RayProject/08 MultiThread/MultiThread_NSOperation/MultiThread/KCMainViewController.m at master · Ray0218/RayProject · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
//
//  NSOperation实现多线程
//  MultiThread
//
//  Created by Kenshin Cui on 14-3-22.
//  Copyright (c) 2014年 Kenshin Cui. All rights reserved.
//

#import "KCMainViewController.h"
#import "KCImageData.h"
#define ROW_COUNT 5
#define COLUMN_COUNT 3
#define ROW_HEIGHT 100
#define ROW_WIDTH ROW_HEIGHT
#define CELL_SPACING 10

@interface KCMainViewController (){
    NSMutableArray *_imageViews;
    NSMutableArray *_imageNames;
}

@end

@implementation KCMainViewController

- (void)viewDidLoad {
    [super viewDidLoad];

    [self layoutUI];
}

#pragma mark 界面布局
-(void)layoutUI{
    //创建多个图片空间用于显示图片
    _imageViews=[NSMutableArray array];
    for (int r=0; r<ROW_COUNT; r++) {
        for (int c=0; c<COLUMN_COUNT; c++) {
            UIImageView *imageView=[[UIImageView alloc]initWithFrame:CGRectMake(c*ROW_WIDTH+(c*CELL_SPACING), r*ROW_HEIGHT+(r*CELL_SPACING                           ), ROW_WIDTH, ROW_HEIGHT)];
            imageView.contentMode=UIViewContentModeScaleAspectFit;
//            imageView.backgroundColor=[UIColor redColor];
            [self.view addSubview:imageView];
            [_imageViews addObject:imageView];

        }
    }

    UIButton *button=[UIButton buttonWithType:UIButtonTypeRoundedRect];
    button.frame=CGRectMake(50, 500, 220, 25);
    [button setTitle:@"加载图片" forState:UIControlStateNormal];
    //添加方法
    [button addTarget:self action:@selector(loadImageWithMultiThread) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:button];

    //创建图片链接
    _imageNames=[NSMutableArray array];
    [_imageNames addObject:@"http://d.pcs.baidu.com/thumbnail/e2eb61a8c8a36abcf4ee6ea343a97811?fid=2637405421-250528-427976146823627&time=1411023600&sign=FDTAER-DCb740ccc5511e5e8fedcff06b081203-4rsm4fkKSIZ03MDf09QlBxfdB5o%3D&rt=sh&expires=2h&r=926397348&sharesign=unknown&size=c850_u580&quality=100"];
    [_imageNames addObject:@"http://d.pcs.baidu.com/thumbnail/de7e3817061146590684acc35981ed99?fid=2637405421-250528-457200000198194&time=1411023600&sign=FDTAER-DCb740ccc5511e5e8fedcff06b081203-S3hvNK3flVKpRH356C4JaOHQ%2ByY%3D&rt=sh&expires=2h&r=371152628&sharesign=unknown&size=c850_u580&quality=100"];
    [_imageNames addObject:@"http://d.pcs.baidu.com/thumbnail/cd435950f7f2ca3c99e842557d423004?fid=2637405421-250528-499114072296878&time=1411023600&sign=FDTAER-DCb740ccc5511e5e8fedcff06b081203-2%2F3DrEr%2Fw0n1XWgd1SVa15vfq7Y%3D&rt=sh&expires=2h&r=985890307&sharesign=unknown&size=c850_u580&quality=100"];
    [_imageNames addObject:@"http://d.pcs.baidu.com/thumbnail/98c6f715496492d7482cecee2093bebf?fid=2637405421-250528-744557588153728&time=1411023600&sign=FDTAER-DCb740ccc5511e5e8fedcff06b081203-ed3qPerMdGTtMvmxb%2Festf0Ib44%3D&rt=sh&expires=2h&r=911553653&sharesign=unknown&size=c850_u580&quality=100"];

