这里实现的是进入页面后直接在导航栏上显示搜索框（包含右侧取消按钮），并弹出键盘且搜索框为直接可输入状态（第一响应者），点击右侧取消按钮后收起键盘并返回上一页。
搜索页面
1.实现代理UISearchBarDelegate
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@interface SearchViewController ()<UISearchBarDelegate> |
2.创建一个UISearchBar为属性
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@property (nonatomic, strong) UISearchBar *searchBar; |
3.进入页面后弹起键盘和离开页面前收起键盘
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- (void)viewDidAppear:(BOOL)animated{ [super viewDidAppear:animated]; if (!_searchBar.isFirstResponder) { [self.searchBar becomeFirstResponder]; }}- (void)viewWillDisappear:(BOOL)animated{ [super viewWillDisappear:animated]; [self.searchBar resignFirstResponder];} |
4.具体实现
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- (void)setBarButtonItem{ //隐藏导航栏上的返回按钮 [self.navigationItem setHidesBackButton:YES]; //用来放searchBar的View UIView *titleView = [[UIView alloc] initWithFrame:CGRectMake(5, 7, self.view.frame.size.width, 30)]; //创建searchBar UISearchBar *searchBar = [[UISearchBar alloc] initWithFrame:CGRectMake(0, 0, CGRectGetWidth(titleView.frame) - 15, 30)]; //默认提示文字 searchBar.placeholder = @"搜索内容"; //背景图片 searchBar.backgroundImage = [UIImage imageNamed:@"clearImage"]; //代理 searchBar.delegate = self; //显示右侧取消按钮 searchBar.showsCancelButton = YES; //光标颜色 searchBar.tintColor = UIColorFromRGB(0x595959); //拿到searchBar的输入框 UITextField *searchTextField = [searchBar valueForKey:@"_searchField"]; //字体大小 searchTextField.font = [UIFont systemFontOfSize:15]; //输入框背景颜色 searchTextField.backgroundColor = [UIColor colorWithRed:234/255.0 green:235/255.0 blue:237/255.0 alpha:1]; //拿到取消按钮 UIButton *cancleBtn = [searchBar valueForKey:@"cancelButton"]; //设置按钮上的文字 [cancleBtn setTitle:@"取消" forState:UIControlStateNormal]; //设置按钮上文字的颜色 [cancleBtn setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal]; [titleView addSubview:searchBar]; self.searchBar = searchBar; self.navigationItem.titleView = titleView;} |
5.实现代理方法
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#pragma mark - UISearchBarDelegate- (BOOL)searchBarShouldBeginEditing:(UISearchBar *)searchBar{ return YES;}- (void)searchBarTextDidBeginEditing:(UISearchBar *)searchBar { searchBar.showsCancelButton = YES;}- (void)searchBarSearchButtonClicked:(UISearchBar *)searchBar{ NSLog(@"SearchButton");}- (void)searchBarCancelButtonClicked:(UISearchBar *)searchBar{ [self.searchBar resignFirstResponder]; [self.navigationController popViewControllerAnimated:YES];}- (void)searchBarTextDidEndEditing:(UISearchBar *)searchBar{ searchBar.showsCancelButton = YES;}- (void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText{ NSString *inputStr = searchText; [self.results removeAllObjects]; for (ElderModel *model in self.dataArray) { if ([model.name.lowercaseString rangeOfString:inputStr.lowercaseString].location != NSNotFound) { [self.results addObject:model]; } } [self.tableView reloadData];} |
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。
原文链接：http://www.jianshu.com/p/dd6f0a0b1781
