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问题:

I want to use an image for the UISlider track. I don't want one color on the left of the thumb, and another color on the right. I just want one static image across the whole track. Possible?

回答1:

For setting the image to your slider you can use the setMinimumTrackImage, setMaximumTrackImage methods. For your requirement set both to same image.

iOS 5 and Below

UIImage *sliderTrackImage = [[UIImage imageNamed: @"Slider.png"] stretchableImageWithLeftCapWidth: 7 topCapHeight: 0];

[mySlider setMinimumTrackImage: sliderTrackImage forState: UIControlStateNormal];
[mySlider setMaximumTrackImage: sliderTrackImage forState: UIControlStateNormal];

iOS 5+

UIImage *sliderTrackImage = [[UIImage imageNamed:@"Slider.png"] resizableImageWithCapInsets:UIEdgeInsetsMake(0, 7, 0, 0)];

[mySlider setMinimumTrackImage: sliderTrackImage forState: UIControlStateNormal];
[mySlider setMaximumTrackImage: sliderTrackImage forState: UIControlStateNormal];

For more please check these links:

User Interface Customisation Tutorial
http://jasonlawton.com/blog/customizing-uislider-in-iphone/
Custom UISlider
Slider image

回答2:

[[UISlider appearance] setThumbImage:[UIImage imageNamed:@"ball.png"] forState:UIControlStateNormal];
[slider setMinimumTrackImage:[[UIImage imageNamed:@"volume_slider_oragne.png"] stretchableImageWithLeftCapWidth:0.3 topCapHeight:0.0] forState:UIControlStateNormal];
[slider setMaximumTrackImage:[[UIImage imageNamed:@"volume_strap_gry.png"] stretchableImageWithLeftCapWidth:0.3 topCapHeight:0.0] forState:UIControlStateNormal];

回答3:

Just set both sides to the same image. You might want to make two separate images with the same color/pattern if you want the rounded corners on the ends.