Today Extension

1.首先創建一個主體應用程序

2.創建Today Extension程序

給你的TodayExtension起一個名字,建好以後會變成下圖的文件結構

系統默認給你創建了一個storyboard,有好多人喜歡用純代碼開發，沒問題，接下來使用去掉storyboard

刪掉storyboard後打開plist文件，出現下圖

然後將NSExtensionMainStoryboard刪掉，添加NSExtensionPrincipalClass，屬性值爲你創建的類名，這裏是TodayViewController

3.UI佈局和打開app（這都是坑）

@implementation TodayViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view from its nib.
    //    NSExtensionPrincipalClass  NSExtensionMainStoryboard

    if([[UIDevice currentDevice].systemVersion floatValue] > 10.0){
        //最小爲110的高度，這個如果低於110則不改變
        //設置NCWidgetDisplayModeExpanded可以展開摺疊
        //設置NCWidgetDisplayModeCompact只有一種大小
        self.extensionContext.widgetLargestAvailableDisplayMode = NCWidgetDisplayModeExpanded;
    }else{//iOS8 iOS9可以自己設置大小，不建議太大
        self.preferredContentSize = CGSizeMake(0, 50);
    }

    UIButton *openBtn = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 200, 30)];
    openBtn.center = CGPointMake(self.view.bounds.size.width/2.0, 20);
    [openBtn setTitle:@"打開應用程序" forState:(UIControlStateNormal)];
    [openBtn setTitleColor:[UIColor redColor] forState:(UIControlStateNormal)];
    [openBtn addTarget:self action:@selector(openApp) forControlEvents:(UIControlEventTouchUpInside)];
    [self.view addSubview:openBtn];
}

- (void)openApp {

    NSLog(@"打開app");
    [self.extensionContext openURL:[NSURL URLWithString:@"suntodayextension://"] completionHandler:^(BOOL success) {
        if(success){
            NSLog(@"成功");
        }
    }];
}

- (void)viewWillAppear:(BOOL)animated {

    [super viewWillAppear:animated];
    NSLog(@"appear");
    //建議在這裏請求數據
}

- (void)viewWillDisappear:(BOOL)animated {

    [super viewWillDisappear:animated];
    NSLog(@"disapear");
}

- (void)widgetPerformUpdateWithCompletionHandler:(void (^)(NCUpdateResult))completionHandler {
    // Perform any setup necessary in order to update the view.

    // If an error is encountered, use NCUpdateResultFailed
    // If there's no update required, use NCUpdateResultNoData
    // If there's an update, use NCUpdateResultNewData

    completionHandler(NCUpdateResultNewData);
}

//iOS10以後才能調用該方法
- (void)widgetActiveDisplayModeDidChange:(NCWidgetDisplayMode)activeDisplayMode withMaximumSize:(CGSize)maxSize {

    if (activeDisplayMode == NCWidgetDisplayModeExpanded) {//展開模式
        self.preferredContentSize = CGSizeMake(0, 300);
    } else if (activeDisplayMode == NCWidgetDisplayModeCompact) {//摺疊模式
        self.preferredContentSize = maxSize;
    }
}

//iOS10以後左邊不會有空白，該方法也就失去了作用
- (UIEdgeInsets)widgetMarginInsetsForProposedMarginInsets:(UIEdgeInsets)defaultMarginInsets {

    return UIEdgeInsetsZero;
}
@end

點擊打開需要在主體程序添加URL Scheme

然後再Today Extension項目的時間添加如下代碼

[self.extensionContext openURL:[NSURL URLWithString:@"suntodayextension://"] completionHandler:^(BOOL success) {
        if(success){
            NSLog(@"成功");
        }
}];

在主體程序的AppDelegate.m文件中添加如下代碼

-(BOOL)application:(UIApplication *)application openURL:(NSURL *)url sourceApplication:(NSString *)sourceApplication annotation:(id)annotation{

    if([url.absoluteString hasPrefix:@"suntodayextension://"] == YES){

        //跳轉操作
        UIViewController *vc = [[UIViewController alloc] init];
        vc.view.backgroundColor = [UIColor redColor];
        [application.keyWindow.rootViewController presentViewController:vc animated:YES completion:NULL];
    }
    return YES;
}

4.共享數據

這個需要創建一個group的id

然後在主體app和today extension設置一下

然後開始共享數據，這裏使用NSUserDefault

//添加共享數據
NSUserDefaults *userDefault = [[NSUserDefaults alloc] initWithSuiteName:@"group.com.sun.appextension"];
[userDefault setValue:@"123" forKey:@"shareData"];
[userDefault synchronize];

//讀取共享數據
NSUserDefaults *userDefault = [[NSUserDefaults alloc] initWithSuiteName:@"group.com.sun.appextension"];
NSLog(@"%@",[userDefault objectForKey:@"shareData"]);

Demo地址