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我有一個NSToolbar中的NSComboBox,我希望組合框發送消息到它的數據源和委託。如何獲得NSToolbar中的NSComboBox發送消息到數據源和委託
我的班級採用NSComboBoxDelegate
和NSComboBoxDataSource
協議。我創建這樣
NSRect comboBoxRect = NSMakeRect(0, 0, 175, 20);
NSComboBox *sourceComboBox = [[NSComboBox alloc] initWithFrame:comboBoxRect];
[sourceComboBox setDataSource:self];
[sourceComboBox setDelegate:self];
[sourceComboBox setUsesDataSource:YES];
[sourceComboBox setEditable:NO];
NSToolbarItem *sourceComboBoxItem = [[NSToobarItem alloc] initWithItemIdentifier:@"MyID"];
[sourceComboBoxItem setView:sourceComboBox];
[sourceComboBoxItem setMinSize:NSMakeSize(175*1.2, SEGMENT_HEIGHT)];
[sourceComboBoxItem setMaxSize:NSMakeSize(175*1.2, SEGMENT_HEIGHT)];
[sourceComboBoxItem setDelegate:self];
[sourceComboBoxItem setTag:4];
我也實現了以下數據源和委託方法曾在他們有個破發點我的組合框,但沒有被髮送到那些方法。
- (id)comboBox:(NSComboBox *)aComboBox objectValueForItemAtIndex:(NSInteger)index;
- (NSInteger)numberOfItemsInComboBox:(NSComboBox *)aComboBox;
- (void)comboBoxSelectionDidChange:(NSNotification *)notification;
有關我可能做錯什麼的建議?謝謝。