iOS清除所有缓存的实例代码
本文介绍了iOS清除所有缓存的实例代码,分享给大家,具体如下:
计算缓存
NSString *libPath = NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES)[0]; CGFloat fileSize=[self folderSizeAtPath:libPath]; - (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); } - (long long)fileSizeAtPath:(NSString*) filePath{ NSFileManager* manager = [NSFileManager defaultManager]; if ([manager fileExistsAtPath:filePath]){ return [[manager attributesOfItemAtPath:filePath error:nil] fileSize]; } return 0; }
清除缓存
- (void)action:(id)sender { NSArray *paths = NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES); NSString *path = [paths lastObject]; NSArray *files = [[NSFileManager defaultManager] subpathsAtPath:path]; for (NSString *p in files) { NSError *error; NSString *Path = [path stringByAppendingPathComponent:p]; if ([[NSFileManager defaultManager] fileExistsAtPath:Path]) { //清理缓存,保留Preference,里面含有NSUserDefaults保存的信息 if (![Path containsString:@"Preferences"]) { [[NSFileManager defaultManager] removeItemAtPath:Path error:&error]; } }else{ } } }
以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持海外IDC网。
【转自:韩国lg机房 http://www.558idc.com/lg.html欢迎留下您的宝贵建议】