关于iOS开发中清理缓存的设置
//获取缓存文件夹(注意:NSCachesDirectory是缓存文件夹)
NSString *cachesPath =NSSearchPathForDirectoriesInDomains(NSCachesDirectory,NSUserDomainMask, YES).lastObject;
//获取缓存的大小
[self folderSizeAtPath:cachesPath];
//清理缓存
[self clearCache:cachesPath];
//计算单个文件的大小
-(float)fileSizeAtPath:(NSString *)path{
NSFileManager *fileManager=[NSFileManager defaultManager];
if([fileManager fileExistsAtPath:path]){
long long size=[fileManager attributesOfItemAtPath:path error:nil].fileSize;
return size/1024.0/1024.0;
}
return 0;
}
//计算目录的大小
-(float)folderSizeAtPath:(NSString *)path{
NSFileManager *fileManager=[NSFileManager defaultManager];
float folderSize;
if ([fileManager fileExistsAtPath:path]) {
NSArray *childerFiles=[fileManager subpathsAtPath:path];
for (NSString *fileNamein childerFiles) {
NSString *absolutePath=[path stringByAppendingPathComponent:fileName];
folderSize += [selffileSizeAtPath:absolutePath];
}
//SDWebImage框架自身计算缓存的实现
folderSize+=[[SDImageCache sharedImageCache] getSize]/1024.0/1024.0;
return folderSize;
}
return 0;
}
//进行清理
- (void)clearCache:(NSString *)path{
NSFileManager *fileManager=[NSFileManager defaultManager];
if ([fileManager fileExistsAtPath:path]) {
NSArray *childerFiles=[fileManager subpathsAtPath:path];
for (NSString *fileNamein childerFiles) {
//如有需要,加入条件,过滤掉不想删除的文件
NSString *absolutePath=[path stringByAppendingPathComponent:fileName];
[fileManager removeItemAtPath:absolutePath error:nil];
}
}
}