                              0x00007fff8c26ca2f NSApplicationMain + 398
36  TESTING                             0x00000001000012b2 main + 34
37  TESTING                             0x0000000100001264 start + 52
)
libc++abi.dylib: terminate called throwing an exception

它必须在 OS X 10.5 和基础 SDK OS X 10.7 下运行

谢谢！！

【问题讨论】：

“它必须在 OS X 10.5 下运行……” 那么你不应该使用基于视图的表格视图。这些是在 Lion (10.7) 中引入的。它们不适用于 Leopard (10.5) 或 Snow Leopard (10.6)。

标签： objective-c macos cocoa nstableview nstablecolumn

【解决方案1】：

方法tableView:viewForTableColumn:row:需要返回一个NSView或者NSView的子类。它看起来像 [usbInfor valueForKey:identifier]，其中标识符是“名称”，返回一个字符串 ([mountPath substringFromIndex:9])。我不知道你想在那里做什么，但这显然是错误的。

【讨论】：

【解决方案2】：

[tableColumn 标识符] 用于标识列名。所以应该是这样的

NSString *filename = [[itemArray1 objectAtIndex:rowIndex] objectForKey:key1a];
NSString *path = [[itemArray1 objectAtIndex:rowIndex] objectForKey:key1b];

NSString *identifier = [tableColumn identifier];
if ([identifier] isEqualToString:@"whatever a column name is"]) {
    return filename;
}

else if ([identifier] isEqualToString:@"whatever a column name is"]) {
    return path;
}

...

【讨论】：