Several ways to clean up the cache in iOS

iOS cleans up the cache in several ways, with the need for friends to refer to the following:

1. Calculate File Size:

-(Long Long) Filesizeatpath: (nsstring*) filepath{

nsfilemanager* manager = [Nsfilemanager Defaultmanager];

if ([manager Fileexistsatpath:filepath]) {

return [[Manager Attributesofitematpath:filepath Error:nil] fileSize];

}

return 0;

}

2. Calculate the folder size:

//Traversal folder to get the folder size, return how many 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);

}

3. Clear the first type of cache

-(void) Action: (ID) sender

{

Completely clear the cache the first method

UIButton * button = sender;

[Button settitle:@ "clean up" forstate:uicontrolstatenormal];

Nsarray *paths = Nssearchpathfordirectoriesindomains (Nslibrarydirectory, Nsuserdomainmask, YES);

NSString *path = [Paths lastobject];



NSString *str = [nsstring stringwithformat:@ "cache cleared%.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];

}

}

4.SDImage third-party methods of clearing the cache: (Generally, the cache of images is cleared)

[[Sdimagecache Sharedimagecache] cleardisk]; Clear Disk Cache

[[Sdimagecache Sharedimagecache] clearmemory]; Clear Memory Cache

5. Turn on multithreading to clear the cache:

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 (@ "clean success");

}

Several ways to clean up the cache in iOS