分割字符串：NSArray *tempArr = [fileName componentsSeparatedByString:@"."];

 

//颜色    UIColor  *backgroundColor=[UIColor redColor];    //字体    UIFont *font=[UIFont boldSystemFontOfSize:18.0];    NSDictionary *attrsDic=@{                             NSForegroundColorAttributeName:backgroundColor,                             NSFontAttributeName:font                             };    self.mySearchBar.attributedPlaceholder = [[NSAttributedString alloc]initWithString:@"请输入展品编号" attributes:attrsDic];

 

#pragma mark - 更新主页面操作    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT,0),^{        //耗时的操作       dispatch_async(dispatch_get_main_queue(),^{            //更新界面        });    });    #pragma mark - 顺序执行//    dispatch_queue_t aqueue = dispatch_queue_create("sdfs",DISPATCH_QUEUE_CONCURRENT);//    dispatch_barrier_async(aqueue, ^{NSLog(@"1111");});//    dispatch_barrier_async(aqueue, ^{NSLog(@"2222");});//    dispatch_barrier_async(aqueue, ^{NSLog(@"3333");});        #pragma mrak - 随机执行//    dispatch_queue_t aqueue = dispatch_queue_create("sdfs",DISPATCH_QUEUE_CONCURRENT);//    dispatch_async(aqueue, ^{//        NSLog(@"111");//    });//    dispatch_async(aqueue, ^{//        NSLog(@"222");//    });//    dispatch_async(aqueue, ^{//        NSLog(@"666");//    });//    dispatch_async(aqueue, ^{//        NSLog(@"999");//    });        #pragma mark - 队列执行//    dispatch_queue_t aqueue = dispatch_queue_create("sdfs",DISPATCH_QUEUE_CONCURRENT);//    dispatch_group_t group = dispatch_group_create();//    dispatch_group_async(group,aqueue, ^{//        NSLog(@"1111");//        [NSThread sleepForTimeInterval:1.0];//    });//    dispatch_group_async(group,aqueue, ^{//        NSLog(@"2222");//        [NSThread sleepForTimeInterval:2.0];//    });//    dispatch_group_async(group,aqueue, ^{//        NSLog(@"3333");//        [NSThread sleepForTimeInterval:3.0];//    });//    //    dispatch_group_notify(group, aqueue, ^{//        NSLog(@"finish");//    });

 

@property(strong,nonatomic)UIRefreshControl *refresh;[self.refresh beginRefreshing];//viewWillAppear    [self refreshAction:nil];self.refresh = [[UIRefreshControl alloc]init];//viewDidLoad    [self.refresh addTarget:self action:@selector(refreshAction:) forControlEvents:UIControlEventValueChanged];    self.refresh.attributedTitle = [[NSAttributedString alloc]initWithString:@"下拉刷新"];    [self.myTableView addSubview:self.refresh];#pragma mark - refreshMethods-(void)refreshAction:(NSString*)str{    [self.refresh performSelector:@selector(endRefreshing) withObject:nil afterDelay:2.0];    [self.myTableView reloadData];}

 

NSString *resourcePath = [NSString stringWithFormat:@"%@/Resource",[declare applicationLibraryDirectory]];    if (![[NSFileManager defaultManager]fileExistsAtPath:resourcePath]) {        [[NSFileManager defaultManager] createDirectoryAtPath:resourcePath withIntermediateDirectories:NO attributes:nil error:nil];    }

 

@property (nonatomic, strong) NSArray *dataArray;

#pragma mark - tableView delegate#define Row_Height 100- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{    return Row_Height;}- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{    return self.dataArray.count;}- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{    static NSString *cellName = @"cell";    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellName];        if (!cell) {        cell = [[UITableViewCell alloc]init];        //        cell.selectionStyle = UITableViewCellSelectionStyleNone;    }        return cell;}- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{    }

 

