同步,异步,串行,并行队列

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    //[self testSyncWithSerialQueue];
    //[self testSyncWithConcurrentQueue];
    //[self testAsyncWithSerialQueue];
    [self testAsyncWithConcurrentQueue];
}



//1.同步方式向串行队列提交代码
//前面的线程执行完成后,才开始执行后面的线程
-(void)testSyncWithSerialQueue
{
    //创建串行队列
    dispatch_queue_t serialQueue = dispatch_queue_create("serialQueue", DISPATCH_QUEUE_SERIAL);
    
    //线程一
    dispatch_sync(serialQueue, ^{
        for (int i=0; i<100; i++) {
            NSLog(@"线程一:%d",i);
        }
    });
    
    //线程二
    dispatch_sync(serialQueue, ^{
        for (int i=0; i<100; i++) {
            NSLog(@"线程二:%d",i);
        }
    });
}

//2.同步方式向并行队列提交代码
//前面的线程执行完成后.才开始执行后面的线程
-(void)testSyncWithConcurrentQueue
{
    //创建并行的队列
    dispatch_queue_t conQueue = dispatch_queue_create("conQueue", DISPATCH_QUEUE_CONCURRENT);
    
    //线程一
    dispatch_sync(conQueue, ^{
        for (int i=0; i<100; i++) {
            NSLog(@"线程一:%d",i);
        }
    });
    
    //线程二
    dispatch_sync(conQueue, ^{
        for (int i=0; i<100; i++) {
            NSLog(@"线程二:%d",i);
        }
    });
}

//3.异步方式向串行队列提交代码
//前面的线程执行完成后,才开始执行后面的线程
-(void)testAsyncWithSerialQueue
{
    //创建串行队列
    dispatch_queue_t serialQueue = dispatch_queue_create("serialQueue", DISPATCH_QUEUE_SERIAL);
    
    //线程一
    dispatch_async(serialQueue, ^{
        for (int i=0; i<100; i++) {
            NSLog(@"线程一:%d",i);
        }
    });
    
    //线程二
    dispatch_async(serialQueue, ^{
        for (int i=0; i<100; i++) {
            NSLog(@"线程二:%d",i);
        }
    });
}

//3.异步方式向并行队列提交代码
//前面的线程执行和后面的线程同时执行
-(void)testAsyncWithConcurrentQueue
{
    //创建并行队列
    dispatch_queue_t conQueue = dispatch_queue_create("conQueue", DISPATCH_QUEUE_CONCURRENT);
    
    //线程一
    dispatch_async(conQueue, ^{
        for (int i=0; i<100; i++) {
            NSLog(@"线程一:%d",i);
        }
    });
    
    //线程二
    dispatch_async(conQueue, ^{
        for (int i=0; i<100; i++) {
            NSLog(@"线程二:%d",i);
        }
    });
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end