ios客户端学习-上传头像

1.首先添加代理，因为使用到了imagePicker
UINavigationControllerDelegate
UIImagePickerControllerDelegate

2.给头像的imageview添加手势，从底部弹出actionSheet来选择拍照或者相册选择
// 选择头像
-(void)selectImg{
//底部弹出来个actionSheet来选择拍照或者相册选择
UIAlertController *userIconActionSheet = [UIAlertController alertControllerWithTitle:@“请选择上传类型” message:nil preferredStyle:UIAlertControllerStyleActionSheet];
//相册选择
UIAlertAction *albumAction = [UIAlertAction actionWithTitle:@“手机相册选择” style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
//这里加一个判断，是否是来自图片库
if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary]){
UIImagePickerController * imagePicker = [[UIImagePickerController alloc]init];
imagePicker.delegate = self; //协议
imagePicker.allowsEditing = YES;
imagePicker.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;
[self presentViewController:imagePicker animated:YES completion:nil];
}
}];
//系统相机拍照
UIAlertAction *photoAction = [UIAlertAction actionWithTitle:@“相机” style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]){
UIImagePickerController * imagePicker = [[UIImagePickerController alloc]init];
imagePicker.delegate = self;
imagePicker.allowsEditing = YES;
imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;
[self presentViewController:imagePicker animated:YES completion:nil];
}
}];
UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:@“取消” style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {
}];
[userIconActionSheet addAction:albumAction];
[userIconActionSheet addAction:photoAction];
[userIconActionSheet addAction:cancelAction];
[self presentViewController:userIconActionSheet animated:YES completion:nil];
}

3.代理方法
#pragma mark - 调用系统相册及拍照功能实现方法

• (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info{
  UIImage *img = [info objectForKey:UIImagePickerControllerEditedImage];//获取到所选择的照片
  TtitleImageCell *cell = [self.table cellForRowAtIndexPath:[NSIndexPath indexPathForRow:0 inSection:0]];
  cell.img.image = img;
  UIImage *compressImg = [self imageWithImageSimple:img scaledToSize:CGSizeMake(60, 60)];//对选取的图片进行大小上的压缩
  [self transportImgToServerWithImg:compressImg]; //将裁剪后的图片上传至服务器
  [self dismissViewControllerAnimated:YES completion:nil];

}

//用户取消选取时调用,可以用来做一些事情

• (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker{
  [picker dismissViewControllerAnimated:YES completion:nil];
  }

//压缩图片方法

• (UIImage*)imageWithImageSimple:(UIImage*)image scaledToSize:(CGSize)newSize{
  UIGraphicsBeginImageContext(newSize);
  [image drawInRect:CGRectMake(0,0,newSize.width,newSize.height)];
  UIImage* newImage = UIGraphicsGetImageFromCurrentImageContext();
  UIGraphicsEndImageContext();
  return newImage;
  }

4.上传图片
//上传图片至服务器后台

• (void)transportImgToServerWithImg:(UIImage *)img{
  NSData *imageData;
  NSString *mimetype;
  //判断下图片是什么格式
  if (UIImagePNGRepresentation(img) != nil) {
  mimetype = @“image/png”;
  imageData = UIImagePNGRepresentation(img);
  }else{
  mimetype = @“image/jpeg”;
  imageData = UIImageJPEGRepresentation(img, 1.0);
  }

  // 调用服务，上传图片数据
  }

5.在info.plist文件中添加权限
Privacy - Photo Library Usage Description
App需要您的同意,才能访问相册,用于上传头像等功能
Privacy - Camera Usage Description
App需要您的同意,才能访问相机,用于上传头像等功能
Privacy - Media Libaray Usage Description
App需要您的同意,才能使用媒体资源库

标签：UIAlertAction,img,self,ios,UIImagePickerController,imagePicker,YES,上传,客户端
来源： https://blog.csdn.net/liudan302698481/article/details/109955386