iOS调用系统相册选取图片

//1创建UIImagePickerController对象

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

    //2.设置选择图片的资源地

    [pickerVC setSourceType:UIImagePickerControllerSourceTypePhotoLibrary];

    //3.允许编辑

    pickerVC.allowsEditing = YES;

    //4.设置代理

    [pickerVC setDelegate:self];

    //5.弹出相册

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

    //6.释放所有权

    [pickerVC release];