開源軟件-Selene from linkedIn iOS后臺調(diào)度任務(wù)

Selene 是一個 iOS 庫，用于在后臺調(diào)度任務(wù)的執(zhí)行。

使用：

1) 添加 fetch 后臺模式到你 app 的 Info.plist 文件。

2) 創(chuàng)建一個任務(wù)

任務(wù)必須符合 SLNTaskProtocol。 例如：

@interface?SampleTask:?NSObject
@end
@implementation?SampleTask
+?(NSString?*)identifier?{
??return?NSStringFromClass(self);
}
+?(NSOperation?*)operationWithCompletion:(SLNTaskCompletion_t)completion?{
??NSOperation?*operation?=?[NSBlockOperation?blockOperationWithBlock:^{
????//?Do?some?work?....
????completion(UIBackgroundFetchResultNoData);
??}];
??return?operation;
}
+?(CGFloat)averageResponseTime?{
??return?5.0;
}
+?(SLNTaskPriority)priority?{
??return?SLNTaskPriorityLow;
}
@end

3) 添加任務(wù)類調(diào)度

NSArray?*tasks?=?@[[SomeTask?class]];
//?Run?the?scheduler?every?5?minutes
[SLNScheduler?setMinimumBackgroundFetchInterval:60?*?5];
//?Add?the?tasks
[SLNScheduler?scheduleTasks:tasks];

在應(yīng)用程序委托：

-?(void)application:(UIApplication?*)application?performFetchWithCompletionHandler:(void?(^)(UIBackgroundFetchResult))completionHandler?{
??[SLNScheduler?startWithCompletion:completionHandler];
}