#import <UIKit/UIKit.h>
@interface ViewController1 : UIViewController{NSCondition *_condition;NSThread *_thread_1;NSThread *_thread_2;
}
@end

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/
//  ViewController1.m
//  Thread_demo
//
//  Created by MAC on 13-4-22.
//  Copyright (c) 2013年 李开涌. All rights reserved.
//
#import "ViewController1.h"
@interface ViewController1 ()
@end
@implementation ViewController1
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];if (self) {// Custom initializationself.title=@"多线程NSThread";}return self;
}
- (void)viewDidLoad
{[super viewDidLoad];//创建一个进程锁，实现线程同步_condition=[[NSCondition alloc] init];//创建线程1_thread_1=[[NSThread alloc]initWithTarget:self selector:@selector(run) object:nil];[_thread_1 setName:@"thread_1"];[_thread_1 start];//创建线程2_thread_2=[[NSThread alloc]initWithTarget:self selector:@selector(run) object:nil];[_thread_2 setName:@"thread_2"];[_thread_2 start];}
#pragma mark--线程执行方法
-(void)run{//进程上锁[_condition lock];NSLog(@"运行的线程名：%@",[[NSThread currentThread]name]);if ([[[NSThread currentThread]name] isEqualToString:@"thread_1"]) {NSLog(@"111");NSURL *p_w_picpathUrl_1=[NSURL URLWithString:@"http://t.beauty-soft.net/upload/ceiba20130224_014522_8679.jpg"];NSData *data_1=[NSData dataWithContentsOfURL:p_w_picpathUrl_1];UIImage *p_w_picpath_1=[UIImage p_w_picpathWithData:data_1];UIImageView *p_w_picpathView_1=[[UIImageView alloc] initWithImage:p_w_picpath_1];p_w_picpathView_1.frame=CGRectMake(60, 20, 200, 200);[self.view addSubview:p_w_picpathView_1];[p_w_picpathView_1 release];}else if([[[NSThread currentThread]name] isEqualToString:@"thread_2"]){NSLog(@"222");NSURL *p_w_picpathUrl_2=[NSURL URLWithString:@"http://t.beauty-soft.net/upload/ceiba20120704_121437_3455.jpg"];    NSData *data_2=[NSData dataWithContentsOfURL:p_w_picpathUrl_2];UIImage *p_w_picpath_2=[UIImage p_w_picpathWithData:data_2];UIImageView *p_w_picpathView_2=[[UIImageView alloc] initWithImage:p_w_picpath_2];p_w_picpathView_2.frame=CGRectMake(60, 250, 200, 200);[self.view addSubview:p_w_picpathView_2];[p_w_picpathView_2 release];}//解锁[_condition unlock];}
-(void)dealloc{[_thread_1 release];[_thread_2 release];[_condition release];[super dealloc];
}
- (void)didReceiveMemoryWarning
{[super didReceiveMemoryWarning];// Dispose of any resources that can be recreated.
}
@end

//

//  ViewController2.m
//  Thread_demo
//
//  Created by MAC on 13-4-22.
//  Copyright (c) 2013年 李开涌. All rights reserved.
//
#import "ViewController2.h"
@interface ViewController2 ()
@end
@implementation ViewController2
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];if (self) {// Custom initializationself.title=@"线程队列";}return self;
}
- (void)viewDidLoad
{[super viewDidLoad];// 线程队列管理器，实现线程并行运行_opeartionQueue=[[NSOperationQueue alloc] init];//队列最大同时运行数量[_opeartionQueue setMaxConcurrentOperationCount:1];tags=20;//创建线程1NSInvocationOperation *invocationOpearation_1=[[[NSInvocationOperation alloc] initWithTarget:self selector:@selector(run:) object:@"http://t.beauty-soft.net/upload/ceiba20130224_014522_8679.jpg"] autorelease];//创建线程2NSInvocationOperation *invocationOpearation_2=[[[NSInvocationOperation alloc] initWithTarget:self selector:@selector(run:) object:@"http://t.beauty-soft.net/upload/ceiba20120704_121437_3455.jpg"] autorelease];NSArray *array=@[invocationOpearation_1,invocationOpearation_2];//把程序添加到管理器中[_opeartionQueue addOperations:array waitUntilFinished:YES];
}
-(void)run:(NSString *)p_w_picpathStrinUrl{NSLog(@"%@",[_opeartionQueue operations]);NSLog(@"mainQueue%@",[NSOperationQueue mainQueue]);NSLog(@"i==%i",tags);NSLog(@"urlStr：%@",p_w_picpathStrinUrl);NSURL *url=[NSURL URLWithString:p_w_picpathStrinUrl];NSData *data=[NSData dataWithContentsOfURL:url];UIImage *p_w_picpath=[UIImage p_w_picpathWithData:data];UIImageView *p_w_picpathView=[[[UIImageView alloc] initWithImage:p_w_picpath]autorelease];p_w_picpathView.frame=CGRectMake(60, tags, 200, 200);tags+=200;//通知主线程更新UI[self performSelectorOnMainThread:@selector(updateUI:) withObject:p_w_picpathView waitUntilDone:NO];}
-(void)updateUI:(UIImageView *)p_w_picpathView{[self.view addSubview:p_w_picpathView];}
- (void)dealloc
{[_opeartionQueue release];[super dealloc];
}
- (void)didReceiveMemoryWarning
{[super didReceiveMemoryWarning];// Dispose of any resources that can be recreated.
}
@end

//

显示loadingself.indicator.hidden = NO;[self.indicator startAnimating];//进入异步线程dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{//异步下载图片NSURL * url = [NSURL URLWithString:@"http://anImageUrl"];NSData * data = [NSData dataWithContentsOfURL:url];//网络请求之后进入主线程dispatch_async(dispatch_get_main_queue(), ^{//关闭loading[self.indicator stopAnimating];self.indicator.hidden = YES;if (data) {//显示图片self.p_w_picpathView.p_w_picpath = [UIImage p_w_picpathWithData:data];}});});

//

延迟2秒执行：double delayInSeconds = 2.0;dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, delayInSeconds * NSEC_PER_SEC);dispatch_after(popTime, dispatch_get_main_queue(), ^(void){// code to be executed on the main queue after delay});

dispatch_queue_t custom_queue = dispatch_queue_create(“customQueue”, NULL);dispatch_async(custom_queue, ^{//doing something in custom_queue});dispatch_release(custom_queue);

dispatch_group_t group = dispatch_group_create();dispatch_group_async(group, dispatch_get_global_queue(0,0), ^{// 并行执行的线程一});dispatch_group_async(group, dispatch_get_global_queue(0,0), ^{// 并行执行的线程二});dispatch_group_notify(group, dispatch_get_global_queue(0,0), ^{// 汇总结果});