iOS清除缓存

[objc] view plaincopy

1. #pragma mark === 暂时不用清除缓存=====
2. -(void)myClearCacheAction{
3. dispatch_async(
4. dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0)
5. , ^{
6. NSString *cachPath = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) objectAtIndex:0];
7. NSArray *files = [[NSFileManager defaultManager] subpathsAtPath:cachPath];
8. NSLog(@"files :%lu",(unsigned long)[files count]);
9. for (NSString *p in files) {
10. NSError *error;
11. NSString *path = [cachPath stringByAppendingPathComponent:p];
12. if ([[NSFileManager defaultManager] fileExistsAtPath:path]) {
13. [[NSFileManager defaultManager] removeItemAtPath:path error:&error];
14. }
15. }
16. [self performSelectorOnMainThread:@selector(clearCacheSuccess) withObject:nil waitUntilDone:YES];});
17. }
18. -(void)clearCacheSuccess
19. {
20. NSLog(@"清理成功");
21. }
22. //获取缓存大小。。
23. CGFloat fileSize = [self folderSizeAtPath:cachePath];
24. dispatch_async(dispatch_get_main_queue(), ^{
25. cache.subtitle = [NSString stringWithFormat:@"%.2fMB",fileSize];
26. [self.tableView reloadData];
27. });
28. - (CGFloat)folderSizeAtPath:(NSString *)folderPath
29. {
30. NSFileManager *manager = [NSFileManagerdefaultManager];
31. if (![manager fileExistsAtPath:folderPath]) {
32. return 0;
33. }
34. NSEnumerator *childFilesEnumerator = [[manager subpathsAtPath:folderPath] objectEnumerator];
35. NSString *fileName = nil;
36. long long folderSize = 0;
37. while ((fileName = [childFilesEnumerator nextObject]) != nil) {
38. NSString *fileAbsolutePath = [folderPath stringByAppendingPathComponent:fileName];
39. folderSize += [self fileSizeAtPath:fileAbsolutePath];
40. }
41. return folderSize/(1024.0*1024.0);
42. }
43. - (long long)fileSizeAtPath:(NSString *)filePath
44. {
45. NSFileManager* manager = [NSFileManagerdefaultManager];
46. if ([manager fileExistsAtPath:filePath]){
47. return [[manager attributesOfItemAtPath:filePath error:nil] fileSize];
48. }
49. return 0;
50. }