Question

嗨，谢谢你。

我有一个我写的应用程序，它使用3D触摸在主屏幕上使用新的UIApplicationShortcut。应用程序是应用程序后，快捷方式可以正常工作，但如果应用程序关闭，则快捷方式在主屏幕上不起作用。

当应用程序关闭时，快捷方式会启动应用程序，但快捷方式不起作用，只会启动应用程序。

这是我用于快捷方式的两种方法。

- (void)setupViewControllers {
    // setup the navigation stack

    CGSize iOSDeviceScreenSize = [[UIScreen mainScreen] bounds].size;
    if (iOSDeviceScreenSize.height == 480)
    {
        _navigationController = (UINavigationController *)self.window.rootViewController;

        // iPhone 5 and iPod Touch 5th generation: 4 inch screen
        // Instantiate a new storyboard object using the storyboard file named Storyboard_iPhone4
        UIStoryboard *iPhone4Storyboard = [UIStoryboard storyboardWithName:@"Main4s" bundle:nil];

        UIViewController *initialViewController = [iPhone4Storyboard instantiateInitialViewController];
        self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];

        self.window.rootViewController  = initialViewController;

        self.myViewController = (ViewController *)_navigationController.topViewController;
        self.myViewController.managedObjectContext = self.managedObjectContext;

        [self.window makeKeyAndVisible];
    }

    if (iOSDeviceScreenSize.height == 568)
    {
        _navigationController = (UINavigationController *)self.window.rootViewController;

        // iPhone 5 and iPod Touch 5th generation: 4 inch screen
        // Instantiate a new storyboard object using the storyboard file named Storyboard_iPhone4
        UIStoryboard *iPhone4Storyboard = [UIStoryboard storyboardWithName:@"Main" bundle:nil];

        UIViewController *initialViewController = [iPhone4Storyboard instantiateInitialViewController];
        self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];

        self.window.rootViewController  = initialViewController;

        self.myViewController = (ViewController *)_navigationController.topViewController;
        self.myViewController.managedObjectContext = self.managedObjectContext;

        [self.window makeKeyAndVisible];
    }

    if (self.myViewController){NSLog(@"myViewController is not nil, setupViewControllers");}
    else
    {
        NSLog(@"myViewController is nil, setupViewControllers");//breakpoint inserted here...
    }
}

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

    [self setupViewControllers];

    // react to shortcut item selections
    NSLog(@"A shortcut item was pressed. It was %@.", shortcutItem.localizedTitle);
    if([shortcutItem.localizedTitle isEqualToString:@"Scan Tag"])
    {
        [self.myViewController toggleScanningTapped:nil];
    }
    if([shortcutItem.localizedTitle isEqualToString:@"Enter Tag"])
    {
        [self.myViewController manualEntry];
    }
    if([shortcutItem.localizedTitle isEqualToString:@"Search for a Tag"]){
        [self.myViewController SearchSwitch];
        [self.myViewController toggleScanningTapped:nil];
    }
    if([shortcutItem.localizedTitle isEqualToString:@"Just Scan & Copy"]){
        [self.myViewController justCopy];
    }

    if (self.myViewController){NSLog(@"myViewController is not nil, performActionForShortcutItem");}
    else
    {
        NSLog(@"myViewController is nil, performActionForShortcutItem");
    }
}


- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    // Override point for customization after application launch.

    [self setupViewControllers];

    NSURL *url = (NSURL *)[launchOptions valueForKey:UIApplicationLaunchOptionsURLKey];
    if (url != nil && [url isFileURL]) {
        [self.myViewController handleOpenURL:url];
    }

    if (self.myViewController){NSLog(@"myViewController is not nil, didFinishLaunchingWithOptions");}
    else{NSLog(@"myViewController is nil, didFinishLaunchingWithOptions");}

    return YES;
}

这是plist条目...

