Today Extension

// 主APP，增删改数据，保存到NSUserDefaults    

NSUInteger numberOfItemsSnapshot = MIN(self.mutArray.count, 4);

    NSArray<NSString *> *snapshot = [self.mutArray subarrayWithRange:NSMakeRange(self.mutArray.count - numberOfItemsSnapshot, numberOfItemsSnapshot)];

    NSUserDefaults *groupDefault = [[NSUserDefaults alloc] initWithSuiteName:@"group.com.dcj.DCJExtension"];

    [groupDefault setObject:snapshot forKey:@"TodaySnapshot"];

 

// APP Extension，当用户查看时，加载数据，创建UI

- (void)loadContents

{

    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{

        NSUserDefaults *groupDefaults = [[NSUserDefaults alloc] initWithSuiteName:@"group.com.dcj.DCJExtension"];

        self.contentArray = [groupDefaults objectForKey:@"TodaySnapshot"];

        dispatch_async(dispatch_get_main_queue(), ^{

            if (self.contentArray.count == 0) {

                [self showEmptyPlaceholder];

            }else

            {

                self.bTianJia.hidden = YES;

                self.tableView.hidden = NO;

                self.preferredContentSize = CGSizeMake(0, self.contentArray.count * 44 -1);

                [self.tableView reloadData];

                

            }

        });

    });

}

 

// 在Extension，打开容器APP

[self.extensionContext openURL:[NSURL URLWithString:@"DCJExtension://new_item"] completionHandler:nil];

// 需要在容器APP的info里，做如下配置

// 从Extension，直接到主程序，完成一些事。容器APP在此方法中，响应外部APP或者Extension的打开。

- (BOOL)application:(UIApplication *)app openURL:(NSURL *)url options:(NSDictionary<UIApplicationOpenURLOptionsKey,id> *)options

{

    if ([url.relativeString hasPrefix:@"DCJExtension://new_item"]) {

        [[NSNotificationCenter defaultCenter] postNotificationName:kRequestNewItemNote object:nil];

    }

    return YES;

}

 

参考http://www.jianshu.com/p/bbc6a95d9c54

http://www.cocoachina.com/ios/20170706/19749.html