如何通过xib将NSMutableArray绑定到ArrayController [英] How to bind the NSMutableArray to ArrayController through xib

问题描述

我是Cocoa的新人。我显示一个简单的Tableview填充与NSMutableArray绑定到NSArrayController如下

  [_ arrController bind：@contentArraytoObject ：self withKeyPath：@dataArrayoptions：nil]; 
 

这里_arrController是我的NSArrayController的IBoutlet，dataArray是我的NSmutableArray与数据。

当我以编程方式进行绑定时，我可以成功填充Tableview。但我不能通过Interface Builder实现相同的绑定。

我在我的IB中选择ArrayController，去绑定部分，并尝试在控制器部分绑定选择模型键路径作为dataArray.But但是，我的表没有填充数据，其中作为编程我可以轻松实现我的任务。

解决方案

这里有一个例子，可能会帮助你解决这个问题。

1. iVar - > demoArray


2. IBOutlet - > demoArrayController

@interface ExAppDelegate：NSObject

@property（assign）IBOutlet NSWindow * window;

@property（strong）NSMutableArray * demoArray;

@property（strong）IBOutlet NSArrayController * demoArrayController;

@end

下面是同一个类的实现

  @implementation ExAppDelegate 
 @synthesize demoArray; 
 
  - （void）applicationDidFinishLaunching：（NSNotification *）aNotification 
 {
 //在这里插入代码来初始化应用程序
 self.demoArray = [NSMutableArray array]; 
 for（int i = 0; i <= 10; i ++）
 {
 NSMutableDictionary * temp = [NSMutableDictionary dictionary]; 
 [temp setObject：[NSNumber numberWithInt：i] forKey：@number]; 
 [temp setObject：[NSString stringWithFormat：@Demo％d，i] forKey：@demoKey]; 
 [self.demoArray addObject：temp]; 
} 
 [self.demoArrayController rearrangeObjects]; 
} 
 
 @end 
  

现在，UI Bindings - >

1. 数组控制器绑定如下图所示

>

2. 表视图列绑定。

注意：

1。在将对象添加到绑定到数组控制器的数组后，请确保您在数组控制器上调用了rearrangeObjects。

[self.demoArrayController rearrangeObjects] ;

2。在表格视图中，列绑定确保您选中了连续更新值复选框。

我希望这可以解决问题。

I am new to Cocoa . I am displaying a simple Tableview populated with NSMutableArray which is bound to the NSArrayController as follows

[_arrController bind:@"contentArray" toObject:self withKeyPath:@"dataArray" options:nil];

Here _arrController is the IBoutlet to my NSArrayController and dataArray is my NSmutableArray with the data.

I am successful in populating the Tableview when I do the binding programatically. However I am not able to achieve the same binding through the Interface Builder.

I selected ArrayController in my IB , went to binding section,and tried binding under the controller section by selecting the model key path as dataArray.But however , my table is not populated with data , where as programatically I can achieve my task easily. Any help is appreciated.

解决方案

Here is a example which might help you to fix the issue.

1. iVar - > demoArray
2. IBOutlet -> demoArrayController

@interface ExAppDelegate : NSObject

@property (assign) IBOutlet NSWindow *window;

@property (strong) NSMutableArray *demoArray;

@property (strong) IBOutlet NSArrayController *demoArrayController;

@end

Below is the implementation of the same class

@implementation ExAppDelegate
@synthesize demoArray;

- (void)applicationDidFinishLaunching:(NSNotification *)aNotification
{
    // Insert code here to initialize your application
    self.demoArray = [NSMutableArray array];
    for (int i=0 ; i <= 10 ; i++)
    {
        NSMutableDictionary *temp = [NSMutableDictionary dictionary];
        [temp setObject:[NSNumber numberWithInt:i] forKey:@"number"];
        [temp setObject:[NSString stringWithFormat:@"Demo %d",i] forKey:@"demoKey"];
        [self.demoArray addObject:temp];        
    }
    [self.demoArrayController rearrangeObjects];
}

@end

Now, UI Bindings - >

1. Array Controller Bindings as show in below in the image

2. Table View Column bindings.

NOTE:

1. Make sure you are calling the rearrangeObjects on Array Controller after you add the objects to an array which is binded to Array Controller.

[self.demoArrayController rearrangeObjects];

2. In Table View Column Bindings make sure you have checked the check box "Continuously Updates Value".

I Hope this fix the issue.

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