iOS清理缓存的几种方法

 

 

- (long long) fileSizeAtPath:(NSString*) filePath{

NSFileManager* manager = [NSFileManager defaultManager];

if ([manager fileExistsAtPath:filePath]){

return [[manager attributesOfItemAtPath:filePath error:nil] fileSize];

}

return 0;

}

//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);

}

1. 清除缓存第一种

- (void)action:(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];

}

}

2. SDImage第三方清除缓存的方法

[[SDImageCache sharedImageCache] clearDisk];

[[SDImageCache sharedImageCache] clearMemory];

3. 彻底清除缓存第二种方法

dispatch_async(

dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0)

, ^{

NSString *cachPath = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) objectAtIndex:0];

NSLog(@"%@", cachPath);

NSArray *files = [[NSFileManager defaultManager] subpathsAtPath:cachPath];

NSLog(@"files :%d",[files count]);

for (NSString *p in files) {

NSError *error;

NSString *path = [cachPath stringByAppendingPathComponent:p];

if ([[NSFileManager defaultManager] fileExistsAtPath:path]) {

[[NSFileManager defaultManager] removeItemAtPath:path error:&error];

}

}

[self performSelectorOnMainThread:@selector(clearCacheSuccess) withObject:nil waitUntilDone:YES];});

}

-(void)clearCacheSuccess

{

NSLog(@"清理成功");

}