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

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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