iOS多线程之NSThread

//
// ViewController.m
// iOS多线程之NSThread
//
// Created by yongpengliang on 16/3/7.
// Copyright © 2016年 jerry. All rights reserved.
//

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];

    //创建子线程方法1：手动创建线程，并手动启动
    //线程启动后在未执行完毕前，此处NSThread对象不会释放
    NSThread *thread = [[NSThread alloc] initWithTarget:self selector:@selector(run) object:nil];
    //启动线程
    [thread start];


    //创建子线程方法2：从当前线程分离出一个线程，并自动启动
    [NSThread detachNewThreadSelector:@selector(run) toTarget:self withObject:nil];

    //创建子线程方法3：
    [self performSelectorInBackground:@selector(run) withObject:nil];
}

/** * 子线程的执行代码 */
- (void) run{
    NSLog(@"%@",[NSThread currentThread]);
}

@end

打印结果：
2016-03-07 23:05:19.076 iOS多线程之NSThread[92481:1748616] {number = 2, name = (null)}
2016-03-07 23:05:19.076 iOS多线程之NSThread[92481:1748617] {number = 3, name = (null)}
2016-03-07 23:05:19.076 iOS多线程之NSThread[92481:1748618] {number = 4, name = (null)}