标签：
// 显示缓存大小
//NSDocumentDirectory Document目录中的数据
//NSCachesDirectory 缓存中的数据
- ( float )filePath
{
//NSDocumentDirectory Document目录中的数据
//NSCachesDirectory 缓存中的数据
NSString * cachPath = [ NSSearchPathForDirectoriesInDomains ( NSCachesDirectory , NSUserDomainMask , YES ) firstObject ];
UIAlertView * alertView = [[ UIAlertView alloc ] initWithTitle : @" 提示 " message : [NSString stringWithFormat:@"%f",[ self folderSizeAtPath :cachPath]] delegate : nil cancelButtonTitle : @" 确定 " otherButtonTitles : nil ];
[alertView show ];
return [ self folderSizeAtPath :cachPath];
}
//2: 遍历文件夹获得文件夹大小，返回多少 M（提示：你可以在工程界设置（)m）
//2: 遍历文件夹获得文件夹大小，返回多少 M（提示：你可以在工程界设置（)m）
- ( float ) folderSizeAtPath:( NSString *) folderPath{
NSFileManager * manager = [ NSFileManager defaultManager ];
if (![manager fileExistsAtPath :folderPath]) return 0 ;
NSEnumerator *childFilesEnumerator = [[manager subpathsAtPath :folderPath] objectEnumerator ];
NSString * fileName;
long long folderSize = 0 ;
while ((fileName = [childFilesEnumerator nextObject ]) != nil ){
NSString * fileAbsolutePath = [folderPath stringByAppendingPathComponent :fileName];
folderSize += [ self fileSizeAtPath :fileAbsolutePath];
}
return folderSize/( 1024.0 * 1024.0 );
}
//3:首先我们计算一下 单个文件的大小
- (long ) fileSizeAtPath:( NSString *) filePath{
NSFileManager * manager = [ NSFileManager defaultManager ];
if ([manager fileExistsAtPath :filePath]){
return [[manager attributesOfItemAtPath :filePath error : nil ] fileSize ];
}
return 0 ;
}
// 清理缓存 方法一
- ( void )clearFile { //NSDocumentDirectory Document目录中的数据 //NSCachesDirectory 缓存中的数据 NSString * cachPath = [ NSSearchPathForDirectoriesInDomains ( NSCachesDirectory , NSUserDomainMask , YES ) firstObject ]; NSArray * files = [[ NSFileManager defaultManager ] subpathsAtPath :cachPath]; NSLog ( @"cachpath = %@" , cachPath); for ( NSString * p in files) { NSError * error = nil ; NSString * path = [cachPath stringByAppendingPathComponent :p]; if ([[ NSFileManager defaultManager ] fileExistsAtPath :path]) { [[ NSFileManager defaultManager ] removeItemAtPath :path error :&error]; } } [ self performSelectorOnMainThread : @selector (clearCachSuccess) withObject : nil waitUntilDone : YES ]; } - ( void )clearCachSuccess { NSLog ( @" 清理成功 " ); UIAlertView * alertView = [[ UIAlertView alloc ] initWithTitle : @" 提示 " message : @" 缓存清理完毕 " delegate : nil cancelButtonTitle : @" 确定 " otherButtonTitles : nil ]; [alertView show ]; //[ _tableView reloadData ];//清理完之后重新导入数据 }
方法二
//清除缓存
- (void)clear
{
dispatch_async(
dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0)
, ^{
NSString *cachPath = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory,NSUserDomainMask, YES) objectAtIndex:0];
NSArray *files = [[NSFileManager defaultManager] subpathsAtPath:cachPath];
// NSLog(@"files :%d",[files count]);
for (NSString *p in files) {
NSError *error;
NSString *path = [cachPath stringByAppendingPathComponent:p];
if ([[NSFileManager defaultManager] fileExistsAtPath:path]) {
[[NSFileManager defaultManager] removeItemAtPath:path error:&error];
}
}
[self performSelectorOnMainThread:@selector(clearCacheSuccess) withObject:nil waitUntilDone:YES];});
}
-(void)clearCacheSuccess
{
NSLog(@"清除缓存");
}
标签：
原文地址：http://www.cnblogs.com/kakadekafuka/p/4651986.html