    [_imageNames addObject:@"http://d.pcs.baidu.com/thumbnail/fe744451b0d07a21671b488744acffea?fid=2637405421-250528-1041183547028500&time=1411023600&sign=FDTAER-DCb740ccc5511e5e8fedcff06b081203-5Ie%2FkpAMrzF0Vet2kS9KhkICXcI%3D&rt=sh&expires=2h&r=296057714&sharesign=unknown&size=c850_u580&quality=100"];
    [_imageNames addObject:@"http://d.pcs.baidu.com/thumbnail/178167b69632108de56f0486041a938a?fid=2637405421-250528-792617735312884&time=1411023600&sign=FDTAER-DCb740ccc5511e5e8fedcff06b081203-eTZxP%2BKcR3wmS36HOWGnAr1681s%3D&rt=sh&expires=2h&r=661097853&sharesign=unknown&size=c850_u580&quality=100"];
    [_imageNames addObject:@"http://d.pcs.baidu.com/thumbnail/915fac2807aefe74fe3b4003b0d499cd?fid=2637405421-250528-1125022926582204&time=1411023600&sign=FDTAER-DCb740ccc5511e5e8fedcff06b081203-sHZUoqtIF%2BhlGeN0FwUBWJeBBas%3D&rt=sh&expires=2h&r=552734380&sharesign=unknown&size=c850_u580&quality=100"];
    [_imageNames addObject:@"http://d.pcs.baidu.com/thumbnail/28816ef2149269e6bab314458e187112?fid=2637405421-250528-358909248400619&time=1411023600&sign=FDTAER-DCb740ccc5511e5e8fedcff06b081203-9nkVP6ZLJvtmfQa9GDCaDTL9kjY%3D&rt=sh&expires=2h&r=452851199&sharesign=unknown&size=c850_u580&quality=100"];
    [_imageNames addObject:@"http://d.pcs.baidu.com/thumbnail/445b8f6f0b387f6f744f33ad5b531b17?fid=2637405421-250528-849921016634467&time=1411023600&sign=FDTAER-DCb740ccc5511e5e8fedcff06b081203-6PfyIqn8WwaaPwSi6IMz6%2F39M4g%3D&rt=sh&expires=2h&r=857801273&sharesign=unknown&size=c850_u580&quality=100"];
    [_imageNames addObject:@"http://d.pcs.baidu.com/thumbnail/d4657836506fcbffdfcc3a05bf0ec861?fid=2637405421-250528-1070193473554196&time=1411023600&sign=FDTAER-DCb740ccc5511e5e8fedcff06b081203-yzFMKAxPdY8OpoykVDau9EMR9hM%3D&rt=sh&expires=2h&r=573796882&sharesign=unknown&size=c850_u580&quality=100"];
    [_imageNames addObject:@"http://d.pcs.baidu.com/thumbnail/98bc0733c5836576e0538109d7b609f9?fid=2637405421-250528-527727066451971&time=1411023600&sign=FDTAER-DCb740ccc5511e5e8fedcff06b081203-K2BFaXsdmwCQhc5gq1Biwp%2BTAoM%3D&rt=sh&expires=2h&r=257829657&sharesign=unknown&size=c850_u580&quality=100"];
    [_imageNames addObject:@"http://d.pcs.baidu.com/thumbnail/d64301d47ce222ed2d16bd4e3cefe463?fid=2637405421-250528-729533307672651&time=1411023600&sign=FDTAER-DCb740ccc5511e5e8fedcff06b081203-0VtOWae8%2FOQXzGfPtZHwI5F%2FZGc%3D&rt=sh&expires=2h&r=805424361&sharesign=unknown&size=c850_u580&quality=100"];
    [_imageNames addObject:@"http://d.pcs.baidu.com/thumbnail/6427b55749c5a0d8211fc7f39161f7d5?fid=2637405421-250528-713254084806501&time=1411023600&sign=FDTAER-DCb740ccc5511e5e8fedcff06b081203-Sdsq2pgWnuwXjw%2FpcCGhBJ%2F4mso%3D&rt=sh&expires=2h&r=120178831&sharesign=unknown&size=c850_u580&quality=100"];
    [_imageNames addObject:@"http://d.pcs.baidu.com/thumbnail/a3f163aa69cca84e28d31bba867c7aed?fid=2637405421-250528-312934263180853&time=1411023600&sign=FDTAER-DCb740ccc5511e5e8fedcff06b081203-tdHYL4WD1X1Si5ny0q59ue5OsEo%3D&rt=sh&expires=2h&r=452370773&sharesign=unknown&size=c850_u580&quality=100"];
    [_imageNames addObject:@"http://d.pcs.baidu.com/thumbnail/b996e8b77a63b08f7c5494e440cc04c3?fid=2637405421-250528-612197976068180&time=1411023600&sign=FDTAER-DCb740ccc5511e5e8fedcff06b081203-NgHV3uVfaMRrnyStazlT5Alvm3s%3D&rt=sh&expires=2h&r=428875771&sharesign=unknown&size=c850_u580&quality=100"];

