iOS开发之1行代码实现缓存计算及清除缓存

话不多说，直接撸代码

//
// gzhcache.h
// cache
//
// created by 郭志贺 on 2020/5/27.
// copyright © 2020 郭志贺. all rights reserved.
//

#import <foundation/foundation.h>

ns_assume_nonnull_begin

@interface gzhcache : nsobject

/// 计算缓存大小
+(float)filepath;

/// 清理缓存
+(void)clearcache;
@end

ns_assume_nonnull_end

//
// gzhcache.m
// cache
//
// created by 郭志贺 on 2020/5/27.
// copyright © 2020 郭志贺. all rights reserved.
//

#import "gzhcache.h"

@implementation gzhcache
// 显示缓存大小
+ (float)filepath {
  nsstring * cachpath = [ nssearchpathfordirectoriesindomains ( nscachesdirectory , nsuserdomainmask , yes ) firstobject ];

  return [ self foldersizeatpath :cachpath];
}
//计算单个文件的大小
+ (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 );
}
//清理缓存
+ (void)clearcache {
  nsstring * cachpath = [ nssearchpathfordirectoriesindomains ( nscachesdirectory , nsuserdomainmask , yes ) firstobject ];
  nsarray * files = [[ nsfilemanager defaultmanager ] subpathsatpath :cachpath];
  nslog ( @"cachpath = %@" , cachpath);
  for ( nsstring * p in files) {
    nserror * error = nil ;
    nsstring * path = [cachpath stringbyappendingpathcomponent :p];
    if ([[ nsfilemanager defaultmanager ] fileexistsatpath :path]) {
      [[ nsfilemanager defaultmanager ] removeitematpath :path error :&error];
    }
  }
  [ self performselectoronmainthread : @selector (clearcachsuccess) withobject : nil waituntildone : yes ];
}
+ (void)clearcachsuccess {
  nslog(@"清理成功");
}
@end

需要查询大小的地方使用：

nsstring *str = [nsstring stringwithformat:@"%.2fm",[gzhcache filepath]];

清理的方法调用

[gzhcache clearcache];

 以上内容仅代表本菜鸟看法，复制可直接使用。如有不妥之处敬请告知。

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