多线程 NSThread了解

用NSThread创建子线程的3种方法   //  DYFViewController.m //  623-02-pthread // //  Created by dyf on 14-6-23. //  Copyright (c) 2014年 ___FULLUSERNAME___. All rights reserved. //   #import "DYFViewController.h" #import <pthread.h>   @interface DYFViewController ()   @end   @implementation DYFViewController   c语言函数 //void *run(void *data) //{ //    // 1.获取当前的线程 //    NSThread *cThread = [NSThread currentThread]; //    //    // 2.打印线程 //    NSLog(@"%@", cThread); //    //    // 3.h耗时操作 //    for (int i = 0; i < 9999; i++) { //        NSLog(@"%@", cThread); //    } // //    return NULL; //}   - ( IBAction )btnOnClick {      // 1.获取当前的线程      NSThread *cthread = [ NSThread currentThread];            NSThread *mt = [ NSThread mainThread];      // 2.打印线程      NSLog (@ "%@" , cthread);            NSLog (@ "%@" , mt);            // 3.执行一线耗时的操作 ： 创建一套子线程      [ self threadCreate3];     } - ( void )run:( NSString *)parma { //    [NSThread threadPriority]; //    //    [NSThread setThreadPriority:0.55];      // 取值0-1，默认0.5      for ( int i = 0; i < 9999; i++) {          NSLog (@ "%@---------%@" , [ NSThread currentThread], parma);      } }   - ( void )threadCreate5 {      // 分离出的子线程      [ NSThread detachNewThreadSelector: @selector (run:) toTarget: self withObject:@ "2222222" ]; } - ( void )threadCreate4 {      // 分离出的子线程      [ NSThread detachNewThreadSelector: @selector (run:) toTarget: self withObject:@ "2222222" ]; }   /**   *  NSThread创建方式3：隐世线程创建，并且直接（自动）启动   */ - ( void )threadCreate3 {      [ self performSelectorInBackground: @selector (run:) withObject:@ "333333" ]; }   /**   *  创建方式2：创建完线程后自动启动   */ - ( void )threadCreate2 {      // 分离出的子线程      [ NSThread detachNewThreadSelector: @selector (run:) toTarget: self withObject:@ "2222222" ]; }   /**   *  创建方式1：①先创建初始化子线程②再启动   */ - ( void )threadCreate {      NSThread *thread1 = [[ NSThread alloc] initWithTarget: self selector: @selector (run:) object:@ "heheh" ];      thread1.name = @ "thread1" ;      // 开启线程      [thread1 start];            NSThread *thread2 = [[ NSThread alloc] initWithTarget: self selector: @selector (run:) object:@ "heheh" ];      thread2.name = @ "thread2" ;      // 开启线程      [thread2 start];            NSThread *thread3 = [[ NSThread alloc] initWithTarget: self selector: @selector (run:) object:@ "heheh" ];      thread3.name = @ "33" ;      // 开启线程      [thread3 start]; }   @end

 利用NSThread在开发中也不常用，了解即可

   

转载于:https://www.cnblogs.com/Cheetah-yang/p/4664138.html

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