javascript - 如何在 Titanium Appcelerator 中创建圆形进度条？

Question

我正在使用 Titanium Appcelerator，我需要帮助在应用程序中创建圆形进度条。谁能解释一下圆形进度条是如何工作的以及进度如何以循环方式填充在圆圈内..？

Answer 1

请立即使用此合金小部件: https://github.com/manumaticx/circularprogress

---

原始答案

我知道这有点晚了，但我在大约一天的工作后发现了这一点。

• 我没有在 Android 上测试过
• 这不是动画，因为我不需要它来满足我的需要。要使其动画化，请查看函数中的倒数第二行layer3.transform = Ti.UI.create2DMatrix().rotate(angle);您应该能够设置旋转 Angular 动画。

var win = Ti.UI.createWindow({ 宽度:'100%', 高度:'100%' }); win.open();

function circularProgressBar(options)
{
    var opts = options;
    if (opts.percent == null || opts.percent > 1 || opts.percent < 0) opts.percent = 1;
    if (opts.size == null) opts.size = 46;
    if (opts.margin == null) opts.margin = 4;
    if (opts.backgroundColor == null) opts.backgroundColor = '#fff';
    if (opts.progressColor == null) opts.progressColor = '#4ba818';
    if (opts.topper == null) opts.topper = {};
    if (opts.topper.color == null) opts.topper.color = '#fff';
    if (opts.topper.size == null) opts.topper.size = 36;
    if (opts.font == null) opts.font = {};
    if (opts.font.visible == null) opts.font.visible = true;
    if (opts.font.size == null) opts.font.size = 12;
    if (opts.font.color == null) opts.font.color = '#900';
    if (opts.font.shadowColor == null) opts.font.shadowColor = '#aaa';
    if (opts.font.shadowRadius == null) opts.font.shadowRadius = 1;
    if (opts.font.shadowOffset == null) opts.font.shadowOffset = {};
    if (opts.font.shadowOffset.x == null) opts.font.shadowOffset.x = 0;
    if (opts.font.shadowOffset.y == null) opts.font.shadowOffset.y = 1;

    var mainHolder = Ti.UI.createView({
        left: options.left,
        right: options.right,
        top: options.top,
        bottom: options.bottom,
        width: opts.size + opts.margin,
        height: opts.size + opts.margin,
        borderRadius: (opts.size + opts.margin) / 2,
        backgroundColor: opts.backgroundColor
    });

    var holder = Ti.UI.createView({
        width: opts.size,
        height: opts.size,
        borderRadius: opts.size / 2
    });


    var layer1 = Ti.UI.createView({
        width: opts.size,
        height: opts.size,
        borderRadius: opts.size / 2,
        backgroundColor: opts.progressColor
    });

    var layer2 = Ti.UI.createView({
        left: 0,
        width: opts.size / 2,
        height: opts.size,
        anchorPoint: {
            x: 1,
            y: 0.5
        },
        backgroundColor: opts.backgroundColor
    });

    var layer3 = Ti.UI.createView({
        right: 0,
        width: opts.size / 2,
        height: opts.size,
        anchorPoint: {
            x: 0,
            y: 0.5
        },
        backgroundColor: opts.backgroundColor
    });

    var layer4 = Ti.UI.createView({
        right: 0,
        width: opts.size / 2,
        height: opts.size,
        anchorPoint: {
            x: 0,
            y: 0.5
        },
        backgroundColor: opts.progressColor
    });

    var topper = Ti.UI.createView({
        width: opts.topper.size,
        height: opts.topper.size,
        borderRadius: opts.topper.size / 2,
        backgroundColor: opts.topper.color
    });

    var percentText = Ti.UI.createLabel({
        visible: opts.font.visible,
        width: Ti.UI.SIZE,
        height: Ti.UI.SIZE,
        color: opts.font.color,
        font: {
            fontSize:opts.font.size
        },
        shadowColor: opts.font.shadowColor,
        shadowRadius: opts.font.shadowRadius,
        shadowOffset: {
            x: opts.font.shadowOffset.x,
            y: opts.font.shadowOffset.y
        },
        textAlign: Ti.UI.TEXT_ALIGNMENT_CENTER,
        text: (opts.percent * 100) + '%'
    });

    mainHolder.add(holder);
    topper.add(percentText);    
    holder.add(layer1);
    holder.add(layer2);
    holder.add(layer3);
    holder.add(layer4);
    holder.add(topper);

    var percent = opts.percent;
    var angle = 360 * percent;
    layer2.visible = (angle > 180) ? false : true;
    layer4.visible = (angle > 180) ? true : false;
    layer3.transform = Ti.UI.create2DMatrix().rotate(angle);
    return mainHolder;  
}

/* Circular Progress Bar Options

 percent: A value between 0 and 1
 size: The size of the circular progress bar
 margin: The margin of the circular progress bar
 backgroundColor: The backgroundColor of the circular area
 progressColor: The backgroundColor of the progress bar
 --
 topper.color: The center circle color
 topper.size: The size of the center circle
 ---
 font.visible: Boolean to display the font or not
 font.color: The font color
 font.size: The fontSize
 font.shadowColor: The font shadow color
 font.shadowRadius: The font shadow radius
 font.shadowOffset.x: The x value of the shadow shadowOffset
 font.shadowOffset.y: The y value of the shadow shadowOffset

 */
var circleProgress1 = circularProgressBar({
    top:50,
    percent:0.35,
    size:46,
    margin:4,
    backgroundColor:'#fff',
    progressColor:'#4ba818',
    topper: {
        color:'#fff',
        size: 36
    },
    font: {
        visible: true,
        color: '#900',
        size: 12,
        shadowColor: '#aaa',
        shadowRadius: 1,
        shadowOffset: {
            x: 0,
            y: 1
        }
    }
});
win.add(circleProgress1);

所有 ^^^ 创造了这个:

编辑:我用来创建这个的方法来自马尔科姆的这个线程的想法:https://developer.appcelerator.com/question/154274/is-there-a-way-to-create-circular-progress-bar