//清除緩存按鈕的點(diǎn)擊事件- (void)putBufferBtnClicked:(UIButton *)btn{    //調(diào)用方法計(jì)算目錄大小    CGFloat size = [self folderSizeAtPath:NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES).lastObject] + [self folderSizeAtPath:NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES).lastObject] + [self folderSizeAtPath:NSTemporaryDirectory()];         NSString *message = size > 1 ? [NSString stringWithFormat:@"緩存%.2fM, 刪除緩存", size] : [NSString stringWithFormat:@"緩存%.2fK, 刪除緩存", size * 1024.0];        UIAlertController *alert = [UIAlertController alertControllerWithTitle:nil message:message PReferredStyle:(UIAlertControllerStyleAlert)];        UIAlertAction *action = [UIAlertAction actionWithTitle:@"確定" style:(UIAlertActionStyleDefault) handler:^(UIAlertAction *action) {                //調(diào)用方法刪除緩存     [self cleanCaches];            }];        UIAlertAction *cancel = [UIAlertAction actionWithTitle:@"取消" style:(UIAlertActionStyleCancel) handler:nil];    [alert addAction:action];    [alert addAction:cancel];    [self showDetailViewController:alert sender:nil];} // 計(jì)算目錄大小- (CGFloat)folderSizeAtPath:(NSString *)path{    // 利用NSFileManager實(shí)現(xiàn)對(duì)文件的管理    NSFileManager *manager = [NSFileManager defaultManager];    CGFloat size = 0;    if ([manager fileExistsAtPath:path]) {        // 獲取該目錄下的文件，計(jì)算其大小        NSArray *childrenFile = [manager subpathsAtPath:path];        for (NSString *fileName in childrenFile) {            NSString *absolutePath = [path stringByAppendingPathComponent:fileName];            size += [manager attributesOfItemAtPath:absolutePath error:nil].fileSize;        }        // 將大小轉(zhuǎn)化為M        return size / 1024.0 / 1024.0;    }    return 0;} // 根據(jù)路徑刪除文件- (void)cleanCaches:(NSString *)path{    // 利用NSFileManager實(shí)現(xiàn)對(duì)文件的管理    NSFileManager *fileManager = [NSFileManager defaultManager];    if ([fileManager fileExistsAtPath:path]) {        // 獲取該路徑下面的文件名        NSArray *childrenFiles = [fileManager subpathsAtPath:path];        for (NSString *fileName in childrenFiles) {            // 拼接路徑            NSString *absolutePath = [path stringByAppendingPathComponent:fileName];            // 將文件刪除            [fileManager removeItemAtPath:absolutePath error:nil];        }    }轉(zhuǎn)載自點(diǎn)擊打開(kāi)鏈接