Multi-threaded creation in the UI and asynchronous loading of timers and pictures

-(void) Viewdidload {

[super viewdidload];

    _imgview = [[ Uiimageview alloc : self . View Bounds

_imgview. Contentmode =  Uiviewcontentmodescaleaspectfit;

[Self. View addsubview:_imgview];

Additional setup after loading the view, typically from a nib.

Method 1

Nsthread *thread = [[Nsthread alloc]initwithtarget:self selector: @selector (test) Object:nil];

[Thread start];

//

Method 2

[Self performselectorinbackground: @selector (Test) Withobject:nil];

Method 3

[Nsthread detachnewthreadselector: @selector (Test) totarget:self Withobject:nil];

method 4 Nsoperationqueue is an operation queue or thread pool

nsoperationqueue *queue = [[nsoperationqueue alloc]init] ;

//queue.maxconcurrentoperationcount = 1;

[Queue addoperationwithblock:^{// adds an action to the queue

[Self test];

//    }];

method 5 do not go directly to create the Nsoperation object

    nsinvocationoperation *opertion = [[ nsinvocationoperation " initwithtarget : self : @selector (test) object : nil

opertion.queuepriority = Nsoperationqueuepriorityverylow;

//

Nsinvocationoperation *opertion2 = [[nsinvocationoperation alloc]initwithtarget:self selector: @selector (test1) Object:nil];

opertion2.queuepriority = Nsoperationqueuepriorityveryhigh;

//

// method 6

Threadoperation *threadoperation = [[Threadoperation alloc]init];

[Queue addoperation:threadoperation];

[Queue addoperation: opertion];

[Queue Addoperation:opertion2];

BOOL bool1 = [[Nsthread currentthread]ismainthread];

NSLog (@ "Bool1 is%d", bool1);

for (int i = 0; i <; i + +) {

NSLog (@ "-----------------main%d", i);

//    }

}

-(void) test{

@autoreleasepool {

//[Nsthread sleepfortimeinterval:5];

BOOL bool2 = [[Nsthread currentthread]ismainthread];

NSLog (@ "Bool2 is%d", bool2);

for (int i = 0; i <; i + +) {

NSLog (@ "-----------------test%d", i);

//    }

[Nstimer scheduledtimerwithtimeinterval:1 target:self selector: @selector (run:) Userinfo:nil Repeats:yes];

Nstimer *timer = [Nstimer timerwithtimeinterval:1 target:self selector: @selector (run:) Userinfo:nil Repeats:yes];

[[Nsrunloop Currentrunloop] Addtimer:timer Formode:nsdefaultrunloopmode];

//

[[Nsrunloop Currentrunloop]run];

  /*

http://d.hiphotos.baidu.com/image/w%3D310/sign=897718c6bd096b63811958513c328733/ Ac345982b2b7d0a28fc5db74c8ef76094a369acf.jpg

*/

//NSLog (@ "1");

nsstring *imgurl = @ "Http://g.hiphotos.baidu.com/image/w%3D310/sign=2c97ee80d03f8794d3 Ff4e2fe21a0ead/f636afc379310a550dcbd3ccb34543a98226101e.jpg ";

nsdata *data = [nsdata datawithcontentsofurl: [NSURL urlwithstring: Imgurl]];

//_imgview.image = [UIImage imagewithdata:data];

[ self performselectoronmainthread:@selector(show:) Withobject:d ata waituntildone:NO];

}

}

-(void) Run: (nstimer *) timer{

}

-(void) Show: (nsdata *) data{

_imgview. image = [UIImage imagewithdata:d ATA];

}

-(void) test1{

[Nsthread Sleepfortimeinterval:5];

BOOL bool2 = [[Nsthread currentthread]ismainthread];

NSLog (@ "Bool2 is%d", bool2);

for (int i = 0; i <; i + +) {

NSLog (@ "-----------------test111111%d", i);

//    }

//}

Multi-threaded creation in the UI and asynchronous loading of timers and pictures