letrequest = NSFetchRequest(entityName: "MyEntity") letasync = NSAsynchronousFetchRequest(fetchRequest: request){ (id result)in ifresult.finalResult { //TODO.. } } Swift代码很简洁,并用了尾随闭包语法,看不懂的朋友也不用着急,知道
let async = NSAsynchronousFetchRequest(fetchRequest: request){ (id result) in if result.finalResult { //TODO.. } } let progress = NSProgress(totalUnitCount: 1) progress.becomeCurrentWithPendingUnitCount(1) managedObjectContext?.performBlock{ [unowned self] in let error = NSErrorPointer() async...
5.NSFetchRequest:数据请求; 6.NSEntityDescription:表格实体结构,还需知道.xcdatamodel文件编译后为.momd或者.mom文件。 Core Data的功能 对于KVC和KVO完整且自动化的支持,除了为属性整合KVO和KVC访问方法外,还整合了适当的集合访问方法来处理多值关系; 自动验证属性(property)值; 支持跟踪修改和撤销操作; 关系维护,Co...
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions { [application setMinimumBackgroundFetchInterval:UIApplicationBackgroundFetchIntervalMinimum]; return YES; } - (void)application:(UIApplication *)application performFetchWithCompletionHandler:(void (^)(...
CFHTTPMessage：主要是 HTTP 协议的定义和转换，把每一个请求 request 转换成标准的 HTTP 格式的文本。CFURLConnection：主要是处理请求任务。包括 pthread 线程、CFRunloop、请求队列的管理等等。提供了start、cancel 等等操作的 API。CFHost：负责 DNS，有 CFHostStartInfoResolution 等函数，基于 dns_async_start 和 ...
NSFetchRequest *request = [NSFetchRequest new]; NSEntityDescription *entity = [NSEntityDescription entityForName: @"Person" inManagedObjectContext: context]; [request setEntity: entity]; NSArray *results = [[context executeFetchRequest: request error: &error] copy]; ...
minimumFetchInterval = oneHour #endif settings.fetchTimeout = 5 // 5s remoteConfig.configSettings = settings let defaults: [String: NSObject] = [ ... ] remoteConfig.setDefaults(defaults) self.remoteConfig = remoteConfig } func refresh(force: Bool) async throws { let logger = UnifiedLogging...
CocoaAsyncSocket - 无疑是目前封装得最完善的Socket库了:支持异步TCP/UDP,支持GCD,Objective-C接口封装使用教程。 SocketRocket 一个非常不错的 Objective-C 的Socket 库 AsyncSocket - AsyncSocket。 Socket通信 - 通过AsyncSocket封装的Socket通讯方法,简单实用,通俗易懂,初学者不能错过 。 GCDAsyncSocket - GCDAs...
funcfetchFile(from url:String){// 将 String 转换为 URLguardletfileURL=URL(string:url)else{print("无效的 URL")return}// 创建一个 URL 请求letrequest=URLRequest(url:fileURL)// 创建 URLSessionletsession=URLSession.sharedlettask=session.dataTask(with:request){(data,response,error)in// 错误处理...
// 请求用户授权 func setupAPNs() { let center = UNUserNotificationCenter.current() center.requestAuthorization(options: [.alert, .sound, .badge]) { granted, error in DispatchQueue.main.async { if granted { UIApplication.shared.registerForRemoteNotifications() } print("推送权限状态: \(granted...