我将如何从对象数组中获取特定点

How would I get specific points from an object array?

本文关键字：获取 数组 对象      更新时间：2023-09-26

我有一个JSON文件，其中包含一个对象数组，该数组基本上是在画布上绘制线条。 我正在尝试编写一个脚本，该脚本在控制台中显示单击线条时具有的点。 我认为以下脚本会起作用，但它没有。 有人知道我该怎么做吗？

杰伦 

[{
"lines": {
        "width": 3,
        "stroke": "#FFFFFF",
        "x1": [825.853, 804.33, 590.5, 890.682, 379.421, 582.81, 853.391, 575.932, 566.508, 834.161, 770.832, 504.225, 584.83, 601.055, 549.104, 477.494, 597.43, 640.386, 867.994, 563.965, 621.281, 904.754, 853.391, 475.435, 360.025, 478.058, 843.323, 818.653, 819.061],
        "y1": [476.233, 485.06, 467.266, 84.389, 269.767, 257.901, 120.505, 399.223, 577.706, 409.69, 257.348, 366.667, 403.409, 482.969, 257.638, 367.334, 141.663, 258.163, 258.163, 258.163, 177.563, 84.389, 120.505, 111.271, 84.389, 84.389, 84.389, 499.195, 409.69],
        "x2": [866.613, 804.33, 646.069, 209.797, 379.421, 582.81, 869.23, 575.932, 611, 849.251, 770.832, 504.225, 622.517, 601.055, 504.225, 477.494, 597.43, 816.364, 938.393, 604.272, 621.281, 946.752, 843.323, 212.46, 360.025, 478.058, 843.323, 804.33, 803.378],
        "y2": [515.418, 514.898, 467.266, 84.389, 308.815, 214.216, 120.505, 377.24, 577.706, 409.69, 111.778, 466.158, 403.409, 434.29, 257.638, 484.136, 111.271, 258.163, 258.163, 258.163, 203.205, 84.389, 120.505, 111.271, 236.059, 331.048, 136.993, 499.195, 409.69],
        "x3": [866.613, 646.592, 646.069, 209.797, 344.739, 380.026, 869.23, 793.075, 611, 849.251, 621.281, 548.612, 622.517, 589.5, 504.225, 548.717, 480.333],
        "y3": [534.787, 514.898, 394.513, 577.706, 308.815, 214.216, 99.814, 377.24, 498.668, 499.195, 111.778, 466.158, 467.789, 434.29, 330.985, 484.136, 111.271],
        "x4": [645.021, 646.592, 804.436, 566.508, 344.739, 380.026, 896.501, 793.075, 590.25, 833.488, 621.281],
        "y4": [534.787, 483.493, 394.513, 577.706, 557.043, 235, 99.814, 84.389, 498.668, 499.195, 141.663],
        "x5": [645.021, 592, 804.436, 566.508, 556.571, 380.026, 896.501],
        "y5": [586.081, 483.493, 421.315, 565.144, 557.043, 236.059, 89.553],
        "x6": [191.216],
        "y6": [586.081],
        "x7": [191.216],
        "y7": [111.271],
        "x8": [209.797],
        "y8": [111.271]
    }
}]

.JS

var lines = result[0].lines;
$(lines).on("click", function(){
    var test = $(this).find(back_lines.x1);
    console.log(test);
})

截至目前，控制台上没有打印任何内容。

在您的代码中$(lines).on("click",..)函数仅在onclick事件期间调用。

请找到代码：

var result = [{
"lines": {
    "width": 3,
    "stroke": "#FFFFFF",
    "x1": [825.853, 804.33, 590.5, 890.682, 379.421, 582.81, 853.391, 575.932, 566.508, 834.161, 770.832, 504.225, 584.83, 601.055, 549.104, 477.494, 597.43, 640.386, 867.994, 563.965, 621.281, 904.754, 853.391, 475.435, 360.025, 478.058, 843.323, 818.653, 819.061],
    "y1": [476.233, 485.06, 467.266, 84.389, 269.767, 257.901, 120.505, 399.223, 577.706, 409.69, 257.348, 366.667, 403.409, 482.969, 257.638, 367.334, 141.663, 258.163, 258.163, 258.163, 177.563, 84.389, 120.505, 111.271, 84.389, 84.389, 84.389, 499.195, 409.69],
    "x2": [866.613, 804.33, 646.069, 209.797, 379.421, 582.81, 869.23, 575.932, 611, 849.251, 770.832, 504.225, 622.517, 601.055, 504.225, 477.494, 597.43, 816.364, 938.393, 604.272, 621.281, 946.752, 843.323, 212.46, 360.025, 478.058, 843.323, 804.33, 803.378],
    "y2": [515.418, 514.898, 467.266, 84.389, 308.815, 214.216, 120.505, 377.24, 577.706, 409.69, 111.778, 466.158, 403.409, 434.29, 257.638, 484.136, 111.271, 258.163, 258.163, 258.163, 203.205, 84.389, 120.505, 111.271, 236.059, 331.048, 136.993, 499.195, 409.69],
    "x3": [866.613, 646.592, 646.069, 209.797, 344.739, 380.026, 869.23, 793.075, 611, 849.251, 621.281, 548.612, 622.517, 589.5, 504.225, 548.717, 480.333],
    "y3": [534.787, 514.898, 394.513, 577.706, 308.815, 214.216, 99.814, 377.24, 498.668, 499.195, 111.778, 466.158, 467.789, 434.29, 330.985, 484.136, 111.271],
    "x4": [645.021, 646.592, 804.436, 566.508, 344.739, 380.026, 896.501, 793.075, 590.25, 833.488, 621.281],
    "y4": [534.787, 483.493, 394.513, 577.706, 557.043, 235, 99.814, 84.389, 498.668, 499.195, 141.663],
    "x5": [645.021, 592, 804.436, 566.508, 556.571, 380.026, 896.501],
    "y5": [586.081, 483.493, 421.315, 565.144, 557.043, 236.059, 89.553],
    "x6": [191.216],
    "y6": [586.081],
    "x7": [191.216],
    "y7": [111.271],
    "x8": [209.797],
    "y8": [111.271]
}
}];
 var lines = result[0].lines;
 console.log(lines);
 for(var a in lines){
    if(a=='x1'){
    console.log(a);
    console.log(lines[a]);
 }
}
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