自定义修改iPhone相机界面

很多情况下，我们需要自定义系统的相机拍照界面， 以下示例代码可以实现定制相机界面， 具体UI自己可以加入

- (void) setup: (UIView *) aView
{
    //获取相机界面的view
    self.plcameraview = [aView subviewWithClass:NSClassFromString(@"PLCameraView")];
    if (!plcameraview) return;

    //相机原有控件全部透明
    NSArray *svarray = [plcameraview subviews];
    for (int i = 1; i < svarray.count; i++)    [[svarray objectAtIndex:i] setAlpha:0.0f];
    
    //加入自己的UI界面
#if 1
    self.navbar = [[[UINavigationBar alloc] initWithFrame:CGRectMake(0.0f, 0.0f, 320.0f, 44.0f)] autorelease];
    UINavigationItem *navItem = [[[UINavigationItem alloc] init] autorelease];
    navItem.rightBarButtonItem = BARBUTTON(@"Shoot", @selector(shoot:));
    navItem.leftBarButtonItem = BARBUTTON(@"Cancel", @selector(dismiss:));
    
    [(UINavigationBar *)self.navbar pushNavigationItem:navItem animated:NO];
    [plcameraview addSubview:self.navbar];
#endif
}

//启动相机
- (void) getStarted: (id) sender
{
    UIImagePickerController *ipc = [[UIImagePickerController alloc] init];
    ipc.sourceType =  UIImagePickerControllerSourceTypeCamera;
    [self presentModalViewController:ipc animated:YES];    
    [self performSelector:@selector(setup:) withObject:ipc.view afterDelay:0.5f];
}