iphone NSOperation多线程使用
首先创建一个线程类，RequestOperation，它继承NSOperation，而后我们在控制器类当中，创建一个NSOperationQueue对象，将该线成加入到序列中。它就会自动的从NSOperationQueue当中取到我们加入的线程，而后运行线成的start方法。
#import <Foundation/Foundation.h>
@interface RequestOperation : NSOperation{
NSURLRequest *_request;
NSMutableData *_data;
NSString *message;
}
@property(nonatomic,retain)NSString *message;
-(id)initWithRequest:(NSURLRequest*)request;
@end
//
// RequestOperation.m
// NSOperation
//
// Created by wangqiulei on 8/23/10.
// Copyright 2010 __MyCompanyName__. All rights reserved.
//
#import "RequestOperation.h"
@implementation RequestOperation
@synthesize message;
-(id)initWithRequest:(NSURLRequest *)request{
if (self=[self init]) {
_request=[request retain];
_data=[[NSMutableData data]retain];
}
return self;
}
-(void)dealloc{
[_request release];
[_data release];
[super dealloc];
}
//如果返回为YES表示asychronously方式处理
-(BOOL)isConcurrent{
return YES;
}
//开始处理
-(void)start{
if (![self isCancelled]) {
NSLog(@"%@",self.message);
NSLog(@"-------------%d",[self retainCount]);
[NSURLConnection connectionWithRequest:_request delegate:self];
}
}
//取得数据
-(void) connection:(NSURLConnection *)connection didReceiveData:(NSData *)data{
//添加数据
[_data appendData:data];
NSLog(@"%@",_data);
}
//http请求结束
-(void)connectionDidFinishLoading:(NSURLConnection *)connection{
}
@end
#import "RootViewController.h"
@implementation RootViewController
#pragma mark -
#pragma mark View lifecycle
/*
- (void)viewDidLoad {
[super viewDidLoad];
// Uncomment the following line to display an Edit button in the navigation bar for this view controller.
// self.navigationItem.rightBarButtonItem = self.editButtonItem;
}
*/
/*
- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];
}
*/
/*
- (void)viewDidAppear:(BOOL)animated {
[super viewDidAppear:animated];
}
*/
/*
- (void)viewWillDisappear:(BOOL)animated {
[super viewWillDisappear:animated];
}
*/
/*
- (void)viewDidDisappear:(BOOL)animated {
[super viewDidDisappear:animated];
}
*/
/*
// Override to allow orientations other than the default portrait orientation.
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
// Return YES for supported orientations.
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
*/
-(void)buttonClicked:(id)sender{
_queue=[[NSOperationQueue alloc] init];
//第一个请求
NSURLRequest *request=[NSURLRequest requestWithURL:[NSURL URLWithString:@"http:www.google.com"]];
RequestOperation *operation=[[RequestOperation alloc] initWithRequest:request];
[_queue addOperation:operation];
[operation release];
//第二个请求
//NSURLRequest *request2=[NSURLRequest requestWithURL:[NSURL URLWithString:@"http:www.baidu.com"]];
//RequestOperation *operation1=[[RequestOperation alloc]initWithRequest:request2];
//operation1.message=@"operation1---";
//[_queue addOperation:operation1];
}
