Create a resident thread on iOS

When a thread is created and it is expected to exist, but often the thread we create is stopped after execution and cannot be reused again, then how to create a thread that will allow him to work again, this time it will need to use the runloop. The following is an example of what I wrote:
#import "LongThreadDemoController.h" @interface Longthreaddemocontroller () @property (nonatomic, strong) Nsthread *    thread; @end @implementation longthreaddemocontroller-(void) viewdidload {[Super viewdidload];    Self.view.backgroundColor = [Uicolor Whitecolor];    Self.title = @ "resident thread Demo";    }-(void) Threadrunlooppoint: (ID) __unused object{NSLog (@ "%@", Nsstringfromselector (_cmd));        @autoreleasepool {[[Nsthread CurrentThread] setname:@ "Changzhuthread"];        Nsrunloop *runloop = [Nsrunloop currentrunloop];        Here the main is to listen to a port, the purpose is to make this Thread does not reclaim [Runloop Addport:[nsmachport Port] Formode:nsdefaultrunloopmode];    [Runloop Run]; }}-(Nsthread *) thread{if (!_thread) {_thread = [[Nsthread alloc] initwithtarget:self selector: @selector (THR        Eadrunlooppoint:) Object:nil];    [_thread start];    } return _thread; }-(void) test{NSLog (@ "%s", __func__);} -(void) Touchesbegan: (Nsset *) touches withevent: (uievent *) event{[sElf Performselector: @selector (test) onThread:self.thread Withobject:nil waituntildone:no modes:@[    Nsdefaultrunloopmode]]; }

　　

Create a resident thread on iOS