iOS新手 SDWebImage 清除缓存方法

//清除缓存

• (float)checkTmpSize;

- (float)checkTmpSize {

float totalSize = 0;

NSDirectoryEnumerator *fileEnumerator = [[NSFileManager defaultManager] enumeratorAtPath:_diskCachePath];

for (NSString *fileName in fileEnumerator) {

NSString *filePath = [_diskCachePath stringByAppendingPathComponent:fileName];

NSDictionary *attrs = [[NSFileManager defaultManager] attributesOfItemAtPath:filePath error:nil];

unsigned long long length = [attrs fileSize];

totalSize += length / 1024.0 / 1024.0;

}

NSLog(@"tmp size is %.2fM",totalSize);

return totalSize;

}

#import "SDImageCache.h"

CGFloat s = [[SDImageCache sharedImageCache] checkTmpSize];

cell.lLabel.text = [NSString stringWithFormat:@"%.2fMB",s];
```
```
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{

if (indexPath.section == 0 && indexPath.row == 0) {

UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"提示" message:@"确定要清除缓存么" delegate:self cancelButtonTitle:@"取消"otherButtonTitles:@"清除", nil];

alert.tag = 100;

[alert show];

}

}

- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex
{

switch (buttonIndex) {

case 0:

break;

case 1:

[[SDImageCache sharedImageCache] clearDiskOnCompletion:^{

//                [CHNotices noticesWithTitle:@"删除成功" Time:1 View:self.view Style:CHNoticesStyleSuccess];

NSLog(@"123121234412412412");

[self.tableView reloadData];

}];

break;

}

}
```