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE plist PUBLIC "-//Apple//DTD PLIST 1.0//EN" "http://www.apple.com/DTDs/PropertyList-1.0.dtd">
<plist version="1.0">
<array>
    <dict>
        <key>UIApplicationShortcutItemType</key>
        <string>com.PALIANTech.SUNYScanner.static1</string>
        <key>UIApplicationShortcutItemTitle</key>
        <string>Scan Tag</string>
        <key>UIApplicationShortcutItemSubtitle</key>
        <string>Add tag to DB</string>
        <key>UIApplicationShortcutItemIconFile</key>
        <string>barcode.png</string>
    </dict>
    <dict>
        <key>UIApplicationShortcutItemType</key>
        <string>com.PALIANTech.SUNYScanner.static2</string>
        <key>UIApplicationShortcutItemTitle</key>
        <string>Enter Tag</string>
        <key>UIApplicationShortcutItemSubtitle</key>
        <string>Manually add tag to DB</string>
        <key>UIApplicationShortcutItemIconFile</key>
        <string>ManualEntry.png</string>
    </dict>
    <dict>
        <key>UIApplicationShortcutItemType</key>
        <string>com.PALIANTech.SUNYScanner.static3</string>
        <key>UIApplicationShortcutItemTitle</key>
        <string>Search for a Tag</string>
        <key>UIApplicationShortcutItemSubtitle</key>
        <string>Scan a tag to search for</string>
        <key>UIApplicationShortcutItemIconFile</key>
        <string>search.png</string>
    </dict>
</array>
</plist>

非常感谢任何帮助或建议。

Answer 1

原因是，当您检查self.myViewController和nil中的快捷项目时，当您的应用刚刚开始performActionForShortcutItem时，didFinishLaunchingWithOptions仍然是myViewController。没有任何反应。

要解决此问题，您必须实例化@interface AppDelegate () @property ViewController *viewController; @end @implementation AppDelegate - (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { // Override point for customization after application launch. [self setupViewControllers]; return YES; } - (void)setupViewControllers { self.viewController = [[ViewController alloc] init]; self.viewController.view.backgroundColor = [UIColor lightGrayColor]; self.viewController.label.text = @"Normal Launch"; UINavigationController *navigationController = [[UINavigationController alloc] initWithRootViewController:self.viewController]; self.window.rootViewController = navigationController; [self.window makeKeyAndVisible]; } - (void)application:(UIApplication *)application performActionForShortcutItem:(UIApplicationShortcutItem *)shortcutItem completionHandler:(void (^)(BOOL))completionHandler { [self setupViewControllers]; if([shortcutItem.localizedTitle isEqualToString:@"Scan Tag"]) { self.viewController.label.text = @"Shortcut: Scan Tag"; } if([shortcutItem.localizedTitle isEqualToString:@"Enter Tag"]) { self.viewController.label.text = @"Shortcut: Enter Tag"; } if([shortcutItem.localizedTitle isEqualToString:@"Search for a Tag"]) { self.viewController.label.text = @"Shortcut: Search Tag"; } if([shortcutItem.localizedTitle isEqualToString:@"Just Scan & Copy"]) { self.viewController.label.text = @"Shortcut: Scan & Copy Tag"; } } @end并在通过快捷方式打开应用程序时将其添加到导航堆栈。

修改

这是一个（剥离的）版本：

<强>的AppDelegate

ViewController

UIViewController类是一个普通的- (void)setupViewControllers { UIStoryboard *storyboard = [UIStoryboard storyboardWithName:@"Main" bundle:nil]; self.viewController = (ViewController *)[storyboard instantiateViewControllerWithIdentifier:@"ViewController"]; ... }子类，只有一个标签用于演示目的。

我已经使用处于后台的应用程序测试了快捷方式，并且应用程序已完全从内存中删除。两者都按预期工作。

<强>更新

如果您正在使用故事板中的ViewController，则必须按如下方式初始化它：

myfunc<-function(X, a = 100, b = 10){ if (a > nrow(X)) stop("a can't be greater than number of matrix rows") if (b > ncol(X)) stop("b can't be greater than number of matrix columns") return("Success!") }

不要忘记在故事板中设置ViewController的标识符：

应用程序关闭时，3D Touch UIapplicationShortcut不起作用

1 个答案: