{　　/*参数1：线程的编号（地址）参数2：线程的属性 NULL nil(oc)参数3：要调用的函数 void *  (*)  (void *)参数4：给要调用的函数传递的参数*///开辟新的线程
    pthread_t ID;NSString *str = @"ls";//__bridge桥接 类型转换（oc - 》c）//MRC 谁创建，谁释放//ARC 自动管理int result = pthread_create(&ID, NULL, demo, (__bridge void *)(str));//result 0 代表成功 其他代表失败if (result == 0) {NSLog(@"成功");}else{NSLog(@"失败");}}
/**pthread调用的函数*/
void * demo(void * param)
{NSString *Str = (__bridge NSString *)(param);//获取当前的代码执行在哪个线程当中，获取当前线程NSLog(@"%@ %@",Str,[NSThread currentThread]);return NULL;
}

{   //创建NSThread *thread = [[NSThread alloc]initWithTarget:self selector:@selector(demo) object:nil];//调用
    [thread start];//    //方式2
    [NSThread detachNewThreadSelector:@selector(demo) toTarget:self withObject:nil];//方式3
    [self performSelectorInBackground:@selector(demo) withObject:nil];//传递参数[self performSelectorInBackground:@selector(demo2:) withObject:@"HM"];}
- (void)demo2:(NSString *)str
{NSLog(@"%@ %@",str,[NSThread currentThread]);
}
/**要调用的方法*/
- (void)demo
{NSLog(@"%@",[NSThread currentThread]);
}

- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{//新建状态NSThread *thread = [[NSThread alloc]initWithTarget:self selector:@selector(demo) object:nil];//就绪状态
    [thread start];//运行状态：系统控制的
    }
- (void)demo
{for (int i = 0; i <20; i++) {if (i == 5) {//阻塞状态//让当前的线程睡一段时间[NSThread sleepForTimeInterval:3];}else if (i == 10){//死亡状态
            [NSThread exit];}NSLog(@"%d",i);}
}

- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{//线程属性//主线程占用的内存空间NSLog(@"%zd",[NSThread currentThread].stackSize/1024);//创建线程1NSThread *thread = [[NSThread alloc]initWithTarget:self selector:@selector(demo) object:nil];//设置线程名称thread.name = @"t1";//设置线程的优先级 参数的取值范围 0-1  0是优先级最低的，1是优先级最高 默认的是0.5[thread setThreadPriority:1.0];[thread start];//创建线程2NSThread *thread2 = [[NSThread alloc]initWithTarget:self selector:@selector(demo) object:nil];//设置线程名称thread2.name = @"t2";[thread2 setThreadPriority:0.0];[thread2 start];//设置线程的优先级不能绝对保证线程优先执行，但是线程被调用的概率提高

}
- (void)demo
{//子线程占用的内存空间NSLog(@"demo  %zd",[NSThread currentThread].stackSize/1024);
//    NSLog(@"%@",[NSThread currentThread]);for (int i = 0; i < 10; i++) {NSLog(@"%d %@",i,[NSThread currentThread].name);}}

#import "ViewController.h"@interface ViewController ()
//总票数
@property(nonatomic,assign)int totalTickets;
@end@implementation ViewController- (void)viewDidLoad {[super viewDidLoad];//设置票数为20self.totalTickets = 20;}
- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{//窗口1 模拟卖票NSThread *thread = [[NSThread alloc]initWithTarget:self selector:@selector(sellTickets) object:nil];thread.name = @"t1";[thread start];//窗口2 模拟卖票
    NSThread *thread2 = [[NSThread alloc]initWithTarget:self selector:@selector(sellTickets) object:nil];thread2.name = @"t2";[thread2 start];
}
/**卖票*/
- (void)sellTickets
{while (YES) {//被加锁的对象
        @synchronized(self) {//查询剩余的票数，判断if (self.totalTickets > 0) {self.totalTickets = self.totalTickets - 1;NSLog(@"剩余%d票 %@",self.totalTickets,[NSThread currentThread].name);}else{NSLog(@"票卖完了，回不了家，走路回家");break;}}}
}

- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{//网络图片下载/*1.不能把耗时操作放到主线程中，开辟新的线程2.刷新ui一定要在主线程
//     http://g.hiphotos.baidu.com/image/pic/item/f31fbe096b63f624cd2991e98344ebf81b4ca3e0.jpg*/NSThread *thread = [[NSThread alloc]initWithTarget:self selector:@selector(downloadImg) object:nil];[thread start];}
/**下载图片*/
- (void)downloadImg
{NSLog(@"downloadImg %@",[NSThread currentThread]);//获取链接地址NSURL *url = [NSURL URLWithString:@"http://g.hiphotos.baidu.com/image/pic/item/f31fbe096b63f624cd2991e98344ebf81b4ca3e0.jpg"];//转化NSData类型NSData *data = [NSData dataWithContentsOfURL:url];//转化成UIImageUIImage *img = [UIImage imageWithData:data];/*参数1：主线程要调用的方法参数2：给调用的方法传递的参数参数3：是否等待当前代码执行完毕再来执行下面的代码*/[self performSelectorOnMainThread:@selector(updataUI:) withObject:img waitUntilDone:YES];NSLog(@"end");}
/**刷新ui ui刷新必须放到主线程里面*/
- (void)updataUI:(UIImage *)img
{NSLog(@"updataUI %@",[NSThread currentThread]);[NSThread sleepForTimeInterval:3];self.HMImageView.image = img;
}