[英]Why does -[NSObjectController selection] return a proxy object?
[英]Why NSObjectController does not update the model property it is bound to?
我这样配置绑定:
@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];
文本字段在启动后显示字符串“ Hello”,然后将其更改为“ World”并单击Return。 但是,仅对象控制器的内容被更新:
[controller.content isEqualToString:@"World"]; // YES
[self.name isEqualToString:@"World"]; // NO — WHY?
[self.name isEqualToString:@"Hello"]; // YES
那么,如何配置NSObjectController
来更新绑定到的本地属性?
解决了! 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];
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