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- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.

    [self initSearchBar];
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

#pragma mark: 设置顶部导航搜索部分
- (void)initSearchBar
{
    self.navigationItem.titleView = self.searchBar;
    if (@available(iOS 11.0, *))
    {
        [self.searchBar.heightAnchor constraintLessThanOrEqualToConstant:kEVNScreenNavigationBarHeight].active = YES;
    }
    else
    {

    }


}

#pragma mark: getter method EVNCustomSearchBar
- (EVNCustomSearchBar *)searchBar
{
    if (!_searchBar)
    {
        _searchBar = [[EVNCustomSearchBar alloc] initWithFrame:CGRectMake(0, kEVNScreenStatusBarHeight, kEVNScreenWidth, kEVNScreenNavigationBarHeight)];

        _searchBar.backgroundColor = [UIColor clearColor]; // 清空searchBar的背景色
        _searchBar.iconImage = [UIImage imageNamed:@"EVNCustomSearchBar.bundle/searchImageBlack.png"];
//        _searchBar.iconImage = [UIImage imageNamed:@"EVNCustomSearchBar.bundle/searchImageTextColor.png"];
        _searchBar.iconAlign = EVNCustomSearchBarIconAlignCenter;
        [_searchBar setPlaceholder:@"请输入关键字"];  // 搜索框的占位符
        _searchBar.placeholderColor = TextGrayColor;
        _searchBar.delegate = self; // 设置代理
        [_searchBar sizeToFit];
    }
    return _searchBar;
}

#pragma mark: EVNCustomSearchBar delegate method
- (BOOL)searchBarShouldBeginEditing:(EVNCustomSearchBar *)searchBar
{
    NSLog(@"class: %@ function:%s", NSStringFromClass([self class]), __func__);
    return YES;
}

- (void)searchBarTextDidBeginEditing:(EVNCustomSearchBar *)searchBar
{
    NSLog(@"class: %@ function:%s", NSStringFromClass([self class]), __func__);
}

- (BOOL)searchBarShouldEndEditing:(EVNCustomSearchBar *)searchBar
{
    NSLog(@"class: %@ function:%s", NSStringFromClass([self class]), __func__);
    return YES;
}

- (void)searchBarTextDidEndEditing:(EVNCustomSearchBar *)searchBar
{
    NSLog(@"class: %@ function:%s", NSStringFromClass([self class]), __func__);
}

- (void)searchBar:(EVNCustomSearchBar *)searchBar textDidChange:(NSString *)searchText
{
    NSLog(@"class: %@ function:%s", NSStringFromClass([self class]), __func__);
}

- (BOOL)searchBar:(EVNCustomSearchBar *)searchBar shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text
{
    NSLog(@"class: %@ function:%s", NSStringFromClass([self class]), __func__);
    return YES;
}

- (void)searchBarSearchButtonClicked:(EVNCustomSearchBar *)searchBar
{
    NSLog(@"class: %@ function:%s", NSStringFromClass([self class]), __func__);
}

- (void)searchBarCancelButtonClicked:(EVNCustomSearchBar *)searchBar
{
    NSLog(@"class: %@ function:%s", NSStringFromClass([self class]), __func__);
}

- (void)touchesEnded:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{
    [self.searchBar resignFirstResponder];
}