How to bind the NSMutableArray to ArrayController through xib

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.

回答1:

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

iVar - > demoArray
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 - >

Array Controller Bindings as show in below in the image

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.

回答2:

The steps are as follows (just in case you missed anything):

Add the array controller
Set the Mode of the array controller to Class and add the Class name.
Add the Keys you want to bind

If you are using and View based table view. Do following:

Click the column in your table view (often takes three clicks on the table view)
Check Value in Bindings Inspector
Controller Key: ArrangedObjects and your Model Key Path.
Mark your Static Text in your table view cell.
Bind your Static Text to Table Cell View and your Model Key Path.

Hope it helps!

来源：https://stackoverflow.com/questions/18457346/how-to-bind-the-nsmutablearray-to-arraycontroller-through-xib

标签

objective-c

cocoa

cocoa-bindings