#pragma mark - 計(jì)算緩存大小
- (NSString *)getCacheSize
{
//定義變量存儲(chǔ)總的緩存大小
long long sumSize = 0;
//01.獲取當(dāng)前圖片緩存路徑
NSString *cacheFilePath = [NSHomeDirectory() stringByAppendingPathComponent:@"Library/Caches"];
//02.創(chuàng)建文件管理對(duì)象
NSFileManager *filemanager = [NSFileManager defaultManager];
//獲取當(dāng)前緩存路徑下的所有子路徑
NSArray *subPaths = [filemanager subpathsOfDirectoryAtPath:cacheFilePath error:nil];
//遍歷所有子文件
for (NSString *subPath in subPaths) {
//1）.拼接完整路徑
NSString *filePath = [cacheFilePath stringByAppendingFormat:@"/%@",subPath];
//2）.計(jì)算文件的大小
long long fileSize = [[filemanager attributesOfItemAtPath:filePath error:nil]fileSize];
//3）.加載到文件的大小
sumSize += fileSize;
}
float size_m = sumSize/(1000*1000);
return [NSString stringWithFormat:@"%.2fM",size_m];
}
#pragma mark - 清除緩存提示（UITableViewDataSourceDelegate）
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
if (indexPath.row == 0) {
UIAlertView *alertView = [[UIAlertView alloc]initWithTitle:@"緩存清除" message:@"確定清除緩存?" delegate:self cancelButtonTitle:@"取消" otherButtonTitles:@"確定",nil];
[alertView show];
}
}
#pragma mark - UIAlertViewDelegate方法實(shí)現(xiàn)
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{
NSLog(@"代碼執(zhí)行到此");
//判斷點(diǎn)擊的是確認(rèn)鍵
if (buttonIndex == 1) {
//01......
NSFileManager *fileManager = [NSFileManager defaultManager];
//02.....
NSString *cacheFilePath = [NSHomeDirectory() stringByAppendingPathComponent:@"Library/Caches"];
//03......
[fileManager removeItemAtPath:cacheFilePath error:nil];
//04刷新第一行單元格
NSIndexPath *indexPath = [NSIndexPath indexPathForItem:0 inSection:0];
[_tableView reloadRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationFade];
//05 ：04和05使用其一即可
[_tableView reloadData];//刷新表視圖
}
@pragma -mark -放置于.m文件首段較為合適，本DEMO僅做功能性展示，實(shí)時(shí)監(jiān)測(cè)緩存大小，從其他界面跳轉(zhuǎn)到本頁(yè)面，也需要刷新下表視圖
- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:YES];
[_tableView reloadData];
}