xcode NSTextField 没有诸如“编辑已更改”之类的事件？
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No events such as 'Editing did Change' for a NSTextField?
提问by adrianderbaum
When I developed for the iPhone I had multiple events on touch that could be true for a button. (e.g. Editing did Change, Editing did End …)
当我为 iPhone 开发时，我有多个触摸事件，这对于按钮来说可能是正确的。（例如，编辑确实发生了变化，编辑确实结束了……）
Now that I develop for Mac OSX I want my application to recognize multiple events in a NSTextField.
现在我为 Mac OSX 开发，我希望我的应用程序能够识别 NSTextField 中的多个事件。
How to do that? Is there an alternative for the events?
怎么做？活动有替代方案吗？
Thanks!
谢谢！
EDIT: May delegates be the key?
编辑：代表可能是关键吗？
回答by Rob Keniger
You need to set an object as the delegate of your NSTextField. As NSTextFieldis a subclass of NSControl, it will call the -controlTextDidChange:method on your object if you implement it.
您需要将一个对象设置为您的NSTextField. 作为NSTextField的子类NSControl，-controlTextDidChange:如果您实现它，它将在您的对象上调用该方法。
@interface MyObject : NSObject
{
IBOutlet NSTextField* textField;
}
@end
@implementation MyObject
- (void)awakeFromNib
{
[textField setDelegate:self];
}
- (void)controlTextDidChange:(NSNotification *)notification
{
if([notification object] == textField)
{
NSLog(@"The contents of the text field changed");
}
}
@end
