我正在实施photoalbum，我想从相册中选择图像，然后去编辑图像页面和裁剪图像像iphone一样制作矩形和显示矩阵一样在iphone 4s中我可以调整大小但我只看到一个大的长方形 我使用这段代码
if([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary])
{
UIImagePickerController *picker=[[UIImagePickerController alloc]init];
picker.delegate=(id)self;
picker.allowsEditing=YES;
picker.sourceType=UIImagePickerControllerSourceTypePhotoLibrary;
[self presentModalViewController:picker animated:YES];
和这个代表
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
}