UISlider setMaximumTrackTintColor [英] UISlider setMaximumTrackTintColor

问题描述

我正在尝试在UISlider上动态配置轨道颜色。

I'm trying to dynamically configure the track color on a UISlider.

这行代码非常适合设置滑块轨道的低端。

This line of code works perfectly for setting the low side of the slider track.

[self.sliderBar setMinimumTrackTintColor：[UIColor redColor]];

当尝试对滑块轨道的高端做同样的事情时，这行代码会向调试日志报告3个致命错误。

When trying to do the same thing for the high side of the slider track, this line of code reports 3 fatal errors to the debug log.

[self.sliderBar setMaximumTrackTintColor：[UIColor redColor]];

<Error>: CGContextAddPath: invalid context 0x0. This is a serious error. This application, or a library it uses, is using an invalid context  and is thereby contributing to an overall degradation of system stability and reliability. This notice is a courtesy: please fix this problem. It will become a fatal error in an upcoming update.

<Error>: clip: invalid context 0x0. This is a serious error. This application, or a library it uses, is using an invalid context  and is thereby contributing to an overall degradation of system stability and reliability. This notice is a courtesy: please fix this problem. It will become a fatal error in an upcoming update.

<Error>: CGContextDrawLinearGradient: invalid context 0x0. This is a serious error. This application, or a library it uses, is using an invalid context  and is thereby contributing to an overall degradation of system stability and reliability. This notice is a courtesy: please fix this problem. It will become a fatal error in an upcoming update.

我还尝试使用点表示法设置轨道色调颜色，但报告了相同的3个错误。

I have also tried to set the track tint colors using dot notation, but the same 3 errors were reported.

self.sliderBar.maximumTrackTintColor = [UIColor redColor];

我很困惑为什么最小轨道色调颜色被正确设置，而最大轨道色调颜色正在破碎。任何帮助将不胜感激。

I am very confused why the minimum track tint color is properly set, while the maximum track tint color is breaking. Any assistance would be greatly appreciated.

此问题似乎与这个问题，但我不是100％肯定，因为我不使用图形（只设置色调）。

This issue seems to be related to this question, but I'm not 100% sure since I'm not working with graphics (only setting the tint color).

推荐答案

这很奇怪，min和max对我来说都很好，我甚至可以让它变为动画颜色变化。我所能建议的是重新创建滑块和@synthesize。

That is strange, both min and max work fine for me and I can even have it animate color change. All I can suggest is re-create the slider and also @synthesize.

@synthesize slider;

- (void)viewDidLoad
{
[super viewDidLoad];
[slider setMinimumTrackTintColor:[UIColor orangeColor]];
[slider setMaximumTrackTintColor:[UIColor blueColor]];



// Do any additional setup after loading the view, typically from a nib.
}

这篇关于UISlider setMaximumTrackTintColor的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！