ios中从相册/相机中获取图片信息

从相册中获取图片的信息

UIImagePickerController *imgPickView = [[UIImagePickerController alloc] init];//获取相册的类

    imgPickView.delegate = self;//设置delegate

    imgPickView.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;//设置获取相册中的图片的方法

    imgPickView.modalTransitionStyle = UIModalTransitionStyleCoverVertical;//设置显示出这个视图的方式

    imgPickView.allowsEditing = YES;//设置这个视图是可以被编辑

    [self presentViewController:imgPickView animated:YES completion:nil];//将这个视图推入view中

从照相机中获取图片信息

//从摄像头中获取图片（和从相片中获取信息，差不多）

    UIImagePickerController *imgpickView = [[UIImagePickerController alloc] init];

    imgpickView.delegate = self;

    imgpickView.sourceType = UIImagePickerControllerSourceTypeCamera;//将这个类型设置为照相机中获取信息

    imgpickView.modalTransitionStyle = UIModalTransitionStyleCoverVertical;

    imgpickView.allowsEditing = YES;

    [self presentViewController:imgpickView animated:YES completion:nil];

下面是几个属性是modalTransitionStyle中可以选择的集中属性类型

     ● UIModalTransitionStyleCoverVertical：画面从下向上徐徐弹出，关闭时向下隐

          藏（默认方式）。

      ● UIModalTransitionStyleFlipHorizontal：从前一个画面的后方，以水平旋转的方

          式显示后一画面。

      ● UIModalTransitionStyleCrossDissolve：前一画面逐渐消失的同时，后一画面逐渐显示。

设置完了这个view之后，我们还需要设置一个delegate中的函数

#pragma mark- UIImagePickerControllerDelegate

    - (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info{

    UIImage *image= [info objectForKey:@"UIImagePickerControllerOriginalImage"];//获取图片信息

    if (picker.sourceType == UIImagePickerControllerSourceTypeCamera)//如果是照相功能的话，还需要保存图片

    {

        UIImageWriteToSavedPhotosAlbum(image, nil, nil, nil);

    }

    //设置路径，储存图片，（这个步骤可有可无）

    NSString *path = [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) firstObject];

    NSString *pathImg = [path stringByAppendingString:@"/img.img"];

    NSLog(@"%@", pathImg);

    NSData *imgData = UIImagePNGRepresentation(image);

    [imgData writeToFile:pathImg atomically:YES];

    [self dismissViewControllerAnimated:YES completion:nil];

    }

    - (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker{

    //按取消键，进行的操作

    [self dismissViewControllerAnimated:YES completion:nil];

    }