我有一个名为tableArray的数组填充的NSTableView。我有一个按钮，应该从数组中删除所选项目。在我的removeItem：方法：
[tableArray removeObjectAtIndex:[tableView selectedRow];
[tableView reloadData];
但我收到错误：
2015-05-13 18:16:45.283 FileShedb1.0[979:303] *** -[__NSArrayM objectAtIndex:]: index 18446744073709551615 beyond bounds [0 .. 0]
2015-05-13 18:16:45.288 FileShedb1.0[979:303] (
0 CoreFoundation 0x00007fff8d35ff56 __exceptionPreprocess + 198
1 libobjc.A.dylib 0x00007fff93119d5e objc_exception_throw + 43
2 CoreFoundation 0x00007fff8d2ed392 -[__NSArrayM objectAtIndex:] + 274
3 FileShedb1.0 0x00000001000028a9 -[MPOMainWindowController tableViewSelectionDidChange:] + 201
4 Foundation 0x00007fff8cca0d0e __-[NSNotificationCenter addObserver:selector:name:object:]_block_invoke_1 + 47
5 CoreFoundation 0x00007fff8d3087ba _CFXNotificationPost + 2634
6 Foundation 0x00007fff8cc8cfc3 -[NSNotificationCenter postNotificationName:object:userInfo:] + 65
7 AppKit 0x00007fff8ab10049 -[NSTableView _sendSelectionChangedNotificationForRows:columns:] + 203
8 AppKit 0x00007fff8aae6b0a -[NSTableView _enableSelectionPostingAndPost] + 425
9 AppKit 0x00007fff8aadcd75 -[NSTableView _tileAndRedisplayAll] + 358
10 FileShedb1.0 0x00000001000027bc -[MPOMainWindowController removeFile:] + 188
11 CoreFoundation 0x00007fff8d34f70d -[NSObject performSelector:withObject:] + 61
12 AppKit 0x00007fff8aaa98ca -[NSApplication sendAction:to:from:] + 139
13 AppKit 0x00007fff8aaa97fe -[NSControl sendAction:to:] + 88
14 AppKit 0x00007fff8aaa9729 -[NSCell _sendActionFrom:] + 137
15 AppKit 0x00007fff8aaa8bec -[NSCell trackMouse:inRect:ofView:untilMouseUp:] + 2014
16 AppKit 0x00007fff8ab28b74 -[NSButtonCell trackMouse:inRect:ofView:untilMouseUp:] + 489
17 AppKit 0x00007fff8aaa77f6 -[NSControl mouseDown:] + 786
18 AppKit 0x00007fff8aa72c98 -[NSWindow sendEvent:] + 6306
19 AppKit 0x00007fff8aa0c3a5 -[NSApplication sendEvent:] + 5593
20 AppKit 0x00007fff8a9a2a0e -[NSApplication run] + 555
21 AppKit 0x00007fff8ac1eeac NSApplicationMain + 867
22 FileShedb1.0 0x00000001000014c2 main + 34
23 FileShedb1.0 0x0000000100001494 start + 52
)
任何人都知道我为什么会收到错误？