//筛选信息    NSArray *arr = [[NSArray alloc]initWithObjects:@"beijing",@"shanghai",@"tianjin",@"shenzhen", nil];    NSString *string = @"in";    NSPredicate *pred = [NSPredicate predicateWithFormat:@"SELF CONTAINS %@",string];    NSLog(@"%@",[arr filteredArrayUsingPredicate:pred]);//提取字符串中的字母或数字    NSString *originalString = @"daxf1bw2cq3d45f6ge7h8i9j0";        // Intermediate    NSMutableString *numberString = [[NSMutableString alloc] init];    NSString *tempStr;    NSScanner *scanner = [NSScanner scannerWithString:originalString];    NSCharacterSet *numbers = [NSCharacterSet characterSetWithCharactersInString:@"qwe"];        while (![scanner isAtEnd]) {        // Throw away characters before the first number.        [scanner scanUpToCharactersFromSet:numbers intoString:NULL];                // Collect numbers.        BOOL isSccess = [scanner scanCharactersFromSet:numbers intoString:&tempStr];;        [numberString appendString:tempStr];        tempStr = @"";                NSLog(@"tempStr:%@   numberString:%@   bool:%d",tempStr,numberString,isSccess);    }//导航条按钮UIButton *rightBtn = [UIButton buttonWithType:UIButtonTypeCustom];    rightBtn.backgroundColor = [UIColor clearColor];    rightBtn.frame = CGRectMake(0, 0, 40, 40);    [rightBtn setImage:[UIImage imageNamed:@"button5"] forState:UIControlStateNormal];    [rightBtn setImage:[UIImage imageNamed:@"button5_pressed"] forState:UIControlStateHighlighted];    [rightBtn addTarget:self action:@selector(rightBtnClick:) forControlEvents:UIControlEventTouchUpInside];    UIBarButtonItem *barBtn = [[UIBarButtonItem alloc]initWithCustomView:rightBtn];    self.navigationItem.rightBarButtonItem = barBtn;        UIBarButtonItem *nItem = [[UIBarButtonItem alloc] initWithTitle:@"" style:UIBarButtonItemStylePlain target:self action:nil];    self.navigationItem.leftBarButtonItem = nItem;//宏定义 变量字符串化#define WARN_IF(EXP) \do { if (EXP) \        fprintf( stderr,"Warning " #EXP "\n" ); \} while(0)    int x = 0;    WARN_IF(x == 0);//cookiesNSHTTPCookieStorage *pool = [NSHTTPCookieStorage sharedHTTPCookieStorage];NSArray *cookies = [pool cookies];for (NSHTTPCookie *cookie in cookies ) {    [pool deleteCookie:cookie];}isFinite( number ) 函数用于检查其参数是否是无穷大。如果 number 是有限数字（或可转换为有限数字），那么返回 true。否则，如果 number 是 NaN（非数字），或者是正、负无穷大的数，则返回 false学习了FMDB三方库的使用，对sqlite进行操作时 表名、参数名不用带单引号 值必须带单引号 如：@"UPDATE %@ SET %@ = '%@' WHERE %@ = '%@'", TABLENAME,  AGE, @"15", AGE, @"12”//修改数据

 

segue跳转：

[self performSegueWithIdentifier:@"goToRootView" sender:nil];

 

添加tableViewcell编辑操作。//-(UITableViewCellEditingStyle)tableView:(UITableView *)tableView editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath//{   //    return UITableViewCellEditingStyleDelete;//}////- (void)tableView:(UITableView*)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath*)indexPath {//    if (editingStyle == UITableViewCellEditingStyleDelete) {//        //        //[self.da removeObjectAtIndex:indexPath.row];//        [self.myTableView deleteRowsAtIndexPaths:@[indexPath]//                                withRowAnimation:UITableViewRowAnimationAutomatic];//        [self.myTableView reloadData];//    }//}////-(BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath//{//    return YES;//}

 

//    [self.myTableView beginUpdates];

//    NSArray *indexPaths = @[indexPath];

//    [self.myTableView deleteRowsAtIndexPaths:indexPaths withRowAnimation:UITableViewRowAnimationLeft];

//    [self.myTableView endUpdates];