NSTextView值已更改

Question

我对mac开发很新(来自网络和iOS背景)我无法弄清楚每次NSTextView的值发生变化时我都能得到通知.有任何想法吗？

Answer 1

我刚刚看到你想从NSTextView而不是NSTextField回调

只需添加对象的标题,该标题应该是委托协议

@interface delegateAppDelegate : NSObject <NSApplicationDelegate, NSTextViewDelegate> {
    NSWindow *window;
}

之后你添加一个像这样的方法

-(void)textDidChange:(NSNotification *)notification {
    NSLog(@"Ok");
}

确保已将NSTextView(而非NSScrollView)的委托属性与应接收委托的对象相关联

Answer 2

这是解决方案：

NSTextView *textView = ...;

@interface MyClass : NSObject<NSTextStorageDelegate>
@property NSTextView *textView;
@end

MyClass *myClass = [[MyClass alloc] init];
myClass.textView = textView;
textView.textStorage.delegate = myClass;

@implementation MyClass
- (void)textStorageDidProcessEditing:(NSNotification *)aNotification
{
   // self.textView.string will be the current value of the NSTextView
   // and this will get invoked whenever the textView's value changes,
   // BOTH from user changes (like typing) or programmatic changes,
   // like textView.string = @"Foo";
}
@end