ViewController.m

#import "ViewController.h"
#import "SubThread.h"
@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.
    
    //注意：顯示創(chuàng)建需要自己管理線程 列如：開啟和關(guān)閉
    //注意：線程間通信，任何對(duì)UI進(jìn)行的操作一定要回到主線程
    
    
    //NSThread四種創(chuàng)建方式.///////
    [self createThread];
    
    //thread配置屬性
//    [self configuration];
    
}

-(void)createThread
{
    //NSThread四種創(chuàng)建方式.///////
    //第一種顯示創(chuàng)建
    NSThread *thread1 = [[NSThread alloc] initWithTarget:self selector:@selector(threadAction) object:nil];
    
    //開啟子線程
    [thread1 start];
    
    //第二種 隱式創(chuàng)建
    //    [NSThread detachNewThreadSelector:@selector(threadAction) toTarget:self withObject:nil];
    
    //第三種 隱式創(chuàng)建
    //    [self performSelectorInBackground:@selector(threadAction) withObject:nil];
    
    //第四種 顯示創(chuàng)建
    //    SubThread *subthread = [[SubThread alloc] init];
    //
    //    [subthread start];

}

//thread配置屬性
-(void)configuration
{
    NSThread *thread2 = [[NSThread alloc] initWithTarget:self selector:@selector(subThreadAct) object:nil];
    
    //設(shè)置線程名字
    thread2.name = @"subThread";
    
    //設(shè)置棧空間 以kb作為單位
    thread2.stackSize = 100;
    
    //設(shè)線程的字典屬性
    [thread2.threadDictionary setObject:@"AFN" forKey:@"identifier"];
    
    //設(shè)置線程優(yōu)先級(jí) 范圍：0.0 - 1.0 默認(rèn)的線程優(yōu)先級(jí)為0.5
    thread2.threadPriority = 1;
    
    //設(shè)置線程優(yōu)先級(jí) 優(yōu)先級(jí)為枚舉值 線程啟動(dòng)前可以設(shè)置該屬性，啟動(dòng)后將無法設(shè)置
    thread2.qualityOfService = NSQualityOfServiceUserInteractive;
    
    //啟動(dòng)線程 一般放在最后
    [thread2 start];
    
    //查看某線程的狀態(tài)
    NSLog(@"executing:%d",thread2.executing);
    
    NSLog(@"finished:%d",thread2.finished);

    NSLog(@"cancelled:%d",thread2.cancelled);

}
//線程實(shí)現(xiàn)的方法
-(void)threadAction
{
    NSLog(@"子線程");
    
    NSLog(@"isMainThread %d",[NSThread isMainThread]);
    
    NSLog(@"isMultiThread %d",[NSThread isMultiThreaded]);
    
    NSLog(@"MainThread %@",[NSThread mainThread]);
    
    NSLog(@"currentThread %@",[NSThread currentThread]);
 
    //退出當(dāng)前線程
    [NSThread exit];
    
    //取消線程的方法
    [[NSThread currentThread] cancel];
}

-(void)subThreadAct
{
    NSLog(@"%@",[NSThread currentThread]);
    
    UIImage *image = [[UIImage alloc] init];
    
    ///////-----線程間通訊的兩種方式------////////
    //在子線程中回調(diào)到主線程執(zhí)行任務(wù)
    [self performSelectorOnMainThread:@selector(backMainThread:) withObject:image waitUntilDone:nil];
    
    [self performSelector:@selector(backMainThread:) onThread:[NSThread mainThread] withObject:image waitUntilDone:nil modes:nil];
    
}

//NSThread 的四種創(chuàng)建方式/線程的實(shí)現(xiàn)方法

屏幕快照 2016-05-03 下午7.38.39.png

//NSThread 配置屬性

屏幕快照 2016-05-03 下午7.42.51.png