iOS清除缓存
-(UITableViewCell*)tableView:(UITableView*)tableView cellForRowAtIndexPath:(NSIndexPath*)indexPath
{
staticNSString*identifier =@"myCell";
UITableViewCell*cell=[tableViewdequeueReusableCellWithIdentifier:identifier];
if(cell ==nil){
cell=[[UITableViewCellalloc]initWithStyle:UITableViewCellStyleValue1reuseIdentifier:identifier];
}
cell.textLabel.text=@"清除缓存";
NSString*bundleId=[[[NSBundlemainBundle]infoDictionary]objectForKey:@"CFBundleIdentifier"];
NSArray*paths=NSSearchPathForDirectoriesInDomains(NSCachesDirectory,NSUserDomainMask,YES);
NSString*path=[[pathsobjectAtIndex:0]stringByAppendingPathComponent:bundleId];
CGFloatsize =[selffolderSizeAtPath:path];
if(size> 10)
{
if(size< 1000)
{
cell.detailTextLabel.text=[NSStringstringWithFormat:@"%.0fB",size];
} else if(size< 1000 * 1000){
cell.detailTextLabel.text=[NSStringstringWithFormat:@"%.2fKB",size/ 1000];
}else{
cell.detailTextLabel.text= [NSStringstringWithFormat:@"%.2fMB",size/ 1000 / 1000];
}
}else{
cell.detailTextLabel.text= @"";
}
}
-(void)tableView:(UITableView*)tableView didSelectRowAtIndexPath:(NSIndexPath*)indexPath
{
NSString*bundleId=[[[NSBundlemainBundle]infoDictionary]objectForKey:@"CFBundleIdentifier"];
NSArray*paths=NSSearchPathForDirectoriesInDomains(NSCachesDirectory,NSUserDomainMask,YES);
NSString*path=[[pathsobjectAtIndex:0]stringByAppendingPathComponent:bundleId];
[[NSFileManagerdefaultManager]removeItemAtPath:patherror:nil];
UIAlertView*alertCache=[[UIAlertViewalloc]initWithTitle:nilmessage:@"缓存清楚成功"delegate:nilcancelButtonTitle:@"确定"otherButtonTitles:nil,nil];
[alertCacheshow];
[tableViewreloadData];
}
计算文件大小
#pragmamark -get filesize
- (longlong)fileSizeAtPath:(NSString*)filePath{
NSFileManager*manager=[NSFileManagerdefaultManager];
if([manager fileExistsAtPath:filePath]){
return[[managerattributesOfItemAtPath:filePatherror:nil]fileSize];
}
return 0;
}
- (float) folderSizeAtPath:(NSString*)folderPath{
NSFileManager*manager=[NSFileManagerdefaultManager];
if(![manager fileExistsAtPath:folderPath])return 0;
NSEnumerator*childFilesEnumerator = [[managersubpathsAtPath:folderPath]objectEnumerator];
NSString*fileName;
longlongfolderSize = 0;
while((fileName =[childFilesEnumerator nextObject])!= nil){
NSString*fileAbsolutePath =[folderPath stringByAppendingPathComponent:fileName];
folderSize+= [selffileSizeAtPath:fileAbsolutePath];
}
returnfolderSize;
}
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