单击轨道时，输入范围滑块在 iOS Safari 上不起作用

Question

I have a pretty straight-forward range input slider. It works pretty well on all browsers except on iOS Safari.

The main problem I have is when I click on the slider track, it doesn't move the slider. It merely highlights the slider. It works fine when dragging the thumb. Any ideas on how to fix this?

<div class="slider-wrap">
    <div id="subtractBtn"></div>
    <input type="range" class="slider">
    <div id="addBtn"></div>
</div>

Answer 1

For those still looking for a javascript only fix like I did. I ended up just making a "polyfill" for this; it relies on the max attribute of the slider and determines the best step to force the input range on iOS. You can thank me later :)

 var diagramSlider = document.querySelector(".diagram-bar"); function iosPolyfill(e) { var val = (e.pageX - diagramSlider.getBoundingClientRect().left) / (diagramSlider.getBoundingClientRect().right - diagramSlider.getBoundingClientRect().left), max = diagramSlider.getAttribute("max"), segment = 1 / (max - 1), segmentArr = []; max++; for (var i = 0; i < max; i++) { segmentArr.push(segment * i); } var segCopy = segmentArr.slice(), ind = segmentArr.sort((a, b) => Math.abs(val - a) - Math.abs(val - b))[0]; diagramSlider.value = segCopy.indexOf(ind) + 1; } if (!!navigator.platform.match(/iPhone|iPod|iPad/)) { diagramSlider.addEventListener("touchend", iosPolyfill, {passive: true}); }

 <input type="range" max="6" min="1" value="1" name="diagram selector" class="diagram-bar" />

Answer 2

Add the CSS property, -webkit-tap-highlight-color: transparent to the CSS of the element or the complete html page. This will remove the troublesome highlight effect on an element when it is tapped on a mobile device.

Answer 3

从http://touchpunch.furf.com/添加jQuery UI触控功能

Answer 4

Safari 5.1 + should support type "range" fully - so it's weird it's not working. did you try adding min/max/step values ? what about trying to use only the pure HTML attribute without any classes that might interfere - try pasting this code and run it on a Safari browser

<input type="range" min="0" max="3.14" step="any">

• it should be working - if it does, it's probably something related to your css, if not try using one of the pure HTML examples here:

https://developer.mozilla.org/en-US/docs/Web/HTML/Element/input/range

Answer 5

Enhanced version of the solution presented by Cameron Gilbert. This implementation works for sliders with a min value set to a negative number and optional a step size set.

For those not working with typescript I leave it to you to convert to plain javascript.

if (!!navigator.platform.match(/iPhone|iPad|iPod/)) {
mySlider.addEventListener(
    "touchend",
    (touchEvent: TouchEvent) => {
        var element = touchEvent.srcElement as HTMLInputElement;
        if (element.min && element.max && touchEvent.changedTouches && touchEvent.changedTouches.length > 0) {
            const max = Number(element.max);
            const min = Number(element.min);
            let step = 1;
            if (element.step) {
                step = Number(element.step);
            }
            //Calculate the complete range of the slider.
            const range = max - min;

            const boundingClientRect = element.getBoundingClientRect();
            const touch = touchEvent.changedTouches[0];

            //Calculate the slider value
            const sliderValue = (touch.pageX - boundingClientRect.left) / (boundingClientRect.right - boundingClientRect.left) * range + min;

            //Find the closest valid slider value in respect of the step size
            for (let i = min; i < max; i += step) {
                if (i >= sliderValue) {
                    const previousValue = i - step;
                    const previousDifference = sliderValue - previousValue;
                    const currentDifference = i - sliderValue;
                    if (previousDifference > currentDifference) {
                        //The sliderValue is closer to the previous value than the current value.
                        element.value = previousValue.toString();
                    } else {
                        element.value = i.toString();
                    }

                    //Trigger the change event.
                    element.dispatchEvent(new Event("change"));
                    break;
                }
            }
        }
    },
    {
        passive: true
    }
);

}

Answer 6

Try using jQuery Mobile ? The workaround is obnoxious, and I'm pretty sure there's no way to use the native interface with standard HTML. It appears from other threads, you could do an elaborate CSS/JS solution.