ios - PopOver 和 UIStoryboardPopoverSegue 类奇怪的行为

Question

基于 uitableviewcell 选择，我执行 segue。我在下面粘贴了我的准备 segue 代码。就目前而言，代码似乎运行良好。但是，当我移动线路时

currentSelectionPopOver = [(UIStoryboardPopoverSegue *)segue popoverController];

直接在 [destList setDelegate:self] 之后；声明，我设置我的 destList 属性的 if 语句似乎在加载视图时没有使用。想法？只是对行为感到好奇。

   - (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {



    if([segue.identifier isEqualToString:@"showSelectionList"]) {

        //the destination view controller displays the data
        SelectionListController *destList = segue.destinationViewController;
        [destList setDelegate:self];


        //Set the type of selection list to show.
        if(tagThatRequestedSelectionList == TAG_OFFSET + STATE) {
            DLog()
            [destList setRequestType:STATES_LIST];
        }//end if.

        if(tagThatRequestedSelectionList == TAG_OFFSET + CITY) {
            DLog();
            [destList setRequestType:CITY_LIST];
        }//end if.

        //Setup a pointer to the popover controller so it can be dismissed.
        currentSelectionPopOver = [(UIStoryboardPopoverSegue *)segue popoverController];    
     }
     }//end prepare.