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。