cocoa - NSOutlineView 轮廓 View SelectionDidChange

Question

我的 NSOutlineView OutlineViewSelectionDidChange 方法将不会被调用。我将 NSOutlineViews 委托(delegate)设置为其他方法所在的类，例如

- (BOOL)outlineView:(NSOutlineView *)outlineView isItemExpandable:(id)item

存在。但是在选择项目时不会调用outlineViewSelectionDidChange。有人有想法吗？

Answer 1

此通知有点奇怪，因为它不会自动转发给委托(delegate)。尝试在初始化代码中添加显式注册，如下例所示:

- (void)windowControllerDidLoadNib:(NSWindowController *)aController;
{
    [super windowControllerDidLoadNib:aController];
    NSNotificationCenter * center = [NSNotificationCenter defaultCenter];
    [center addObserver:self
               selector:@selector(outlineViewSelectionDidChange:)
                   name:@"NSOutlineViewSelectionDidChangeNotification"
                 object:outlineView];
}