直接上demo
LYFielService.h
@interface LYFielService : NSObject
//计算单个文件大小
+(float)fileSizeAtPath:(NSString *)path;
//清理缓存文件
+(void)clearCache:(NSString *)path;
//计算目录大小
+(float)folderSizeAtPath:(NSString *)path;
//缓存路径
+(NSString *)getPath;
@end
LYFielService.m
#import "LYFielService.h"
#import <SDWebImage/SDImageCache.h>
@implementation LYFielService
//计算单个文件大小
+(float)fileSizeAtPath:(NSString *)path{
NSFileManager *fileManager=[NSFileManager defaultManager];
if([fileManager fileExistsAtPath:path]){
long long size=[fileManager attributesOfItemAtPath:path error:nil].fileSize;
return size/1024.0/1024.0;
}
return 0;
}
//清理缓存文件
+(void)clearCache:(NSString *)path{
NSFileManager *fileManager=[NSFileManager defaultManager];
if ([fileManager fileExistsAtPath:path]) {
NSArray *childerFiles=[fileManager subpathsAtPath:path];
for (NSString *fileName in childerFiles) {
//如有需要,加入条件,过滤掉不想删除的文件
NSString *absolutePath=[path stringByAppendingPathComponent:fileName];
[fileManager removeItemAtPath:absolutePath error:nil];
}
}
// [[SDImageCache sharedImageCache] clearDisk]; //关键是这句 4.0之后没有该方法 则直接使用下面的方法即可
[[SDImageCache sharedImageCache]clearDiskOnCompletion:nil];
}
//计算目录大小
+(float)folderSizeAtPath:(NSString *)path{
NSFileManager *fileManager=[NSFileManager defaultManager];
float folderSize;
if ([fileManager fileExistsAtPath:path]) {
NSArray *childerFiles=[fileManager subpathsAtPath:path];
for (NSString *fileName in childerFiles) {
NSString *absolutePath=[path stringByAppendingPathComponent:fileName];
folderSize +=[LYFielService fileSizeAtPath:absolutePath];
}
//SDWebImage框架自身计算缓存的实现
folderSize+=[[SDImageCache sharedImageCache] getSize]/1024.0/1024.0;
return folderSize;
}
return 0;
}
//缓存路径
+(NSString *)getPath {
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);
NSString *path = [paths lastObject];
return path;
}
@end
在Controller的应用
#pragma mark - Life Cycle
- (void)viewWillAppear:(BOOL)animated{
[super viewWillAppear:YES];
[self.tableView reloadData];
}
#pragma mark - <UITableViewDataSource,UITableViewDelegate>
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:SettingCellID];
if (!cell) {
cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleValue1 reuseIdentifier:SettingCellID]; ;
}
cell.selectionStyle = UITableViewCellSelectionStyleNone;
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
return cell;
cell.detailTextLabel.text = [self getCacheSize];
return cell;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
[MBProgressHUD LY_ShowSuccess:LYLocalizedString(@"正在清除缓存") toView:self.view];
[LYFielService clearCache:@"Library/Caches"];
[tableView reloadRowsAtIndexPaths:@[[NSIndexPath indexPathForItem:1 inSection:1]] withRowAnimation:UITableViewRowAnimationFade];
}
#pragma mark - Custom Methods
- (NSString *)getCacheSize{
float size_m = [LYFielService folderSizeAtPath:@"Library/Caches"];
return [NSString stringWithFormat:@"%.2fMB",size_m];
}
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