ios - UIButtonBarItem 中的 UISegmentedControl

Question

我有一个要显示在 UIToolbar 中的 UISegmentedControl。它出现了，但是点击它并没有调用它应该调用的方法。我错过了什么吗？

代码:

-(void)setupToolbars{
    NSArray *segItemsArray = [NSArray arrayWithObjects: @"List", @"Day", @"Month", nil];
    segmentedControl = [[UISegmentedControl alloc] initWithItems:segItemsArray];
    segmentedControl.selectedSegmentIndex = 2;
    [segmentedControl addTarget:self action:@selector(changeView) forControlEvents:UIControlEventTouchUpInside];//this line should make the segmented control call the correct method
    UIBarButtonItem *segmentedControlButtonItem = [[UIBarButtonItem alloc] initWithCustomView:(UIView *)segmentedControl];
    NSArray *barArray = [NSArray arrayWithObjects: todayButtonItem,flexibleSpace, segmentedControlButtonItem, flexibleSpace, nil];
    [bottomToolbar setItems:barArray];
}
-(void)changeView{
    NSLog(@"changeView");
    ...
}

Answer 1

您想使用 UIControlEventValueChanged 事件，而不是 UIControlEventTouchUpInside 事件。