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/** * 清理缓存第二种方法
*
* @param sender <#sender description#>
*/
- (void)clearCache:(id)sender
{ //彻底清除缓存第一种方法
UIButton * button = sender;
[button setTitle:@"清理完毕" forState:UIControlStateNormal];
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES);
NSString *path = [paths lastObject];
NSString *str = [NSString stringWithFormat:@"缓存已清除%.1fM", [self folderSizeAtPath:path]];
NSLog(@"%@",str);
NSArray *files = [[NSFileManager defaultManager] subpathsAtPath:path];
for (NSString *p in files) {
NSError *error;
NSString *Path = [path stringByAppendingPathComponent:p];
if ([[NSFileManager defaultManager] fileExistsAtPath:Path]) {
[[NSFileManager defaultManager] removeItemAtPath:Path error:&error];
}
}
}/** * 计算单个文件大小
*/
- (long long) fileSizeAtPath:(NSString*) filePath{
NSFileManager* manager = [NSFileManager defaultManager];
if ([manager fileExistsAtPath:filePath]){
return [[manager attributesOfItemAtPath:filePath error:nil] fileSize];
}
return 0;
}/** * 计算目录大小 遍历文件夹获得文件夹大小，返回多少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);
} |
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