IOS——选取相册中图片使用或使用照相机拍照后使用图片

1. 打开相册/打开照相机

UIImagePickerControllerSourceType sourceType=UIImagePickerControllerSourceTypeCamera;
if (![UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {
sourceType=UIImagePickerControllerSourceTypePhotoLibrary;
}

UIImagePickerController *ipc = [[UIImagePickerController alloc]init];
ipc.sourceType = UIImagePickerControllerSourceTypeSavedPhotosAlbum;
ipc.videoQuality = UIImagePickerControllerQualityTypeLow;
ipc.delegate = self;
ipc.allowsEditing = NO;
[self presentModalViewController:ipc animated:YES];

其中要注意的是ipc.sourceType

UIImagePickerControllerSourceTypePhotoLibrary：表示显示所有的照片

UIImagePickerControllerSourceTypeCamera：表示从摄像头选取照片

UIImagePickerControllerSourceTypeSavedPhotosAlbum：表示仅仅从相册中选取照片。

可以根据自己的需要定义该element

2. 显示图片/用户取消

- (void)imagePickerController: (UIImagePickerController *)picker
didFinishPickingMediaWithInfo: (NSDictionary *)info
{
UIImage *image = [info objectForKey:@"UIImagePickerControllerOriginalImage"];
[[UIView] setImage:image];
[self dismissModalViewControllerAnimated:YES];
}

// 用户选择取消
- (void) imagePickerControllerDidCancel: (UIImagePickerController *)picker
{
[self dismissModalViewControllerAnimated:YES];
[picker release];
}