/
OperationViewController.m
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/
OperationViewController.m
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//
// OperationViewController.m
// NetworkDemo
//
// Created by Vincent on 01/01/13.
// Copyright (c) 2013 __MyCompanyName__. All rights reserved.
//
#import "OperationViewController.h"
#import "ImageOperation.h"
@interface OperationViewController ()
@property (nonatomic) NSOperationQueue *queue;
@end
@implementation OperationViewController
@synthesize profiles;
- (id)initWithCoder:(NSCoder *)aDecoder
{
self = [super initWithCoder:aDecoder];
if (self) {
self.queue =[[NSOperationQueue alloc]init ];
[self.queue setMaxConcurrentOperationCount:3];
self.profiles = @[
@{@"name":@"Apple Store",@"URL":@"https://graph.facebook.com/AppStore/picture?type=large"},
@{@"name":@"gaga",@"URL":@"https://graph.facebook.com/ladygaga/picture?type=large"},
@{@"name":@"CSIMiami",@"URL":@"https://graph.facebook.com/CSIMiami/picture?type=large"},
@{@"name":@"YahooTWNews",@"URL":@"https://graph.facebook.com/YahooTWNews/picture?type=large"},
@{@"name":@"kanpai.fans",@"URL":@"https://graph.facebook.com/kanpai.fans/picture?type=large"},
@{@"name":@"Apple Store",@"URL":@"https://graph.facebook.com/AppStore/picture?type=large"},
@{@"name":@"gaga",@"URL":@"https://graph.facebook.com/ladygaga/picture?type=large"},
@{@"name":@"CSIMiami",@"URL":@"https://graph.facebook.com/CSIMiami/picture?type=large"},
@{@"name":@"YahooTWNews",@"URL":@"https://graph.facebook.com/YahooTWNews/picture?type=large"},
@{@"name":@"kanpai.fans",@"URL":@"https://graph.facebook.com/kanpai.fans/picture?type=large"},
@{@"name":@"kanpai.fans",@"URL":@"https://graph.facebook.com/kanpai.fans/picture?type=large"},
@{@"name":@"Apple Store",@"URL":@"https://graph.facebook.com/AppStore/picture?type=large"},
@{@"name":@"gaga",@"URL":@"https://graph.facebook.com/ladygaga/picture?type=large"},
@{@"name":@"CSIMiami",@"URL":@"https://graph.facebook.com/CSIMiami/picture?type=large"},
@{@"name":@"YahooTWNews",@"URL":@"https://graph.facebook.com/YahooTWNews/picture?type=large"},
@{@"name":@"kanpai.fans",@"URL":@"https://graph.facebook.com/kanpai.fans/picture?type=large"},
@{@"name":@"Apple Store",@"URL":@"https://graph.facebook.com/AppStore/picture?type=large"},
@{@"name":@"gaga",@"URL":@"https://graph.facebook.com/ladygaga/picture?type=large"},
@{@"name":@"CSIMiami",@"URL":@"https://graph.facebook.com/CSIMiami/picture?type=large"},
@{@"name":@"YahooTWNews",@"URL":@"https://graph.facebook.com/YahooTWNews/picture?type=large"},
@{@"name":@"kanpai.fans",@"URL":@"https://graph.facebook.com/kanpai.fans/picture?type=large"},
@{@"name":@"Apple Store",@"URL":@"https://graph.facebook.com/AppStore/picture?type=large"},
@{@"name":@"gaga",@"URL":@"https://graph.facebook.com/ladygaga/picture?type=large"},
@{@"name":@"CSIMiami",@"URL":@"https://graph.facebook.com/CSIMiami/picture?type=large"},
@{@"name":@"YahooTWNews",@"URL":@"https://graph.facebook.com/YahooTWNews/picture?type=large"},
@{@"name":@"kanpai.fans",@"URL":@"https://graph.facebook.com/kanpai.fans/picture?type=large"},
@{@"name":@"kanpai.fans",@"URL":@"https://graph.facebook.com/kanpai.fans/picture?type=large"},
@{@"name":@"Apple Store",@"URL":@"https://graph.facebook.com/AppStore/picture?type=large"},
@{@"name":@"gaga",@"URL":@"https://graph.facebook.com/ladygaga/picture?type=large"},
@{@"name":@"CSIMiami",@"URL":@"https://graph.facebook.com/CSIMiami/picture?type=large"},
@{@"name":@"YahooTWNews",@"URL":@"https://graph.facebook.com/YahooTWNews/picture?type=large"},
@{@"name":@"kanpai.fans",@"URL":@"https://graph.facebook.com/kanpai.fans/picture?type=large"},
@{@"name":@"Apple Store",@"URL":@"https://graph.facebook.com/AppStore/picture?type=large"},
@{@"name":@"gaga",@"URL":@"https://graph.facebook.com/ladygaga/picture?type=large"},
@{@"name":@"CSIMiami",@"URL":@"https://graph.facebook.com/CSIMiami/picture?type=large"},
@{@"name":@"YahooTWNews",@"URL":@"https://graph.facebook.com/YahooTWNews/picture?type=large"},
@{@"name":@"kanpai.fans",@"URL":@"https://graph.facebook.com/kanpai.fans/picture?type=large"},
@{@"name":@"Apple Store",@"URL":@"https://graph.facebook.com/AppStore/picture?type=large"},
@{@"name":@"gaga",@"URL":@"https://graph.facebook.com/ladygaga/picture?type=large"},
