从零开始学习iOS开发－股票记帐本1.0(3)

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6. 设置文本输入框的默认键盘

storyboard-Attributes inspector-Keyboard Type

7. 将字符串中的数字转换为float类型

float float=[string floatValue];

8. 获取系统时间

- (NSString *)sellStockDate{NSDateFormatter *dateFormatter=[[NSDateFormatter alloc]init];[dateFormatter setDateFormat:@"yyyy年MM月dd日"];return [dateFormatter stringFromDate:[NSDate date]];
}

9. 设置字体颜色以及保留小数点后的位数

cell.gainOrLose.text=[NSString stringWithFormat:@"+%.0f",ValueOfGainOrLose];cell.gainOrLose.textColor=[UIColor colorWithRed:1 green:0 blue:0 alpha:1];

10. 实现tableview的横扫删除

- (void)tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath{[self.dataModel.Data removeObjectAtIndex:indexPath.row];NSArray *indexPaths = @[indexPath];[tableView deleteRowsAtIndexPaths:indexPaths withRowAnimation:UITableViewRowAnimationAutomatic];[self.dataModel saveData];
}

11. 取消cell的选中状态

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{[tableView deselectRowAtIndexPath:indexPath animated:YES];
}

12. 添加搜索框

可以参考这个网址：http://www.tuicool.com/articles/6viqEn

1）在.h文件中

<UISearchBarDelegate,UISearchResultsUpdating>

在.m文件中
2）

@property (strong, nonatomic) UISearchController *searchController;

3)初始化

 _searchController=[[UISearchController alloc]initWithSearchResultsController:nil];
_searchController.searchResultsUpdater=self;_searchController.dimsBackgroundDuringPresentation=NO;_searchController.hidesNavigationBarDuringPresentation=NO;_searchController.searchBar.frame=CGRectMake(self.searchController.searchBar.frame.origin.x, self.searchController.searchBar.frame.origin.y, self.searchController.searchBar.frame.size.width, 40);self.tableview.tableHeaderView=self.searchController.searchBar;

4）判断搜索时的tableview

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{if (self.searchController.active) {return [self.searchData count];}else{return [self.dataModel.Data count];}
}

- (void)updateSearchResultsForSearchController:(UISearchController *)searchController{NSString *searchString = [self.searchController.searchBar text];if (self.searchData!= nil) {[self.searchData removeAllObjects];}
//    NSPredicate *predicate = [NSPredicate predicateWithFormat:@"SELF CONTAINS[c] %@", searchString];//过滤数据
//    self.searchData= [NSMutableArray arrayWithArray:[self.dataModel.Data filteredArrayUsingPredicate:predicate]];self.searchData=[[NSMutableArray alloc]initWithCapacity:20];for (NSUInteger i=0;i<[self.dataModel.Data count];i++) {stockData *stockdata=self.dataModel.Data[i];if ([stockdata.nameOfStock containsString:searchString]) {[self.searchData addObject:self.dataModel.Data[i]];}}[self.tableview reloadData];
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{......if (self.searchController.active) {stockdata=self.searchData[indexPath.row];}else{stockdata=self.dataModel.Data[indexPath.row];}......}