iOS-上传相册图片

注：用的AFNetworking版本低于3.0

1、遵守协议UIImagePickerControllerDelegate,UINavigationControllerDelegate
2、首先创建按钮，添加点击事件

//点击事件
- (void)onTapSecondCell
{
    UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"提示" message:nil preferredStyle:UIAlertControllerStyleActionSheet];
    __weak typeof(self) weakSelf = self;
    UIAlertAction *action1 = [UIAlertAction actionWithTitle:@"打开相机" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
        [weakSelf takePhoto];
    }];
    UIAlertAction *action2 = [UIAlertAction actionWithTitle:@"打开相册" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
        [weakSelf localPhoto];
    }];
    UIAlertAction *action3 = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
        [alert dismissViewControllerAnimated:YES completion:^{
            NSLog(@"取消准备照片");
        }];
    }];
    [alert addAction:action1];
    [alert addAction:action2];
    [alert addAction:action3];
    [self presentViewController:alert animated:YES completion:nil];
}
//打开相机
- (void)takePhoto
{
    UIImagePickerControllerSourceType sourceType = UIImagePickerControllerSourceTypeCamera;
    if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera])//相机
    {
        UIImagePickerController *picker = [[UIImagePickerController alloc] init];
        picker.delegate = self;
        picker.allowsEditing = YES;
        picker.sourceType = sourceType;
        
        [self presentViewController:picker animated:YES completion:^{
            NSLog(@"调取相机成功");
        }];
    }
    else{
        NSLog(@"模拟器情况下无法打开");
    }
}
//打开相册
- (void)localPhoto
{
    UIImagePickerControllerSourceType sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
    if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary])//相册
    {
        UIImagePickerController *picker = [[UIImagePickerController alloc] init];
        picker.delegate = self;
        picker.allowsEditing = YES;
        picker.sourceType = sourceType;
        [self presentViewController:picker animated:YES completion:^{
            NSLog(@"调取相册成功");
        }];
    }
    else{
        NSLog(@"相册打不开应该是出问题了");
    }
}

实现协议方法

//当选择一张图片后进入到这个协议方法里
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info
{
    NSString *type = [info objectForKey:UIImagePickerControllerMediaType];
    //当选择的类型是图片
    if ([type isEqualToString:@"public.image"])
    {
        //先把图片转成NSData
        UIImage* image = [info objectForKey:@"UIImagePickerControllerOriginalImage"];
     
        NSData *data1;
        if (UIImagePNGRepresentation(image) == nil)
        {
            data1 = UIImageJPEGRepresentation(image, 1);
        }
        else
        {
            data1 = UIImagePNGRepresentation(image);
        }
        //图片保存的路径
        //这里将图片放在沙盒的documents文件夹中
        NSString * DocumentsPath = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents"];
        //文件管理器
        NSFileManager *fileManager = [NSFileManager defaultManager];
        //把刚刚图片转换的data对象拷贝至沙盒中 并保存为image.png
        [fileManager createDirectoryAtPath:DocumentsPath withIntermediateDirectories:YES attributes:nil error:nil];
        [fileManager createFileAtPath:[DocumentsPath stringByAppendingString:@"/image.png"] contents:data1 attributes:nil];
        //得到选择后沙盒中图片的完整路径
        NSString *filePath = [[NSString alloc]initWithFormat:@"%@%@",DocumentsPath,  @"/image.png"];
        long long abc = [self fileSizeAtPath:filePath];
        if (abc < 1024000) {
            _headerImage = image;
        }
        else {
            //如果图片尺寸过大则压缩
            UIImage *small = [Help imageWithImageSimple:image scaledToSize:CGSizeMake(image.size.width/4, image.size.height/4)];
            NSData *data;
            if (UIImagePNGRepresentation(small) == nil)
            {
                data = UIImageJPEGRepresentation(small, 0.25);
            }
            else
            {
                data = UIImagePNGRepresentation(small);
            }     
            [fileManager createFileAtPath:[DocumentsPath stringByAppendingString:@"/image.png"] contents:data attributes:nil];
            _headerImage = small;
        }
        //关闭相册界面
        [picker dismissViewControllerAnimated:YES completion:^{
            NSLog(@"关闭相册界面");
        }];
        [self.tableView reloadData];
    }
}
//判断文件的大小
- (long long) fileSizeAtPath:(NSString*) filePath{
    NSFileManager* manager = [NSFileManager defaultManager];
    if ([manager fileExistsAtPath:filePath]){
        return [[manager attributesOfItemAtPath:filePath error:nil] fileSize];
    }
    return 0;
}
- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker
{
    [picker dismissViewControllerAnimated:YES completion:^{
        NSLog(@"您取消了选择图片222");
    }];
}

选中图片上传

- (void)postData
{
    AFHTTPRequestOperationManager *manage = [AFHTTPRequestOperationManager manager];
    manage.responseSerializer = [AFHTTPResponseSerializer serializer];
    __weak typeof(self) weakSelf = self;
    [MBProgressHUD showHUDAddedTo:self.tableView animated:YES];
    [manage POST:Health_GetReportPic parameters:nil constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
        //上传图片
        NSData *data = UIImageJPEGRepresentation(_headerImage, 1.0);
        [formData appendPartWithFileData:data name:@"report_pic_path" fileName:@"image.png" mimeType:@"png"];
//name-->对应数据库存储的字段  
    } success:^(AFHTTPRequestOperation *operation, id responseObject) {
        NSDictionary *dict = [NSJSONSerialization JSONObjectWithData:responseObject options:NSJSONReadingAllowFragments error:nil];
        if ([dict[@"message"] isEqualToString:@"数据插入成功"]) 
        {
            [MBProgressHUD hideHUDForView:self.tableView animated:YES];
            [weakSelf addAlertControllerWithMessage:@"上传成功"];
            //沙盒中图片的完整路径
            NSString *string1 = [NSHomeDirectory() stringByAppendingString:@"/Documents/image.jpg"];
            NSFileManager *fileManage = [NSFileManager defaultManager];
            [fileManage removeItemAtPath:string1 error:nil];
        }
    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        NSLog(@"%@",error.localizedDescription);
        [MBProgressHUD hideHUDForView:self.tableView animated:YES];
        [weakSelf addAlertControllerWithMessage:@"上传失败"];
    }];
}