UISearchController 很坑

最近一个项目用到了很多搜索 踩了一大波坑 还要继续踩下去

直接上代码了

<UISearchControllerDelegate,UISearchResultsUpdating>

//声明
@property (nonatomic,retain) UISearchController *searchController;


- (void)createUI{
    
    self.searchController = [[UISearchController alloc]initWithSearchResultsController:nil];
    self.searchController.delegate= self;
    self.searchController.searchResultsUpdater = self;
    self.searchController.searchBar.barTintColor = BHBackColor;
    self.searchController.searchBar.placeholder= @"车牌号";
    self.searchController.searchBar.searchBarStyle =UISearchBarStyleMinimal;
    
    //    //提前在搜索框内加入搜索词
    //    self.searchController.searchBar.text = @"xxxx";
    
    
    self.searchController.searchBar.tintColor = BHNoticeColor;
    //搜索时，背景变暗色
    self.searchController.dimsBackgroundDuringPresentation = NO;
    //搜索时，背景变模糊
    //    self.searchController.obscuresBackgroundDuringPresentation = NO;
    
    //点击搜索的时候,是否隐藏导航栏
    //    self.searchController.hidesNavigationBarDuringPresentation = NO;
    
   self.searchController.searchBar.frame = CGRectMake(self.searchController.searchBar.frame.origin.x, self.searchController.searchBar.frame.origin.y, self.searchController.searchBar.frame.size.width, 44.0);
    
    self.definesPresentationContext = YES;
    self.searchController.hidesNavigationBarDuringPresentation = NO;
    [self.searchController.searchBar setContentMode:UIViewContentModeLeft];
    
    self.navigationItem.titleView =self.searchController.searchBar;
    UIBarButtonItem *rightBarItem = [[UIBarButtonItem alloc] initWithTitle:@"" style:UIBarButtonItemStylePlain target:nil action:nil];
    self.navigationItem.rightBarButtonItem = rightBarItem;
     [self.view addSubview:self.searchTableView];
   

}








//谓词搜索过滤
-(void)updateSearchResultsForSearchController:(UISearchController *)searchController {

    NSLog(@"搜索");
    
    NSString *searchString = [self.searchController.searchBar text];

//下面处理数据  怎么处理的都可以   这个方法是 searchbar 内容改变一次就调用一次



    
    
}

 想要在跳转页面的时候键盘直接弹出来

- (void)viewDidAppear:(BOOL)animated {
    
    [super viewDidAppear:animated];
    
    [self performSelector:@selector(showKeyboard) withObject:nil afterDelay:0];
    
}
- (void)showKeyboard {
    
    [self.searchController.searchBar becomeFirstResponder];
    
}

如果

self.searchController.hidesNavigationBarDuringPresentation = YES; //默认是YES

不要在

- (void)updateSearchResultsForSearchController:(UISearchController *)searchController{

  //不要加  self.edgesForExtendedLayout = UIRectEdgeNone;  

}

否则会在返回的时候上移 44个像素

连接涉及到的坑

iOS双击Home键进入switcher任务管理切屏退出进入闪屏的解决办法

测试结果 第一种和第二种不可用 如果有加搜索的话取消按钮也会变成透明的 第三种 [[UIBarButtonItem appearance] setBackButtonTitlePositionAdjustment:UIOffsetMake(1000, 1000) forBarMetrics:UIBarMetricsDefault]; 

其他待更新......

//搜索框

- (void)viewDidAppear:(BOOL)animated
{
    [super viewDidAppear:animated];
    if (!_searchBar.isFirstResponder) {
        [self.searchBar becomeFirstResponder];
    }
}

- (void)viewWillDisappear:(BOOL)animated
{
    [super viewWillDisappear:animated];
    // 回收键盘
    [self.searchBar resignFirstResponder];
   
}

　　

- (void)setBarButtonItem
{
    [self.navigationItem setHidesBackButton:YES];
    // 创建搜索框
    UIView *titleView = [[UIView alloc] initWithFrame:CGRectMake(5, 7, self.view.frame.size.width, 30)];
    
    
    UIImage *img = [UIImage imageNamed:@"arrow_back_gray"];
    UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];
    btn.frame = CGRectMake(-10, 10, 22, 22);
    [btn setImage:img forState:UIControlStateNormal];
    [btn addTarget:self action:@selector(presentVCFirstBackClick:) forControlEvents:UIControlEventTouchUpInside];
    UIBarButtonItem *bbiBack = [[UIBarButtonItem alloc] initWithCustomView:btn];
    
    self.navigationItem.leftBarButtonItem = bbiBack;
    
    UISearchBar *searchBar = [[UISearchBar alloc] initWithFrame:CGRectMake(0, 0, CGRectGetWidth(titleView.frame) - 40, 30)];
    searchBar.placeholder = @"车牌号";
    searchBar.backgroundImage = [UIImage imageNamed:@"clearImage"];
    searchBar.delegate = self;
    searchBar.showsCancelButton = YES;
    searchBar.autocorrectionType = UITextAutocorrectionTypeNo;
    UIView *searchTextField = searchTextField = [searchBar valueForKey:@"_searchField"];
    searchTextField.backgroundColor = [UIColor colorWithRed:234/255.0 green:235/255.0 blue:237/255.0 alpha:1];
   
    [searchBar setImage:[UIImage imageNamed:@"sort_magnifier"] forSearchBarIcon:UISearchBarIconSearch state:UIControlStateNormal];
    UIButton *cancleBtn = [searchBar valueForKey:@"cancelButton"];
    //修改标题和标题颜色
    [cancleBtn setTitle:@"取消" forState:UIControlStateNormal];
    [cancleBtn setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
    
    [titleView addSubview:searchBar];
    self.searchBar = searchBar;
    [self.searchBar becomeFirstResponder];
    self.navigationItem.titleView = titleView;
    
    self.navigationItem.backBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"" style:UIBarButtonItemStylePlain target:self action:nil];
}

- (void)presentVCFirstBackClick:(UIButton *)sender
{
    [_searchBar resignFirstResponder];
    [self.navigationController popToRootViewControllerAnimated:YES];
}



- (void)searchBarCancelButtonClicked:(UISearchBar *)searchBar
{
    [self.searchBar resignFirstResponder];
   
}

- (void)searchBarTextDidEndEditing:(UISearchBar *)searchBar
{
    searchBar.showsCancelButton = YES;
}

- (void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText
{
    
}