在取消选中绑定的NSTableview列中的复选框时出现问题 [英] Problems when deselecting checkboxes inside bound NSTableview's columns

问题描述

我使用的是这个专案，由 aneesh171 ，它显示了在NSTableView内创建复选框以及如何绑定它们。我是OSX开发的新手，试图了解它是如何工作的。

I am using this project, created by aneesh171 that shows the creation of checkboxes inside NSTableView and how to bind them. I am new to OSX development and trying to understand how it works.

该项目基本上是一个NSTableView的列中绑定到数组控制器的复选框。

The project is basically checkboxes inside a NSTableView's column that is bound to an array controller.

由于某些原因，当我取消选中其中一个复选框时，控制台窗口中会显示以下消息：

For some reason, when I deselect one of those checkboxes, the following messages appear on the console window:

2014-04-03 04:22:55.579 MyApp[5735:303] Error setting value for key path objectValue.selected of object <NSAutounbinder: 0x600000258120 - a nonretaining proxy for <NSTableCellView: 0x60000019f890>> (from bound object <NSButton: 0x60000015efb0>): [<__NSDictionaryI 0x61000006f540> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key selected.
2014-04-03 04:22:55.581 MyApp[5735:303] (
    0   CoreFoundation                      0x00007fff87b3a25c __exceptionPreprocess + 172
    1   libobjc.A.dylib                     0x00007fff8a3f6e75 objc_exception_throw + 43
    2   CoreFoundation                      0x00007fff87b3a038 +[NSException raise:format:arguments:] + 104
    3   AppKit                              0x00007fff927936c5 -[NSBinder _setValue:forKeyPath:ofObject:mode:validateImmediately:raisesForNotApplicableKeys:error:] + 837
    4   AppKit                              0x00007fff92793327 -[NSBinder setValue:forBinding:error:] + 245
    5   AppKit                              0x00007fff92c8b4ee -[NSValueBinder _applyObjectValue:forBinding:canRecoverFromErrors:handleErrors:typeOfAlert:discardEditingCallback:otherCallback:callbackContextInfo:didRunAlert:] + 194
    6   AppKit                              0x00007fff92c8b871 -[NSValueBinder applyDisplayedValueHandleErrors:typeOfAlert:canRecoverFromErrors:discardEditingCallback:otherCallback:callbackContextInfo:didRunAlert:error:] + 621
    7   AppKit                              0x00007fff927c5107 -[NSValueBinder performAction:] + 288
    8   AppKit                              0x00007fff927c4fc5 -[_NSBindingAdaptor _objectDidTriggerAction:bindingAdaptor:] + 133
    9   AppKit                              0x00007fff927531a0 -[NSControl sendAction:to:] + 56
    10  AppKit                              0x00007fff9279fced -[NSCell _sendActionFrom:] + 128
    11  AppKit                              0x00007fff927b96c5 -[NSCell trackMouse:inRect:ofView:untilMouseUp:] + 2316
    12  AppKit                              0x00007fff927b8a97 -[NSButtonCell trackMouse:inRect:ofView:untilMouseUp:] + 487
    13  AppKit                              0x00007fff927b81ad -[NSControl mouseDown:] + 706
    14  AppKit                              0x00007fff92739b48 -[NSWindow sendEvent:] + 11296
    15  AppKit                              0x00007fff926d86e4 -[NSApplication sendEvent:] + 2021
    16  AppKit                              0x00007fff92528b89 -[NSApplication run] + 646
    17  AppKit                              0x00007fff92513913 NSApplicationMain + 940
    18  MyApp                               0x0000000100049132 main + 34
    19  libdyld.dylib                       0x00007fff85ffe5fd start + 1

你能告诉我有什么不对吗？

Can you guys tell me what is wrong?

推荐答案

我更新了项目的git版本。

I updated the git version of the project.

每当你通过值绑定绑定一个控件，然后调用它的getter方法加载价值。而当您尝试修改这些值时，它将尝试调用属性的setter方法。在项目中，字典被硬编码，因此没有设置方法，这就是为什么你得到错误设置值的键路径objectValue.selected。

Whenever you bind a control through value binding, then it calls its getter method to load the values. whereas when you tries to modify these values, it will try to call the setter method of the property. In the project the dictionaries were hardcoded therefore there were no setter method and that is the reason why you got the "Error setting value for key path objectValue.selected".

检查

如果您遇到任何问题，请与我们联系。

Let me know if you face any problems.

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