以编程方式更新由Cocoa Bindings控制的TableView [英] Programmatically update a TableView that is governed by Cocoa Bindings

问题描述

我对obj-c和可可很新，所以请与我一起：

I'm fairly new to obj-c and cocoa so please bear with me:

我有一个NSTableView设置了可可绑定，简单的-add -remove等方法由我的nib中的NSArrayController实例提供。我想以编程方式将对象添加到为此控制器（因此为表视图）提供内容的数组，然后相应地更新视图。

I have a NSTableView set up with cocoa bindings which works as expected with the simple -add -remove, etc methods provided by an instance of NSArrayController in my nib. I would like to programmatically add objects to the array that provides content for this controller (and hence for the table view) and then update the view accordingly.

我当前有一个工作方法添加一个新的对象到数组（由NSLog验证），但我不知道如何更新表视图。

I current have a working method for adding a new object to the array (verified by NSLog) but I can't figure out how to update the table view.

因此：我更新绑定的tableview？（即，我已经编程添加对象到我的数组）。 我实际上是在一些视图刷新代码像胶粘代码中的[查看reloadData]，但我想要它与我已经到位的绑定。

So: How do I update the bound tableview? (ie, after I have programmatically added objects to my array). I'm essentially after some view refreshing code like [view reloadData] in glue code, but I want it to work with the bindings I have in place.

还是有这个问题的KVC / KVO相关解决方案？

Or is there a KVC/KVO related solution to this problem?

代码详细信息：
AppController.h

Code Details: AppController.h

@interface AppController : NSObject

@property NSMutableArray *clientsArray;

-(IBAction)addClientFooFooey:(id)sender;

@end

AppController.m init方法未在此处显示）

AppController.m (note, I also have the appropriate init method not shown here)

@implementation AppController
...

-(IBAction)addClientFooFooey:(id)sender{
    [self.clientsArray addObject:[[Client alloc] initWithFirstName: @"Foo" andLastName:@"Fooey"]];

//Need some code to update NSTableView here

}

@end

Client.h只是定义了两个属性：firstName和lastName。我的mainmenu.nib文件中的NSTableView的2列通过绑定到我的AppController实例的数组控制器适当地绑定到这些属性。

Client.h just simply defines two properties: firstName and lastName. The 2 columns of an NSTableView in my mainmenu.nib file are appropriately bound to these properties via an array controller bound to my AppController instance.

在旁注/替代。如何添加功能到现有的NSArrayController方法-add，例如：-addWithFirstName：andLastName，仍然与绑定兼容？

On a side note/as an alternative. How could I add functionality to the existing NSArrayController method -add, ie, something like: -addWithFirstName:andLastName and still have this compatible with bindings?

推荐答案

如果你的数组控制器绑定到 clientsArray ，你有两个主要的选项。

You have two main options for doing this provided your array controller is bound to clientsArray.

第一种方法是只使用数组控制器的 addObject：方法，而不是直接向 clientsArray 。

The first way is to just use the array controller's addObject: method instead of adding objects directly to clientsArray.

另一种方法是保持当前 addClientFooFooey：方法，但用以下两行包装您的现有代码：

The other way is to keep your current addClientFooFooey: method but wrap your existing code with these two lines:

[self willChangeValueForKey：@clientsArray];

[self didChangeValueForKey @clientsArray];

第一个选项是最直接的，但是如果你想要改变数组，由于某种原因，你需要更新数组，直接让KVO知道你在做。

The first option is the most straightforward, but if for some reason you need to update the array directly just let KVO know you are doing it.

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