NSOperationQueue

1. Getting Specific Operation Queues
2. Managing Operations in the Queue
3. Managing the Execution of Operations
4. Suspending Operations
5. Configuring the Queue

NSOperationQueue是NSOperation的操作队列，主要用于管理NSOperation子类的执行。NSOperationQueue是按照顺序执行相关NSOperation操作。

1 Getting Specific Operation Queues

/// 获取当前队列
@available(iOS 4.0, *)
public class func currentQueue() -> NSOperationQueue?

/// 获取主队列
@available(iOS 4.0, *)
public class func mainQueue() -> NSOperationQueue

2 Managing Operations in the Queue

/// 添加一个NSOperation
public func addOperation(op: NSOperation)

/// 添加NSOperation组到队列中，并记录是否等待。
///
/// - parameter ops : [NSOperation]
/// - parameter wait : 是否等待其他操作执行完毕
///
/// - returns: void
@available(iOS 4.0, *)
public func addOperations(ops: [NSOperation], waitUntilFinished wait: Bool)

/// 添加block操作到队列中
@available(iOS 4.0, *)
public func addOperationWithBlock(block: () -> Void)

/// 获取所有操作
public var operations: [NSOperation] { get }

/// 队列中的队列数
@available(iOS 4.0, *)
public var operationCount: Int { get }

/// 取消所有队列
public func cancelAllOperations()

/// 阻塞当前线程,直到所有的操作执行完毕
public func waitUntilAllOperationsAreFinished()    

3 Managing the Execution of Operations

/// 队列的级别
@available(iOS 8.0, *)
public var qualityOfService: NSQualityOfService

/// 同时执行的最大操作数
public var maxConcurrentOperationCount: Int

4 Suspending Operations

/// 是否暂停队列
public var suspended: Bool

5 Configuring the Queue

/// 队列名
@available(iOS 4.0, *)
public var name: String?

/// 操作队列的线程
@available(iOS 8.0, *)
unowned(unsafe) public var underlyingQueue: dispatch_queue_t?

 

Appendix

Sample Code

Swift

Related Documentation

NSOperationQueue Class Reference

Concurrency Programming Guide

Simple and Reliable Threading with NSOperation

Revision History

时间	描述
2016-03-09	博文完成

Copyright

CSDN：http://blog.csdn.net/y550918116j

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