多线程

UIview只能在主线程里

自定义一个线程时要重写-  （void）main

添加到非主队列里的操作都并发执行，且都在子线程





//

//  ViewController.m

//  ThreadApp

//

//  Created by apple on 14-9-11.

//  Copyright (c) 2014年 戴维营教育. All rights reserved.

//



#import "ViewController.h"



@interface ViewController ()



- (IBAction)didClick:(id)sender;

@property (weak, nonatomic) IBOutlet UILabel *label;

@end



@implementation ViewController



- (void)viewDidLoad {

    [super viewDidLoad];

    

//    [self download:nil];

}



- (void)didReceiveMemoryWarning {

    [super didReceiveMemoryWarning];

    // Dispose of any resources that can be recreated.

}



//1. 线程有独立的栈空间

//2. 执行顺序随机

- (IBAction)didClick:(id)sender {

    static int i = 0;

    

//    [NSThread sleepForTimeInterval:10];

    

    i++;

    [self performSelectorInBackground:@selector(download:) withObject:@(i)];

    i++;

    

    //***

    [self performSelectorInBackground:@selector(download:) withObject:@(i)];

    

//    [NSURLConnection sendAsynchronousRequest:<#(NSURLRequest *)#> queue:<#(NSOperationQueue *)#> completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {

//        <#code#>

//    }];

}



- (void)download:(id)object

{

//    NSLog(@"----starting----");

//    NSData *data = [NSData dataWithContentsOfURL:[NSURL URLWithString:@"http://class.room/tinghai.mp3"]];

//    NSLog(@"%lu", data.length);

    

    for (int i = 0; i < 100000; i++) {

        NSLog(@"%@: %d", object, i);

        

//        _label.text = [NSString stringWithFormat:@"%d", i];

        

        NSString *str = [NSString stringWithFormat:@"%d", i];

        //在主线程中执行setText方法

        //*******

//        [_label performSelectorOnMainThread:@selector(setText:) withObject:str waitUntilDone:YES];

//        [self performSelectorOnMainThread:@selector(setText:) withObject:str waitUntilDone:YES];

        

        [self performSelector:@selector(setText:) onThread:[NSThread mainThread] withObject:str waitUntilDone:YES modes:@[NSDefaultRunLoopMode]];

        NSLog(@"....");

    }

}



- (void)setText:(NSString *)text

{

    _label.text = text;

    

    //****

    NSLog(@"%@", [NSThread isMainThread]?@"Main Thread":@"Not Main Thread");

}

@end





//

//  ViewController.m

//  ThreadApp2

//

//  Created by apple on 14-9-11.

//  Copyright (c) 2014年 戴维营教育. All rights reserved.

//



#import "ViewController.h"



#import "MyThread.h"

#import "Downloader.h"



@interface ViewController ()



@end



@implementation ViewController



- (void)viewDidLoad {

    [super viewDidLoad];

    

    //1. 创建子线程

//    [self performSelectorInBackground:<#(SEL)#> withObject:<#(id)#>];

    

    //2. 创建了一个新的子线程

//    [NSThread detachNewThreadSelector:@selector(print) toTarget:self withObject:nil];

    

    //3. 通过创建NSThread对象的方式实现多线程

//    NSThread *thread = [[NSThread alloc] initWithTarget:self selector:@selector(print) object:nil];

//    [thread start];

//    [thread cancel];

    

    //4. 继承NSThread

//    MyThread *thread = [[MyThread alloc] init];

//    [thread start];

    

    Downloader *downloader = [[Downloader alloc] init];

    downloader.path = @"http://class.room/tinghai.mp3";

    downloader.completionHandler = ^(NSData *data){

        NSLog(@"download completion: %lu", data.length);

        NSLog(@"%@", [NSThread isMainThread]?@"Main":@"Not");

    };

    [downloader start];

}



- (void)print

{

    NSLog(@"%@", [NSThread isMainThread]?@"Main":@"Not Main");

}



- (void)didReceiveMemoryWarning {

    [super didReceiveMemoryWarning];

    // Dispose of any resources that can be recreated.

}



@end



//操作线程

//

//  ViewController.m

//  NSOperation-0911

//

//  Created by apple on 14-9-11.

//  Copyright (c) 2014年 apple. All rights reserved.

//



#import "ViewController.h"



@interface ViewController ()



@end



@implementation ViewController



- (void)viewDidLoad {

    [super viewDidLoad];

    //默认为主线程

//    NSInvocationOperation *invOper=[[NSInvocationOperation alloc]initWithTarget:self selector:@selector(print:) object:nil];

//    [invOper start];

    

    

    //fangfaQianMing

//    NSMethodSignature *methSignt=[self methodSignatureForSelector:@selector(print:obj2:)];

//    //方法调用

//    NSInvocation *invocation=[NSInvocation invocationWithMethodSignature:methSignt];

//    [invocation setTarget:self];

//    [invocation setSelector:@selector(print:obj2:)];

//    

//    //设置参数

//    NSString *str=@"abc";

//    NSNumber *num=@122;

//    [invocation setArgument:&str atIndex:2];

//    [invocation setArgument:&num atIndex:3];

//    //调用方法

//    [invocation invoke];

//    NSInvocationOperation *invocationOper=[[NSInvocationOperation alloc]initWithInvocation:invocation];

//    [invocationOper start];

    

    

//    NSBlockOperation *blockOper=[NSBlockOperation blockOperationWithBlock:^{

//        NSLog(@"----%@",[NSThread isMainThread]?@"IS":@"NO");

//    }];

//    

//    [blockOper addExecutionBlock:^{

//        NSLog(@"++==%@",[NSThread isMainThread]?@"IS":@"NO");

//    }];

//    

//    [blockOper start];

    

    

    NSInvocationOperation *op1=[[NSInvocationOperation alloc]initWithTarget:self selector:@selector(print:) object:@1];

    NSInvocationOperation *op2=[[NSInvocationOperation alloc]initWithTarget:self selector:@selector(print:) object:@2];

    NSInvocationOperation *op3=[[NSInvocationOperation alloc]initWithTarget:self selector:@selector(print:) object:@3];

    NSInvocationOperation *op4=[[NSInvocationOperation alloc]initWithTarget:self selector:@selector(print:) object:@4];

    //执行操作，并发执行

//    NSOperationQueue *queue=[[NSOperationQueue alloc]init];

    //主队列可以保证都是在主线程

    NSOperationQueue *queue=[NSOperationQueue mainQueue];

    [queue addOperation:op1];

    [queue addOperation:op2];

    [queue addOperation:op4];

    [queue addOperation:op3];



    [queue addOperationWithBlock:^{

        NSLog(@"%@",[NSThread isMainThread]?@"IS":@"NO");

    }];

    

}



- (void)print:(id)obj

{

    NSLog(@"%@  %@",obj,[NSThread isMainThread]?@"IS":@"No");

}



- (void)print:(id)object obj2:(id)object2

{

    NSLog(@"%@, %@,%@: %@", self,NSStringFromSelector(_cmd), object, object2);

    NSLog(@"%@", [NSThread isMainThread]?@"Main":@"Not");

}





- (void)didReceiveMemoryWarning {

    [super didReceiveMemoryWarning];

    // Dispose of any resources that can be recreated.

}



@end