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[操作系统]iOS 用 SDWebImage 清理图片缓存


具体效果如下

 

 

1.找到 SDWebImage找到SDImageCache类

添加如下方法

- (float)checkTmpSize{  float totalSize = 0;  NSDirectoryEnumerator *fileEnumerator = [[NSFileManager defaultManager] enumeratorAtPath:_diskCachePath];  for (NSString *fileName in fileEnumerator)  {    NSString *filePath = [_diskCachePath stringByAppendingPathComponent:fileName];        NSDictionary *attrs = [[NSFileManager defaultManager] attributesOfItemAtPath:filePath error:nil];        unsigned long long length = [attrs fileSize];        totalSize += length / 1024.0 / 1024.0;  }  //  NSLog(@"tmp size is %.2f",totalSize);    return totalSize;}

具体用tableView实现

#import <UIKit/UIKit.h>@interface MoreViewController : UITableViewController<UITableViewDelegate,UITableViewDataSource>@end

#import "MoreViewController.h"@interface MoreViewController ()@property(nonatomic,strong)NSArray *titleMore;@property(nonatomic,strong)NSArray *image;@property(nonatomic,assign)NSIndexPath* indexPath;@property(nonatomic,strong)UILabel *lbl;@property(nonatomic,assign)float mpSize;@end@implementation MoreViewController- (void)viewDidLoad {  [super viewDidLoad];  self.navigationItem.title=@"更多";  self.titleMore=@[@"清除缓存",@"给个评价",@"商务合作",@"检测新版本",@"欢迎页",@"关于"];  self.image=@[@"moreClear",@"moreScore",@"moreBusiness",@"moreVersion",@"moreWelcome",@"moreAbout"];  self.tableView.backgroundColor=[UIColor blackColor];  self.tableView.scrollEnabled=NO;  [self.tableView registerClass:[UITableViewCell class] forCellReuseIdentifier:@"More"];  self.lbl=[[UILabel alloc]init];  self.lbl.textColor=[UIColor whiteColor]; }- (void)didReceiveMemoryWarning {  [super didReceiveMemoryWarning];}-(NSInteger)numberOfSectionsInTableView:(UITableView *)tableView{  return 1;}-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{  return self.titleMore.count;}-(UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{   UITableViewCell *cell=[tableView dequeueReusableCellWithIdentifier:@"More" forIndexPath:indexPath];    if (indexPath.row==0) {     self.lbl.text=[NSString stringWithFormat:@"缓存为%.2fMB",[[SDImageCache sharedImageCache] checkTmpSize]];    self.lbl.frame=CGRectMake(200, 10, 200, 10);    [cell addSubview:self.lbl];  }  cell.imageView.image=[UIImage imageNamed:self.image[indexPath.row]];  cell.textLabel.text=self.titleMore[indexPath.row];  cell.textLabel.textColor=[UIColor whiteColor];  cell.backgroundColor=[UIColor blackColor];  return cell;  }- (void)viewWillAppear:(BOOL)animated{  [super viewWillAppear:YES];  [self.tableView reloadData];}//弹出框 确定是否清除缓存-(void)alertView{  NSLog(@"----");  float tmpSize=[[SDImageCache sharedImageCache] checkTmpSize];  UIAlertController *alert=[UIAlertController alertControllerWithTitle:@"提示" message:[NSString stringWithFormat:@"清理缓存(%.2fM)",tmpSize] preferredStyle:UIAlertControllerStyleAlert];  UIAlertAction *ok=[UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {    [[SDImageCache sharedImageCache] clearDisk];//    [self.tableView reloadRowsAtIndexPaths:@[self.indexPath] withRowAnimation:UITableViewRowAnimationFade];    [self.tableView reloadData];  }];    UIAlertAction *cancle=[UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleDefault handler:nil];    [alert addAction:ok];  [alert addAction:cancle];  [self presentViewController:alert animated:YES completion:nil];}// 选择第一列-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{  if (indexPath.row==0) {    [self alertView];  }}/*#pragma mark - Navigation// In a storyboard-based application, you will often want to do a little preparation before navigation- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {  // Get the new view controller using [segue destinationViewController].  // Pass the selected object to the new view controller.}*/@end