设置UISlider的刻度 [英] Setting tick marks for UISlider

问题描述

是否有任何方法可以为UISlider设置刻度线.NSSlider有一个叫做-(void)setNumberOfTickMarks:(NSInteger)numberOfTickMarks .但是，UISlider似乎没有一个.

Is there any method for setting tick marks for UISlider. NSSlider has something called - (void)setNumberOfTickMarks:(NSInteger)numberOfTickMarks. But UISlider does not appear to have one.

我想做的就是将滑块值设置为0、1、2、3、4等，如果说我将最小值设置为0，最大值设置为5.现在，这样的UISLider返回的值是0.0、0.1、0.2，0.3 4.8,4.9,5.0基于我在上面给出的示例.

What i want to do is get the slider values as 0,1,2,3,4 etc if say i set the min as 0 and max as 5. Now as such UISLider returns something like 0.0,0.1,0.2,0.3 etc 4.8,4.9,5.0 based on the example i gave above.

有帮助吗?

推荐答案

UISlider 没有任何刻度.

要获得您指定的行为，您必须将滑块返回的数字四舍五入到最接近的整数.

To get the behaviour you specify you'll have to round the number returned by the slider to the nearest integer.

因此，当您开始滑动时，滑块报告的值为0.1或0.2时，请将其四舍五入.直到达到0.5时，再向上舍入为1.

So when you start sliding, and the slider reports a value of 0.1 or 0.2, round that to 0. Until it hits 0.5, when you round up to 1.

然后，当滑块停止滑动时，可以将其值设置为四舍五入的数字，这将使滑块对齐"到该位置，就像捕捉到刻度线一样.

Then when the slider stops sliding, you can set it's value to the number you rounded to, which will make the slider "snap" to that position, kind like snapping to a tick mark.

如果要使用视觉标记，则必须自己实现.

If you want visual tickmarks, you'll have to implement that yourself.

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