- (void)getCacheSize
{// 总大小unsigned long long size = 0;// 获得缓存文件夹路径NSString *cachesPath = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES).lastObject;NSString *dirpath = [cachesPath stringByAppendingPathComponent:@"MP3"];// 文件管理者NSFileManager *mgr = [NSFileManager defaultManager];// 获得文件夹的大小  == 获得文件夹中所有文件的总大小
//    XMGLog(@"contents - %@", [mgr contentsOfDirectoryAtPath:dirpath error:nil]);NSArray *subpaths = [mgr subpathsAtPath:dirpath];for (NSString *subpath in subpaths) {// 全路径NSString *fullSubpath = [dirpath stringByAppendingPathComponent:subpath];// 累加文件大小size += [mgr attributesOfItemAtPath:fullSubpath error:nil].fileSize;//        NSDictionary *attrs = [mgr attributesOfItemAtPath:fullSubpath error:nil];
//        size += [attrs[NSFileSize] unsignedIntegerValue];}NSLog(@"%zd", size);
}

//声明
- (unsigned long long)fileSize;//实现
- (unsigned long long)fileSize
{// 总大小unsigned long long size = 0;// 文件管理者NSFileManager *mgr = [NSFileManager defaultManager];// 是否为文件夹BOOL isDirectory = NO;// 路径是否存在BOOL exists = [mgr fileExistsAtPath:self isDirectory:&isDirectory];if (!exists) return size;if (isDirectory) { // 文件夹// 获得文件夹的大小  == 获得文件夹中所有文件的总大小NSDirectoryEnumerator *enumerator = [mgr enumeratorAtPath:self];for (NSString *subpath in enumerator) {// 全路径NSString *fullSubpath = [self stringByAppendingPathComponent:subpath];// 累加文件大小size += [mgr attributesOfItemAtPath:fullSubpath error:nil].fileSize;}} else { // 文件size = [mgr attributesOfItemAtPath:self error:nil].fileSize;}return size;
}

//
//  JGClearCacheCell.h
//
//
//  Created by JG on 16/12/08.
//  Copyright © 2016年 JG. All rights reserved.
//#import <UIKit/UIKit.h>@interface JGClearCacheCell : UITableViewCell@end//
//  JGClearCacheCell.m
//
//
//  Created by JG on 16/12/08.
//  Copyright © 2016年 JG. All rights reserved.
//#import "JGClearCacheCell.h"
#import <SDImageCache.h>
#import <SVProgressHUD.h>#define JGCustomCacheFile [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES).lastObject stringByAppendingPathComponent:@"Custom"]@implementation JGClearCacheCell- (instancetype)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier
{if (self = [super initWithStyle:style reuseIdentifier:reuseIdentifier]) {// 设置cell右边的指示器(用来说明正在处理一些事情)UIActivityIndicatorView *loadingView = [[UIActivityIndicatorView alloc] initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleGray];[loadingView startAnimating];self.accessoryView = loadingView;// 设置cell默认的文字(如果设置文字之前userInteractionEnabled=NO, 那么文字会自动变成浅灰色)self.textLabel.text = @"清除缓存(正在计算缓存大小...)";// 禁止点击self.userInteractionEnabled = NO;//        int age = 10;
//        typeof(age) age2 = 10;//        __weak JGClearCacheCell * weakSelf = self;__weak typeof(self) weakSelf = self;// 在子线程计算缓存大小dispatch_async(dispatch_get_global_queue(0, 0), ^{[NSThread sleepForTimeInterval:2.0];// 获得缓存文件夹路径unsigned long long size = JGCustomCacheFile.fileSize;size += [SDImageCache sharedImageCache].getSize;// 如果cell已经销毁了, 就直接返回if (weakSelf == nil) return;NSString *sizeText = nil;if (size >= pow(10, 9)) { // size >= 1GBsizeText = [NSString stringWithFormat:@"%.2fGB", size / pow(10, 9)];} else if (size >= pow(10, 6)) { // 1GB > size >= 1MBsizeText = [NSString stringWithFormat:@"%.2fMB", size / pow(10, 6)];} else if (size >= pow(10, 3)) { // 1MB > size >= 1KBsizeText = [NSString stringWithFormat:@"%.2fKB", size / pow(10, 3)];} else { // 1KB > sizesizeText = [NSString stringWithFormat:@"%zdB", size];}// 生成文字NSString *text = [NSString stringWithFormat:@"清除缓存(%@)", sizeText];// 回到主线程dispatch_async(dispatch_get_main_queue(), ^{// 设置文字weakSelf.textLabel.text = text;// 清空右边的指示器weakSelf.accessoryView = nil;// 显示右边的箭头weakSelf.accessoryType = UITableViewCellAccessoryDisclosureIndicator;// 添加手势监听器[weakSelf addGestureRecognizer:[[UITapGestureRecognizer alloc] initWithTarget:weakSelf action:@selector(clearCache)]];// 恢复点击事件weakSelf.userInteractionEnabled = YES;});});}return self;
}/***  清除缓存*/
- (void)clearCache
{// 弹出指示器[SVProgressHUD showWithStatus:@"正在清除缓存..." maskType:SVProgressHUDMaskTypeBlack];// 删除SDWebImage的缓存[[SDImageCache sharedImageCache] clearDiskOnCompletion:^{// 删除自定义的缓存dispatch_async(dispatch_get_global_queue(0, 0), ^{NSFileManager *mgr = [NSFileManager defaultManager];[mgr removeItemAtPath:JGCustomCacheFile error:nil];[mgr createDirectoryAtPath:JGCustomCacheFile withIntermediateDirectories:YES attributes:nil error:nil];// 所有的缓存都清除完毕dispatch_async(dispatch_get_main_queue(), ^{// 隐藏指示器[SVProgressHUD dismiss];// 设置文字self.textLabel.text = @"清除缓存(0B)";});});}];
}/***  当cell重新显示到屏幕上时, 也会调用一次layoutSubviews*/
- (void)layoutSubviews
{[super layoutSubviews];// cell重新显示的时候, 继续转圈圈UIActivityIndicatorView *loadingView = (UIActivityIndicatorView *)self.accessoryView;[loadingView startAnimating];
}@end