}

#pragma mark 将图片显示到界面
-(void)updateImageWithData:(NSData *)data andIndex:(int )index{
    UIImage *image=[UIImage imageWithData:data];
    UIImageView *imageView= _imageViews[index];
    imageView.image=image;
}

#pragma mark 请求图片数据
-(NSData *)requestData:(int )index{
    //对于多线程操作建议把线程操作放到@autoreleasepool中
    @autoreleasepool {
        NSURL *url=[NSURL URLWithString:_imageNames[index]];
        NSData *data=[NSData dataWithContentsOfURL:url];

        return data;
    }
}

#pragma mark 加载图片
-(void)loadImage:(NSNumber *)index{
    int i=[index integerValue];

    //请求数据
    NSData *data= [self requestData:i];
//    NSLog(@"%@",[NSThread currentThread]);
    //更新UI界面,此处调用了主线程队列的方法（mainQueue是UI主线程）
    [[NSOperationQueue mainQueue] addOperationWithBlock:^{
        [self updateImageWithData:data andIndex:i];
    }];
}

#pragma mark 多线程下载图片
-(void)loadImageWithMultiThread{
    int count=ROW_COUNT*COLUMN_COUNT;
    //创建操作队列
    NSOperationQueue *operationQueue=[[NSOperationQueue alloc]init];
    operationQueue.maxConcurrentOperationCount=5;//设置最大并发线程数

    NSBlockOperation *lastBlockOperation=[NSBlockOperation blockOperationWithBlock:^{
        [self loadImage:[NSNumber numberWithInt:(count-1)]];
    }];
    //创建多个线程用于填充图片
    for (int i=0; i<count-1; ++i) {
        //方法1：创建操作块添加到队列
        //创建多线程操作
        NSBlockOperation *blockOperation=[NSBlockOperation blockOperationWithBlock:^{
            [self loadImage:[NSNumber numberWithInt:i]];
        }];
        //设置依赖操作为最后一张图片加载操作
        [blockOperation addDependency:lastBlockOperation];

        [operationQueue addOperation:blockOperation];

    }
    //将最后一个图片的加载操作加入线程队列
    [operationQueue addOperation:lastBlockOperation];
}

//#pragma mark 多线程下载图片
//-(void)loadImageWithMultiThread{
//    int count=ROW_COUNT*COLUMN_COUNT;
//    //创建操作队列
//    NSOperationQueue *operationQueue=[[NSOperationQueue alloc]init];
//    operationQueue.maxConcurrentOperationCount=5;//设置最大并发线程数
//    //创建多个线程用于填充图片
//    for (int i=0; i<count; ++i) {
//        //方法1：创建操作块添加到队列
////        //创建多线程操作
////        NSBlockOperation *blockOperation=[NSBlockOperation blockOperationWithBlock:^{
////            [self loadImage:[NSNumber numberWithInt:i]];
////        }];
////        //创建操作队列
////
////        [operationQueue addOperation:blockOperation];
//
//        //方法2：直接使用操队列添加操作
//        [operationQueue addOperationWithBlock:^{
//            [self loadImage:[NSNumber numberWithInt:i]];
//        }];
//
//    }
//}
@end