Swift's detailed------------nsthread thread sync lock

Nsthread Thread Sync Lock

The above section uses Nsthread to realize the reading of the network picture, which NSThread simulates a ticket selling example. Use NSLock or NSCondition lock resources

var100//总票数    var0  //窗口1卖出票数    var0   //窗口2卖出票数    vartrue  //是否出售    varlock:NSLock?       var condition:NSCondition?

Here we first define some variables

Then click on the ticket to open a thread to imitate the window

 lock = NSLock()        condition = NSCondition()        //setTicketValue()        NSThreadself"run"nil)        thread1.name"thread-1"        thread1.start()        NSThreadself"run"nil)        thread2.name"thread-2"        thread2.start()

Func run () { while(IsSell) {lock?. Lock()if(total>0){Nsthread. Sleepfortimeinterval(0.2); total--if(Nsthread. CurrentThread(). Name=="Thread-1") {w1++}Else if(Nsthread. CurrentThread(). Name=="Thread-2") {w2++}Dispatch_async(Dispatch_get_main_queue ()) { Self. Setticketvalue()                }            }Else{Dispatch_async(Dispatch_get_main_queue ()) { Self. Totalticks. Text="The tickets are sold out."                     Self. IsSell=false}} lock?. Unlock()        }    }

This is probably a small example.
Source code: Source Code

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Swift's detailed------------nsthread thread sync lock