如何在我的iPhone应用程序中拍照？

Question

我正在使用Xcode中的Cocoa编写iPhone应用程序。我找不到任何教程或示例代码来展示如何使用内置相机拍照。我该怎么做？在哪里可以找到好的信息？

谢谢！

- Mr PhotoGuy

Answer 1

只需将以下代码复制并粘贴到您的项目中，即可获得完全实现的功能。

其中takePhoto和chooseFromLibrary是我自己的方法名称，将在按钮触摸时调用。

确保引用适当按钮的插座到这些方法。

   -(IBAction)takePhoto :(id)sender

{
        UIImagePickerController *imagePickerController = [[UIImagePickerController alloc] init];

        if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera])
        {
            [imagePickerController setSourceType:UIImagePickerControllerSourceTypeCamera];
        }

        // image picker needs a delegate,
        [imagePickerController setDelegate:self];

    // Place image picker on the screen
    [self presentModalViewController:imagePickerController animated:YES];
}



-(IBAction)chooseFromLibrary:(id)sender
{

    UIImagePickerController *imagePickerController= [[UIImagePickerController alloc] init]; 
    [imagePickerController setSourceType:UIImagePickerControllerSourceTypePhotoLibrary];

    // image picker needs a delegate so we can respond to its messages
    [imagePickerController setDelegate:self];

    // Place image picker on the screen
    [self presentModalViewController:imagePickerController animated:YES];

}

//delegate methode will be called after picking photo either from camera or library
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{   
    [self dismissModalViewControllerAnimated:YES]; 
    UIImage *image = [info objectForKey:UIImagePickerControllerOriginalImage];

    [myImageView setImage:image];    // "myImageView" name of any UIImageView.
}

- W.S

Answer 2

使用UIImagePickerController。这里有一个很好的教程。

http://www.zimbio.com/iPhone/articles/1109/Picking+Images+iPhone+SDK+UIImagePickerController

您应该将源类型设置为UIImagePickerControllerSourceTypeCamera或UIImagePickerControllerSourceTypePhotoLibrary。请注意，这两种类型会在屏幕上产生非常不同的显示效果。应仔细测试两者。特别是，如果您将UIImagePickerController嵌套在UINavigationController中，则如果不小心，可能会出现多个导航栏和其他奇怪的效果。

另请参见此帖子

- Airsource Ltd

Answer 3

UIImagePickerController 类允许你拍照或从照片库中选择图片。将源类型指定为 UIImagePickerControllerSourceTypeCamera。

另请参阅此先前提出的问题: 使用 iPhone SDK 访问相机。

- jblocksom

Answer 4

@WQS发布的答案可以正常工作，但其中包含一些在iOS 6中已被弃用的方法。以下是适用于iOS 6及以上版本的更新答案：

-(void)takePhoto
{
    UIImagePickerController *imagePickerController = [[UIImagePickerController alloc] init];

    if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera])
    {
        [imagePickerController setSourceType:UIImagePickerControllerSourceTypeCamera];
    }

    // image picker needs a delegate,
    [imagePickerController setDelegate:self];

    // Place image picker on the screen
    [self presentViewController:imagePickerController animated:YES completion:nil];
}



-(void)chooseFromLibrary
{

    UIImagePickerController *imagePickerController= [[UIImagePickerController alloc]init];
    [imagePickerController setSourceType:UIImagePickerControllerSourceTypePhotoLibrary];

    // image picker needs a delegate so we can respond to its messages
    [imagePickerController setDelegate:self];

    // Place image picker on the screen
    [self presentViewController:imagePickerController animated:YES completion:nil];

}

//delegate methode will be called after picking photo either from camera or library
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
    [self dismissViewControllerAnimated:YES completion:nil];
    UIImage *image = [info objectForKey:UIImagePickerControllerOriginalImage];

[myImageView setImage:image];    // "myImageView" name of any UImageView.
}

不要忘记在你的视图控制器.h文件中添加以下内容：

@interface myVC<UINavigationControllerDelegate, UIImagePickerControllerDelegate>

- Prince Agrawal

Answer 5

这是我用来为我的应用程序拍照的代码

- (IBAction)takephoto:(id)sender {

    picker = [[UIImagePickerController alloc] init];
    picker.delegate = self;
    [picker setSourceType:UIImagePickerControllerSourceTypeCamera];
    [self presentViewController:picker animated:YES completion:NULL];


}
-(void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
    img = [info objectForKey:@"UIImagePickerControllerOriginalImage"];
    [imageview setImage:img];
    [self dismissViewControllerAnimated:YES completion:NULL];
}

如果你想重新拍照，只需简单地添加这个函数。

-(void)imagePickerControllerDidCancel:(UIImagePickerController *)picker
{
    [self dismissViewControllerAnimated:YES completion:NULL];
}

- Sabrina Tuli