iOS开发一行代码搞定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。