@{@"name":@"CSIMiami",@"URL":@"https://graph.facebook.com/CSIMiami/picture?type=large"},
@{@"name":@"YahooTWNews",@"URL":@"https://graph.facebook.com/YahooTWNews/picture?type=large"},
@{@"name":@"kanpai.fans",@"URL":@"https://graph.facebook.com/kanpai.fans/picture?type=large"},
@{@"name":@"kanpai.fans",@"URL":@"https://graph.facebook.com/kanpai.fans/picture?type=large"},
@{@"name":@"Apple Store",@"URL":@"https://graph.facebook.com/AppStore/picture?type=large"},
@{@"name":@"gaga",@"URL":@"https://graph.facebook.com/ladygaga/picture?type=large"},
@{@"name":@"CSIMiami",@"URL":@"https://graph.facebook.com/CSIMiami/picture?type=large"},
@{@"name":@"YahooTWNews",@"URL":@"https://graph.facebook.com/YahooTWNews/picture?type=large"},
@{@"name":@"kanpai.fans",@"URL":@"https://graph.facebook.com/kanpai.fans/picture?type=large"},
@{@"name":@"Apple Store",@"URL":@"https://graph.facebook.com/AppStore/picture?type=large"},
@{@"name":@"gaga",@"URL":@"https://graph.facebook.com/ladygaga/picture?type=large"},
@{@"name":@"CSIMiami",@"URL":@"https://graph.facebook.com/CSIMiami/picture?type=large"},
@{@"name":@"YahooTWNews",@"URL":@"https://graph.facebook.com/YahooTWNews/picture?type=large"},
@{@"name":@"kanpai.fans",@"URL":@"https://graph.facebook.com/kanpai.fans/picture?type=large"},
@{@"name":@"Apple Store",@"URL":@"https://graph.facebook.com/AppStore/picture?type=large"},
@{@"name":@"gaga",@"URL":@"https://graph.facebook.com/ladygaga/picture?type=large"},
@{@"name":@"CSIMiami",@"URL":@"https://graph.facebook.com/CSIMiami/picture?type=large"},
@{@"name":@"YahooTWNews",@"URL":@"https://graph.facebook.com/YahooTWNews/picture?type=large"},
@{@"name":@"kanpai.fans",@"URL":@"https://graph.facebook.com/kanpai.fans/picture?type=large"},
@{@"name":@"kanpai.fans",@"URL":@"https://graph.facebook.com/kanpai.fans/picture?type=large"},
@{@"name":@"Apple Store",@"URL":@"https://graph.facebook.com/AppStore/picture?type=large"},
@{@"name":@"gaga",@"URL":@"https://graph.facebook.com/ladygaga/picture?type=large"},
@{@"name":@"CSIMiami",@"URL":@"https://graph.facebook.com/CSIMiami/picture?type=large"},
@{@"name":@"YahooTWNews",@"URL":@"https://graph.facebook.com/YahooTWNews/picture?type=large"},
@{@"name":@"kanpai.fans",@"URL":@"https://graph.facebook.com/kanpai.fans/picture?type=large"},
];
self.title = @"operation";
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"Reload" style:UIBarButtonItemStylePlain target:self action:@selector(reload:)];
// Do any additional setup after loading the view from its nib.
}
- (void)reload:(id)sender {
[self.tableView reloadData];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
#pragma mark UITableViewDataSource
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return self.profiles.count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
NSString static *identifier = @"identifier";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:identifier];
if ( !cell ){
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:identifier];
cell.imageView.contentMode = UIViewContentModeScaleAspectFit;
}
//清掉image防止requse時，用到上次的圖片
cell.imageView.image=nil;
NSDictionary *profile = [self.profiles objectAtIndex:indexPath.row];
cell.textLabel.text = [profile objectForKey:@"name"];
NSURL *imageUrl = [NSURL URLWithString:[profile objectForKey:@"URL"]];
ImageOperation *operation = [[ImageOperation alloc]init];
operation.imageURL =imageUrl;
operation.tbaleView = tableView;
operation.indexPath = indexPath;
[self.queue addOperation:operation];
/*
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
NSData *data = [NSData dataWithContentsOfURL:imageUrl];
dispatch_async(dispatch_get_main_queue(), ^{
//利用之前的外置，札巡看看該位置是否在畫面上，如果不在畫面上
//回傳的cell會空直
UITableViewCell *cell1=[tableView cellForRowAtIndexPath:indexPath];
if (cell1) {
cell1.imageView.image = [UIImage imageWithData:data];
[cell1 setNeedsLayout];//重新排版
}
} );
});
*/
return cell;
}
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {
return 55;
}
- (void)tableView:(UITableView *)tableView didEndDisplayingCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath {
NSArray *opreations = self.queue.operations;
for (NSOperation *operation in opreations) {
ImageOperation *imageOperation = (ImageOperation*)operation;
if ([indexPath compare:imageOperation.indexPath] == NSOrderedSame ) {
[imageOperation cancel];
}
}
}
@end