调用系统的相机上传照片

• -(void)tapGestureRecognizer:(UITapGestureRecognizer *)sender {
  
      UIActionSheet *action = [[UIActionSheet alloc] initWithTitle:@"选择照片" delegate: self cancelButtonTitle:@"取消" destructiveButtonTitle:@"相机" otherButtonTitles:@"本地相册", nil];
      [action showInView:self.view];
  }
  
  - (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex {
  
      if (buttonIndex == 2) {
          return;
      }
  
      //创建图片选择器
      UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];
      imagePicker.delegate = self;
      //设置图片选择属性
      imagePicker.allowsEditing = NO;
    
      if (buttonIndex == 0) {
         
          if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {
              //真机打开
              imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;
          }else {
          
              //模拟器打开
              NSLog(@"模拟器打开");
              return;
          }
          
      }else {
          //相册
          imagePicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
      }
      //进去选择器
      [self presentViewController:imagePicker animated:YES completion:nil];
      self.modalPresentationStyle = UIModalPresentationOverCurrentContext;
      
  }
  
  #pragma mark - UIImagePickerControllerDelegate
  - (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 *data;
          if (UIImagePNGRepresentation(image) == nil)
          {
              data = UIImageJPEGRepresentation(image, 1.0);
          }
          else
          {
              data = UIImagePNGRepresentation(image);
          }
          
          self.headImg.image = 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:data attributes:nil];
          
          //得到选择后沙盒中图片的完整路径
          self.filePath = [[NSString alloc]initWithFormat:@"%@%@",DocumentsPath,  @"/image.png"];
          
          //关闭相册界面
          [picker dismissViewControllerAnimated:YES completion:nil];
          
      
      //[self saveChangeData];
      }
      
  }
  //#pragma mark - delegate
  //- (void)saveChangeData {
  
      //NSData *imagData =UIImagePNGRepresentation(self.headImg.image);
      //NSString *imageStr = [[NSString alloc] initWithData:imagData encoding:NSUTF8StringEncoding];
      //NSLog(@"0------%@",imageStr);
      //[DataManager getInstance].user.head_image = imageStr;
  //}