IOS 多线程-NSThread 和线程状态

 

@interface HMViewController ()
- (IBAction)btnClick;

@end

@implementation HMViewController

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

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


- (IBAction)btnClick {
    // 1.获得当前的线程
    NSThread *current = [NSThread currentThread];
    NSLog(@"btnClick---%@", current);
    
//    NSThread *main = [NSThread mainThread];
//    NSLog(@"btnClick---%@", main);
    
    // 2.执行一些耗时操作 : 创建一条子线程
    [self threadCreate];
}

- (void)run:(NSString *)param
{
    NSThread *current = [NSThread currentThread];
    
    for (int i = 0; i<10000; i++) {
        NSLog(@"%@----run---%@", current, param);
    }
}

/**
 * NSThread的创建方式
 * 隐式创建线程, 并且直接(自动)启动
 */
- (void)threadCreate3
{
    // 在后台线程中执行 === 在子线程中执行
    [self performSelectorInBackground:@selector(run:) withObject:@"abc参数"];
}

/**
 * NSThread的创建方式
 * 创建完线程直接(自动)启动
 */
- (void)threadCreate2
{
    [NSThread detachNewThreadSelector:@selector(run:) toTarget:self withObject:@"我是参数"];
}

/**
 * NSThread的创建方式
 * 1> 先创建初始化线程
 * 2> start开启线程
 */
- (void)threadCreate
{
    NSThread *thread = [[NSThread alloc] initWithTarget:self selector:@selector(run:) object:@"哈哈"];
    thread.name = @"线程A";
    // 开启线程
    [thread start];
    
    NSThread *thread2 = [[NSThread alloc] initWithTarget:self selector:@selector(run:) object:@"哈哈"];
    thread2.name = @"线程B";
    // 开启线程
    [thread2 start];
}
@end

 线程的状态

- (void)viewDidLoad
{
    [super viewDidLoad];
    
    self.thread = [[NSThread alloc] initWithTarget:self selector:@selector(test) object:nil];
    self.thread.name = @"线程A";
}

- (void)test
{
    NSLog(@"test - 开始 - %@", [NSThread currentThread].name);
    
//    [NSThread sleepForTimeInterval:5]; // 阻塞状态
    
//    NSDate *date = [NSDate dateWithTimeIntervalSinceNow:5.0];
//    [NSThread sleepUntilDate:date];
    
    for (int i = 0; i<1000; i++) {
        NSLog(@"test - %d - %@", i, [NSThread currentThread].name);
        
        if (i == 50) {
            [NSThread exit];
        }
    }
    
    NSLog(@"test - 结束 - %@", [NSThread currentThread].name);
}