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