选择本地图片上传到服务器进行头像设置以及文件下载

需要实现的协议

@interface RegistController ()<UIImagePickerControllerDelegate, UINavigationControllerDelegate>

 1 - (void)postHeadImage{
 2     //打开 图片的用户交互
 3     self.headimageView.userInteractionEnabled = YES;
 4     
 5     //创建一个点击手势
 6     UITapGestureRecognizer * tapGR = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(tap_View:)];
 7     [self.headimageView addGestureRecognizer:tapGR];
 8 }
 9 //点击手势的事件
10 - (void)tap_View:(UITapGestureRecognizer *)tapGR{
11     //点击图片后, 调用相册, 选取图中的图片,
12     //[说明]照片的获取有两种方式, 1) 调用摄像头,模拟器不能使用摄像头,需要真机  2)第二种方式是调用相册获取图片
13     //先判断摄像头是否可用,
14 //    if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {
15 //        //摄像头可用
16 //        [self loadImageWithType:UIImagePickerControllerSourceTypeCamera];
17 //    }else{
18 //        //摄像头不可用
19 //        
20 //    }
21     
22     
23     //调用相册
24     [self loadImageWithType:UIImagePickerControllerSourceTypePhotoLibrary];
25 
26 }
27 
28 //调用摄像头或相册,调用此函数
29 - (void)loadImageWithType:(UIImagePickerControllerSourceType)imageType{
30     /**数据来源枚举
31      
32      UIImagePickerControllerSourceTypePhotoLibrary,      相册
33      UIImagePickerControllerSourceTypeCamera,            照相机
34      UIImagePickerControllerSourceTypeSavedPhotosAlbum   调用已经保存的文件(如: 图片, 视频均可)
35      
36      */
37 
38     //1. 创建图片容器
39     UIImagePickerController * picker = [[UIImagePickerController alloc]init];
40     //2. 设置操作类型
41     picker.sourceType = imageType;
42     //3. 给图片容器签订协议<UIImagePickerControllerDelegate,UINavigationControllerDelegate>
43     picker.delegate = self;
44     
45     //4. 显示图片容器的视图
46     [self presentViewController:picker animated:NO completion:nil];
47 }
48 
49 //协议回调函数, 此函数在相册中或摄像头中选择一张照片时, 被回调
50 /**
51  *  @param picker 当前的图片容器
52  *  @param info   选取的图片信息
53  */
54 - (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info{
55     //从参数中获取选取的图片
56     UIImage * image = info[UIImagePickerControllerOriginalImage];
57     //把图片显示到页面控件中
58     self.headimageView.image = image;
59     
60     //上传图片到服务器
61     //1. 图片转换成NSData
62     NSData * data = UIImagePNGRepresentation(image);
63     //2. post方式上传data
64     AFHTTPRequestOperationManager * manager = [AFHTTPRequestOperationManager manager];
65     manager.responseSerializer = [AFHTTPResponseSerializer serializer];
66     
67     //上传文本数据
68 //    [manager POST:@"http://10.0.8.8/sns/my/upload_headimage.php" parameters:nil success:^(AFHTTPRequestOperation *operation, id responseObject) {
69 //        //网络请求成功回调块
70 //        
71 //    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
72 //        //网络请求失败回调块
73 //        
74 //    }];
75     
76     [manager POST:@"XXXXXXXX"  parameters:nil constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
77         //指定上传图片(NSData) 上传文本之外的数据
78         //参数1: 要上传得附件
79         //参数2: 上传文件的名称, 与后台key值一致
80         //参数3: 所上传的附件的名字(应该保证上传的文件名不重复: 策略: 年月日时分秒毫秒3到5位随机数)
81         //参数4: 上传附件的扩展名
82         [formData appendPartWithFileData:data name:@"headimage" fileName:@"1.png" mimeType:@"image/png"];
83         
84     } success:^(AFHTTPRequestOperation *operation, id responseObject) {
85         //网络请求成功回调块
86         
87         NSLog(@"%@", [NSJSONSerialization JSONObjectWithData:responseObject options:NSJSONReadingMutableContainers error:nil][@"message"]);
88         
89     } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
90         //网络请求失败回调块
91         NSLog(@"%@", error);
92     }];
93     
94     [picker dismissViewControllerAnimated:YES completion:nil];
95 }

下载文件

 1 - (IBAction)btn_Download:(id)sender {
 2     // 完成图片的下载功能
 3     //1. 创建下载管理类对象, 初始化配置文件
 4     AFURLSessionManager * manager = [[AFURLSessionManager alloc]initWithSessionConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration]];
 5     
 6     //2. 确定下载地址
 7     NSString * path = @"http://c.hiphotos.baidu.com/baike/c0%3Dbaike92%2C5%2C5%2C92%2C30/sign=38c40c12718da9775a228e79d138937c/96dda144ad345982c0e32ab30ef431adcbef84a2.jpg";
 8     //3. 提交请求时, 应该擦除掉地址中的非法字符, 使用utf-8 编码格式
 9     //NSString * urlString = [path stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
10     //4. 设置请求对象
11     NSURL * url = [NSURL URLWithString:path];
12     NSURLRequest * request = [NSURLRequest requestWithURL:url];
13     
14     //5. 发送请求进行下载
15     NSURLSessionDownloadTask * task = [manager downloadTaskWithRequest:request progress:nil destination:^NSURL * _Nonnull(NSURL * _Nonnull targetPath, NSURLResponse * _Nonnull response) {
16         //告知下载后文件的存在路径
17         //NSHomeDirectory()  沙盒路径, 手机运行程序, 或程序读取的空间
18         NSString * filePath = [NSHomeDirectory() stringByAppendingString:@"/Documents/123.png"];
19         NSLog(@"%@", filePath);
20         return [NSURL fileURLWithPath:filePath];
21         
22     } completionHandler:^(NSURLResponse * _Nonnull response, NSURL * _Nonnull filePath, NSError * _Nonnull error) {
23         //判断下载是否出错
24         if (error) {
25             NSLog(@"%@", error);
26         }else{
27             NSLog(@"下载成功,  下载路径:%@", filePath);
28         }
29         
30     }];
31     
32     //6. 启动下载
33     [task resume];
34     
35 }