uniapp清除应用缓存

计算缓存

// 计算缓存
formatSize() {
 let that = this;
 plus.cache.calculate(function(size) {
  let sizeCache = parseInt(size);
  if (sizeCache == 0) {
     that.fileSizeString = "0B";
  } else if (sizeCache < 1024) {
     that.fileSizeString = sizeCache + "B";
  } else if (sizeCache < 1048576) {
     that.fileSizeString = (sizeCache / 1024).toFixed(2) + "KB";
  } else if (sizeCache < 1073741824) {
     that.fileSizeString = (sizeCache / 1048576).toFixed(2) + "MB";
  } else {
     that.fileSizeString = (sizeCache / 1073741824).toFixed(2) + "GB";
  }
    console.log('缓存大小',that.fileSizeString) 
  });
},

下面是清除缓存

// 清理缓存
clearCache() {
    let that = this;
    let os = plus.os.name;
    if (os == 'Android') {
        let main = plus.android.runtimeMainActivity();
        let sdRoot = main.getCacheDir();
        let files = plus.android.invoke(sdRoot, "listFiles");
        let len = files.length;
        for (let i = 0; i < len; i++) {
            let filePath = '' + files[i]; // 没有找到合适的方法获取路径，这样写可以转成文件路径  
            plus.io.resolveLocalFileSystemURL(filePath, function(entry) {
                if (entry.isDirectory) {
                    entry.removeRecursively(function(entry) { //递归删除其下的所有文件及子目录  
                        uni.showToast({
                            title: '缓存清理完成',
                            duration: 2000
                        });
                        that.formatSize(); // 重新计算缓存  
                    }, function(e) {
                        console.log(e.message)
                    });
                } else {
                    entry.remove();
                }
            }, function(e) {
                console.log('文件路径读取失败')
            });
        }
    } else { // ios  
        plus.cache.clear(function() {
            uni.showToast({
                title: '缓存清理完成',
                duration: 2000
            });
            that.formatSize();
        });
    }
},

https://blogs.kongjz.com/details/50