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//
// SetViewController.m
// dfhx
//
// Created by dfhx_iMac_001 on 16/4/5.
// Copyright © 2016年 luoyun. All rights reserved.
//
#import "SetViewController.h"
@interface SetViewController ()<UITableViewDelegate,UITableViewDataSource>
@property (nonatomic, strong) UITableView * tableView;
@property (nonatomic, strong) NSArray * dataSource;
@property (nonatomic, copy) NSString * cacheSize;
@property (nonatomic, strong) UIView * navView;
@end
@implementation SetViewController
- (void)viewDidLoad {
[super viewDidLoad];
// Do any additional setup after loading the view.
[self tableView];
[self navView];
}
- (UIView *)navView
{
if (!_navView) {
_navView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, Screen_Width, 64)];
_navView.backgroundColor = RGBA(51, 51, 51, 1);
[self.view addSubview:_navView];
UIButton * btn = [UIButton buttonWithType:UIButtonTypeCustom];
[_navView addSubview:btn];
[btn mas_makeConstraints:^(MASConstraintMaker *make) {
make.left.mas_equalTo(_navView).offset(10);
make.size.mas_equalTo(CGSizeMake(40, 40));
make.topMargin.offset(20);
}];
[btn addTarget:self action:@selector(btnAction) forControlEvents:UIControlEventTouchUpInside];
[btn setImage:[UIImage imageNamed:@"backItemImg.png"] forState:UIControlStateNormal];
[btn setImageEdgeInsets:UIEdgeInsetsMake(15, 5, 8, 23)];
}
return _navView;
}
- (void)btnAction
{
AppDelegate * app = (AppDelegate *)[UIApplication sharedApplication].delegate;
[app.window setRootViewController:app.leftSlide];
}
// 设置返回导航栏
- (void)setNavigation
{
UIBarButtonItem *LeftButton = [[UIBarButtonItem alloc] initWithTitle:nil style:UIBarButtonItemStylePlain target:self action:@selector(back)];
[LeftButton setImage:[UIImage imageNamed:@"backItemImg.png"]];
LeftButton.imageInsets = UIEdgeInsetsMake(20, 0, 15, 20);
LeftButton.tintColor = [UIColor whiteColor];
self.navigationItem.leftBarButtonItem = LeftButton;
}
- (void)back
{
[self.navigationController popViewControllerAnimated:YES];
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return 1;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString * reuseID = @"cell";
UITableViewCell * cell = [tableView dequeueReusableCellWithIdentifier:reuseID];
if (!cell) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleValue1 reuseIdentifier:reuseID];
}
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
cell.textLabel.text =@"清除缓存";
cell.detailTextLabel.text = self.cacheSize;
cell.selectionStyle = UITableViewCellSeparatorStyleSingleLine;
[self myClearCacheAction:NO];
return cell;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
if ([self.cacheSize isEqualToString:@"0.00MB"]) {
[self alertView:@"当前无缓存！" cancel:@""];
}
else
{
[self alertView:@"确认清除缓存？" cancel:@"取消"];
}
}
- (void)alertView:(NSString *)alertTitle cancel:(NSString *)cancelTitle
{
UIAlertController *alertController = [UIAlertController alertControllerWithTitle:alertTitle message:@"" preferredStyle:UIAlertControllerStyleAlert];
UIAlertAction *cancelAction = [UIAlertAction actionWithTitle:cancelTitle style:UIAlertActionStyleCancel handler:nil];
UIAlertAction *okAction = [UIAlertAction actionWithTitle:@"好的" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
if ([alertTitle isEqualToString:@"确认清除缓存？"]) {
//清除缓存
[self myClearCacheAction:YES];
}
}];
if ([cancelTitle isEqualToString:@""]) {
[alertController addAction:okAction];
}
else
{
[alertController addAction:cancelAction];
[alertController addAction:okAction];
}
[self presentViewController:alertController animated:YES completion:nil];
}
//清理缓存
-(void)myClearCacheAction:(BOOL)isClear
{
if (isClear == YES) {
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
NSString *cachePath = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) objectAtIndex:0];
NSArray *files = [[NSFileManager defaultManager] subpathsAtPath:cachePath];
for (NSString *p in files) {
NSError *error;
NSString *path = [cachePath stringByAppendingPathComponent:p];
if ([[NSFileManager defaultManager] fileExistsAtPath:path]) {
//清理缓存文件
[[NSFileManager defaultManager] removeItemAtPath:path error:&error];
}
}
[self performSelectorOnMainThread:@selector(clearCacheSuccess) withObject:nil waitUntilDone:YES];
});
}
else
{
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 0), ^{
NSString *cachePath = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) objectAtIndex:0];
CGFloat fileSize = [self folderSizeAtPath:cachePath];
dispatch_async(dispatch_get_main_queue(), ^{
NSString * t = [NSString stringWithFormat:@"%.2fMB",fileSize];
self.cacheSize = t;
NSIndexPath *indexPath=[NSIndexPath indexPathForRow:0 inSection:0];
[self.tableView reloadRowsAtIndexPaths:[NSArray arrayWithObjects:indexPath,nil] withRowAnimation:UITableViewRowAnimationNone];
});
});
}
}
-(void)clearCacheSuccess
{
NSLog(@"缓存已清除！");
}
//计算目录下所有文件大小
- (CGFloat)folderSizeAtPath:(NSString *)folderPath
{
NSFileManager *manager = [NSFileManager defaultManager];
if (![manager fileExistsAtPath:folderPath]) {
return 0;
}
NSEnumerator *childFilesEnumerator = [[manager subpathsAtPath:folderPath] objectEnumerator];
NSString *fileName = nil;
long long folderSize = 0;
while ((fileName = [childFilesEnumerator nextObject]) != nil) {
NSString *fileAbsolutePath = [folderPath stringByAppendingPathComponent:fileName];
folderSize += [self fileSizeAtPath:fileAbsolutePath];
}
return folderSize/(1024.0*1024.0);
}
//计算文件大小
- (long long)fileSizeAtPath:(NSString *)filePath
{
NSFileManager* manager = [NSFileManager defaultManager];
if ([manager fileExistsAtPath:filePath]){
return [[manager attributesOfItemAtPath:filePath error:nil] fileSize];
}
return 0;
}
// 懒加载tableview
- (UITableView *)tableView
{
if (!_tableView) {
_tableView = [[UITableView alloc] initWithFrame:CGRectMake(0, 64, self.view.width, self.view.height) style:UITableViewStylePlain];
_tableView.dataSource = self;
_tableView.delegate = self;
_tableView.backgroundColor = [UIColor whiteColor];
_tableView.showsHorizontalScrollIndicator = NO;
_tableView.showsVerticalScrollIndicator = NO;
_tableView.tableFooterView = [[UIView alloc] initWithFrame:CGRectZero];
_tableView.scrollEnabled = NO;
[self.view addSubview:_tableView];
}
return _tableView;
}
#pragma mark ------当页面出现和消失的时候--------
- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
self.tabBarController.tabBar.hidden = YES;
}
- (void)viewWillDisappear:(BOOL)animated
{
[super viewWillDisappear:animated];
self.navigationController.navigationBarHidden = NO;
self.tabBarController.tabBar.hidden = NO;
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
/*
#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
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原文地址：http://www.cnblogs.com/LiLihongqiang/p/5617119.html
