//

// QueueViewController.m

// StudyiOS

//

// Created by on 11-10-16.

// Copyright (c) 2011年 ZhangYiCheng. All rights reserved.

//

#import "QueueViewController.h"

// Private stuff

@interface QueueViewController ()

- (void)imageFetchComplete:(ASIHTTPRequest *)request;

- (void)imageFetchFailed:(ASIHTTPRequest *)request;

@end

@implementation QueueViewController

@synthesize networkQueue;

@synthesize imageView1;

@synthesize imageView2;

@synthesize imageView3;

@synthesize progressIndicator;

@synthesize accurateProgress;

@synthesize imageProgressIndicator1;

@synthesize imageProgressIndicator2;

@synthesize imageProgressIndicator3;

@synthesize imageLabel1;

@synthesize imageLabel2;

@synthesize imageLabel3;

@synthesize failed;

- (void)didReceiveMemoryWarning

{

// Releases the view if it doesn't have a superview.

[super didReceiveMemoryWarning];

// Release any cached data, images, etc that aren't in use.

}

#pragma mark - View lifecycle

- (void)viewDidUnload

{

self.networkQueue = nil;

self.imageView1 = nil;

self.imageView2 = nil;

self.imageView3 = nil;

self.progressIndicator = nil;

self.accurateProgress = nil;

self.imageProgressIndicator1 = nil;

self.imageProgressIndicator2 = nil;

self.imageProgressIndicator3 = nil;

self.imageLabel1 = nil;

self.imageLabel2 = nil;

self.imageLabel3 = nil;

[super viewDidUnload];

}

- (void)dealloc

{

// 退出时清空队列

[networkQueue reset];

}

- (void)viewDidLoad

{

// 增加Code按钮，可跳转至教学页面

UIBarButtonItem *item = [[UIBarButtonItem alloc] initWithTitle:@"Code" style:UIBarButtonItemStyleBordered target:self action:@selector(code)];

//self.navigationItem.rightBarButtonItem = item;

self.tabBarController.navigationItem.rightBarButtonItem = item;

[super viewDidLoad];

}

- (IBAction)fetchThreeImages:(id)sender

{

// UI清空

[imageView1 setImage:nil];

[imageView2 setImage:nil];

[imageView3 setImage:nil];

self.progressIndicator.progress = 0.0;

self.imageProgressIndicator1.progress = 0.0;

self.imageProgressIndicator2.progress = 0.0;

self.imageProgressIndicator3.progress = 0.0;

// 初始化队列

if (!networkQueue) {

networkQueue = [[ASINetworkQueue alloc] init];

// 设置最大并发数 默认为-1 无限制

[networkQueue setMaxConcurrentOperationCount:10];

}

failed = NO;

// 重制队列

[networkQueue reset];

// 设置队列的进度条

[networkQueue setDownloadProgressDelegate:progressIndicator];

// 设置完成方法

[networkQueue setRequestDidFinishSelector:@selector(imageFetchComplete:)];

// 设置错误方法

[networkQueue setRequestDidFailSelector:@selector(imageFetchFailed:)];

// 显示精确进度

[networkQueue setShowAccurateProgress:YES];

[networkQueue setDelegate:self];

// 初始化请求

ASIHTTPRequest *request;

// 设置请求URL

request = [ASIHTTPRequest requestWithURL:[NSURL URLWithString:@"http://allseeing-i.com/ASIHTTPRequest/tests/images/small-image.jpg"]];

// 设置下载的目标路径

[request setDownloadDestinationPath:[[NSHomeDirectory() stringByAppendingPathComponent:@"Documents"] stringByAppendingPathComponent:@"1.png"]];

// 设置进度条

[request setDownloadProgressDelegate:imageProgressIndicator1];

// 自定义用户信息

[request setUserInfo:[NSDictionary dictionaryWithObject:@"request1" forKey:@"name"]];

// 将请求加入队列

[networkQueue addOperation:request];

// 同上

request = [[ASIHTTPRequest alloc] initWithURL:[NSURL URLWithString:@"http://allseeing-i.com/ASIHTTPRequest/tests/images/medium-image.jpg"]];

[request setDownloadDestinationPath:[[NSHomeDirectory() stringByAppendingPathComponent:@"Documents"] stringByAppendingPathComponent:@"2.png"]];

[request setDownloadProgressDelegate:imageProgressIndicator2];

[request setUserInfo:[NSDictionary dictionaryWithObject:@"request2" forKey:@"name"]];

[networkQueue addOperation:request];

// 同上

request = [[ASIHTTPRequest alloc] initWithURL:[NSURL URLWithString:@"http://allseeing-i.com/ASIHTTPRequest/tests/images/large-image.jpg"]];

[request setDownloadDestinationPath:[[NSHomeDirectory() stringByAppendingPathComponent:@"Documents"] stringByAppendingPathComponent:@"3.png"]];

[request setDownloadProgressDelegate:imageProgressIndicator3];

[request setUserInfo:[NSDictionary dictionaryWithObject:@"request3" forKey:@"name"]];

[networkQueue addOperation:request];

// 启动队列

[networkQueue go];

}

// 请求成功后更新UI

- (void)imageFetchComplete:(ASIHTTPRequest *)request

{

// 从下载路径里读取文件

UIImage *img = [UIImage imageWithContentsOfFile:[request downloadDestinationPath]];

NSString *name = [[request userInfo] valueForKey:@"name"];

if (img) {

if ([name isEqualToString:@"request1"]) {

[imageView1 setImage:img];

}else if([name isEqualToString:@"request2"]){

[imageView2 setImage:img];

}else if([name isEqualToString:@"request3"]){

[imageView3 setImage:img];

}

}

}

// 请求失败后调用

- (void)imageFetchFailed:(ASIHTTPRequest *)request

{

if (!failed) {

if ([[request error] domain] != NetworkRequestErrorDomain || [[request error] code] != ASIRequestCancelledErrorType) {

UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Download failed" message:@"Failed to download images" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];

[alertView show];

}

failed = YES;

}

}

// 跳转至教学页面

- (void)code

{

CodeViewController *controller = [[CodeViewController alloc] init];

NSString *name = [NSString stringWithUTF8String:object_getClassName(self)];

controller.className = name;

[self.navigationController pushViewController:controller animated:YES];

}

@end