自定義UISlider圖像消失了嗎？

Question

你好，我有一個自定義圖像，以取代UISLider defult按鈕圖像，所有工作良好的圖像顯示，它不剪輯。問題是，當我使用滑塊上下移動圖像消失，並且有些時候不再出現。有人可以修復嗎？

CGRect rect = CGRectMake(16.0, 390.0, 297.0, 35.0); 
slider.frame = rect; 

UIImage* thumbImage = [UIImage imageNamed:@"thumb.png"]; 
[slider setThumbImage:thumbImage forState:UIControlStateNormal]; 

UIImage* leftImage = [UIImage imageNamed:@"SliderLeft.png"]; 
[slider setMinimumTrackImage:leftImage forState:UIControlStateNormal]; 

UIImage* rightImage = [UIImage imageNamed:@"SliderRight.png"]; 
[slider setMaximumTrackImage:rightImage forState:UIControlStateNormal]; 

Answer 1

我相信你需要設置高亮顯示狀態的圖像，以及：

[slider setThumbImage:thumb forState:UIControlStateNormal];  
[slider setThumbImage:thumb forState:UIControlStateHighlighted];