從Objective-C中的UIApplicationShortcutItem正確實現打開故事板視圖控制器的實現

Question

這是我試圖從情節提要中打開視圖控制器的代碼。 我收到錯誤消息“預期標識符”

UINavigationController controller = [（UINavigationController ）[[mainStoryboard InstantiateViewControllerWithIdentifier：@“ ARViewController”];

有人可以幫忙嗎？

- (void)application:(UIApplication *)application performActionForShortcutItem:(UIApplicationShortcutItem *)shortcutItem completionHandler:(void (^)(BOOL))completionHandler {

NSLog(@"%@", shortcutItem.type);
if ([shortcutItem.type isEqualToString:@"ADD OWN STRING HERE"]) {

    UINavigationController *navigationController = (UINavigationController *)self.window.rootViewController;
    UIStoryboard *mainStoryboard = [UIStoryboard storyboardWithName:@"Main" bundle: nil];
    UINavigationController *controller = [(UINavigationController*)[[mainStoryboard instantiateViewControllerWithIdentifier: @"ARViewController"]];
    [navigationController pushViewController:controller animated:YES];

}
}

@end

Answer 1

您和[和]的數量和位置不匹配（兩個[太多，一個]太多）。 它應該是：

UINavigationController *controller = (UINavigationController*)[mainStoryboard instantiateViewControllerWithIdentifier: @"ARViewController"];