uniapp Android和iOS 获取App缓存、清除缓存

1、获取本机缓存

// 获取缓存
       formatSize() {
            plus.cache.calculate((size) => {
                let sizeCache = parseInt(size);
                if (sizeCache == 0) {
                    this.fileSizeString = "0B";
                } else if (sizeCache < 1024) {
                    this.fileSizeString = sizeCache + "B";
                } else if (sizeCache < 1048576) {
                    this.fileSizeString = (sizeCache / 1024).toFixed(2) + "KB";
                } else if (sizeCache < 1073741824) {
                    this.fileSizeString = (sizeCache / 1048576).toFixed(2) + "MB";
                } else {
                    this.fileSizeString = (sizeCache / 1073741824).toFixed(2) + "GB";
                }
            });
        },

2、清除缓存

    clearStorage() {
            uni.showModal({
                title: '清除缓存',
                content: '您确定要清除缓存吗？',
                success: (res) => {
                    if (res.confirm) {
                        console.log('用户点击确定');
                        this.clearCache();
                    } else if (res.cancel) {
                        console.log('用户点击取消');
                    }
                }
            });
        },

3、清理缓存

    clearCache() {
            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]; 
                    plus.io.resolveLocalFileSystemURL(filePath, (entry) => {
                        if (entry.isDirectory) {
                            entry.removeRecursively((entry)  => { 
                                uni.showToast({
                                    title: '缓存清理完成',
                                    duration: 2000
                                });
                                this.formatSize();  
                            }, (e) => {
                                console.log(e.message)
                            });
                        } else {
                            entry.remove();
                        }
                    }, (e) => {
                        console.log('文件路径读取失败')
                    });
                }
            } else { // ios  
                plus.cache.clear(() =>{
                    uni.showToast({
                        title: '缓存清理完成',
                        duration: 2000
                    });
                    this.formatSize();
                });
            }
        }

本文只做记录学习使用；原文：https://blog.csdn.net/weixin_63515766/article/details/133676748