为什么NSObjectController不更新它绑定的模型属性？

Question

我配置的绑定是这样的：

@property (nonatomic, copy) NSString *name; 
@property (nonatomic, strong) NSObjectController *controller; 

... 

self.controller = [[NSObjectController alloc] initWithContent:nil]; 
[self.controller bind:NSContentObjectBinding toObject:self 
      withKeyPath:@"name" options:nil]; 
[self.controller addObject:@"Hello"]; 

... 

NSTextField *textField = [NSTextField textFieldWithString:nil]; 
[textField bind:NSValueBinding toObject:self.controller 
    withKeyPath:@"content" options:nil]; 

文本字段显示发射后的字符串“Hello”，然后我将其更改为“世界”并回车。然而，只有对象控制器的内容更新：

[controller.content isEqualToString:@"World"]; // YES 
     [self.name isEqualToString:@"World"]; // NO — WHY? 
     [self.name isEqualToString:@"Hello"]; // YES 

那么，如何配置NSObjectController更新其绑定到本地属性？

Answer 1

解决！感谢Jacob Gorban：

self.name = @"Hello"; 
self.controller = [[NSObjectController alloc] initWithContent:nil]; 
[self.controller bind:NSContentObjectBinding toObject:self 
      withKeyPath:@"self" options:nil]; 

... 

NSTextField *textField = [NSTextField textFieldWithString:nil]; 
[textField bind:NSValueBinding toObject:self.controller 
    withKeyPath:@"selection.name" options:nil];