iOS开发一行代码搞定缓存计算及清除缓存

 1 //
 2 //  gzhCache.h
 3 //  cache
 4 //
 5 //  Created by 郭志贺 on 2020/5/27.
 6 //  Copyright © 2020 郭志贺. All rights reserved.
 7 //
 8 
 9 #import <Foundation/Foundation.h>
10 
11 NS_ASSUME_NONNULL_BEGIN
12 
13 @interface gzhCache : NSObject
14 
15 /// 计算缓存大小
16 +(float)filePath;
17 
18 /// 清理缓存
19 +(void)clearCache;
20 @end
21 
22 NS_ASSUME_NONNULL_END

 1 //
 2 //  gzhCache.m
 3 //  cache
 4 //
 5 //  Created by 郭志贺 on 2020/5/27.
 6 //  Copyright © 2020 郭志贺. All rights reserved.
 7 //
 8 
 9 #import "gzhCache.h"
10 
11 @implementation gzhCache
12 // 显示缓存大小
13 + (float)filePath {
14     NSString * cachPath = [ NSSearchPathForDirectoriesInDomains ( NSCachesDirectory , NSUserDomainMask , YES ) firstObject ];
15     
16     return [ self folderSizeAtPath :cachPath];
17 }
18 //计算单个文件的大小
19 + (long long) fileSizeAtPath:( NSString *) filePath{
20     NSFileManager * manager = [ NSFileManager defaultManager ];
21     if ([manager fileExistsAtPath :filePath]){
22         return [[manager attributesOfItemAtPath :filePath error : nil ] fileSize ];
23     }
24     return 0 ;
25 }
26 //遍历文件夹获得文件夹大小，返回多少M
27 + (float)folderSizeAtPath:(NSString *)folderPath{
28     NSFileManager * manager = [ NSFileManager defaultManager ];
29     if (![manager fileExistsAtPath :folderPath]) return 0 ;
30     NSEnumerator *childFilesEnumerator = [[manager subpathsAtPath :folderPath] objectEnumerator ];
31     NSString * fileName;
32     long long folderSize = 0 ;
33     while ((fileName = [childFilesEnumerator nextObject ]) != nil ){
34         NSString * fileAbsolutePath = [folderPath stringByAppendingPathComponent :fileName];
35         folderSize += [ self fileSizeAtPath :fileAbsolutePath];
36     }
37     return folderSize/( 1024.0 * 1024.0 );
38 }
39 //清理缓存
40 + (void)clearCache {
41     NSString * cachPath = [ NSSearchPathForDirectoriesInDomains ( NSCachesDirectory , NSUserDomainMask , YES ) firstObject ];
42     NSArray * files = [[ NSFileManager defaultManager ] subpathsAtPath :cachPath];
43     NSLog ( @"cachpath = %@" , cachPath);
44     for ( NSString * p in files) {
45         NSError * error = nil ;
46         NSString * path = [cachPath stringByAppendingPathComponent :p];
47         if ([[ NSFileManager defaultManager ] fileExistsAtPath :path]) {
48             [[ NSFileManager defaultManager ] removeItemAtPath :path error :&error];
49         }
50     }
51     [ self performSelectorOnMainThread : @selector (clearCachSuccess) withObject : nil waitUntilDone : YES ];
52 }
53 + (void)clearCachSuccess {
54     NSLog(@"清理成功");
55 }
56 @end