文件缓存的实现
#import "LZJSettingViewController.h"
#import <SDImageCache.h>
#import "LZJFileTool.h"
#import <SVProgressHUD/SVProgressHUD.h>
#define CachePath [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) firstObject]
@interface LZJSettingViewController ()
@property (nonatomic, assign) NSInteger totalSize;
@end
@implementation LZJSettingViewController
static NSString * const ID = @"cell";
- (void)viewDidLoad {
[super viewDidLoad];
// 设置导航条左边按钮
self.title = @"设置";
// 设置右边
self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"jump" style:0 target:self action:@selector(jump)];
[self.tableView registerClass:[UITableViewCell class] forCellReuseIdentifier:ID];
[SVProgressHUD showWithStatus:@"正在计算缓存尺寸...."];
// 获取文件夹尺寸
// 文件夹非常小,如果我的文件非常大
[LZJFileTool getFileSize:CachePath completion:^(NSInteger totalSize) {
_totalSize = totalSize;
[self.tableView reloadData];
[SVProgressHUD dismiss];
}];
}
- (void)jump
{
UIViewController *vc = [[UIViewController alloc] init];
vc.view.backgroundColor = [UIColor redColor];
[self.navigationController pushViewController:vc animated:YES];
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return 1;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:ID];
// 计算缓存数据,计算整个应用程序缓存数据 => 沙盒(Cache) => 获取cache文件夹尺寸
// 获取缓存尺寸字符串
cell.textLabel.text = [self sizeStr];
return cell;
}
// 点击cell就会调用
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
// 清空缓存
// 删除文件夹里面所有文件
[LZJFileTool removeDirectoryPath:CachePath];
_totalSize = 0;
[self.tableView reloadData];
}
// 获取缓存尺寸字符串
- (NSString *)sizeStr
{
NSInteger totalSize = _totalSize;
NSString *sizeStr = @"清除缓存";
// MB KB B
if (totalSize > 1000 * 1000) {
// MB
CGFloat sizeF = totalSize / 1000.0 / 1000.0;
sizeStr = [NSString stringWithFormat:@"%@(%.1fMB)",sizeStr,sizeF];
} else if (totalSize > 1000) {
// KB
CGFloat sizeF = totalSize / 1000.0;
sizeStr = [NSString stringWithFormat:@"%@(%.1fKB)",sizeStr,sizeF];
} else if (totalSize > 0) {
// B
sizeStr = [NSString stringWithFormat:@"%@(%.ldB)",sizeStr,totalSize];
}
return sizeStr;
}
@end
