我如何随机化我的背景图像 React Native

How i can randomise my background image React Native

我想随机化文件夹中图像的 return,但出现错误 'Invalid call'

我的函数:

  returnGif = () => {
    min = Math.ceil(1);
    max = Math.floor(53);
    const gifNumber = Math.floor(Math.random() * (max - min +1)) + min;
    var gifFont = require('../config/Images/Gifs/' + gifNumber + '_2.png');
    if (gifFont) {
        if (Math.random()>0.5) gifFont = require('../config/Images/Gifs/' + gifNumber + '_2.png');
        else gifFont = require('../config/Images/Gifs/' + gifNumber + '.png');
    }
    else gifFont = require('../config/Images/Gifs/' + gifNumber + '.png');
    return gifFont;
  }

在react native中,目前不支持require中的动态路径。

您需要导入所有图像,然后用例进行随机化

例如

 function getavatarImage(avatar) {
  switch (avatar) {
   case "spiderman":
    return require('./spiderman.png');
   case "batman":
    return require('./batman.png');
   case "hulk":
    return require('./hulk.png');
   default:
    return require('./no-image.png');
 }
}