UISearchBar在单击时修改其框架/边界

问题描述

我正在尝试在我的应用UI中放置一个UISearchController。布局是：

I'm trying to place a UISearchController within my apps UI. The layout is:

• 黄色：一个ViewController


• 红色：另一个ViewController


• 黑色：YellowViewController中的容器

我想将UISearchController的UISearchView放在黑色容器中。

I want to put the UISearchView of the UISearchController within the black container.

我的代码如下：

self.searchController = [[UISearchController alloc] initWithSearchResultsController:searchResultsViewController];
UISearchBar* searchBar = self.searchController.searchBar;
searchBar.frame =_searchBarContainer.bounds;
[_searchBarContainer addSubview:searchBar];
[_searchBarContainer layoutIfNeeded];

它将UISearchBar放在正确的位置：

It places the UISearchBar in the correct place:

但是当我选择搜索字段时，它会扩展容器边界上的条形码：

But when I select the search field it expands the bar over the container's bounds:

如何解决这个问题并避免尺寸/外观变化何时被选中？

How can I solve that and avoid the size/appearance change when selected?

注意：尝试使用 translatesAutoresizingMaskIntoConstraints 和 clipToBounds 选项没有成功。我不是iOS UI的专家，所以我希望得到一个准确的答案。谢谢

Note: Tried some options playing with the translatesAutoresizingMaskIntoConstraints and the clipToBounds options with no success. I'm not an expert of iOS UI so I would appreciate an accurate answer. Thanks

推荐答案

根据我的研究，每次选择 SearchBar ，提供 UISearchController 。这个 UISearchController 总是试图让 searchBar 的宽度等于 UIViewController 呈现 UISearchController 。

According to my research, at each time you select SearchBar, a UISearchController is presented. This UISearchController always try to make searchBar's width equals to UIViewController which is presenting UISearchController.

我的解决方案是 UISearchController 使 SearchBar 框架错误，再次设置 SearchBar '框架。您可以尝试以下代码。

My solution is when UISearchController makes SearchBar has wrong frame, set SearchBar'frame again. You can try this code below.

@interface ViewController () <UISearchControllerDelegate>

@property (nonatomic, strong) UISearchController* searchController;
@property (weak, nonatomic) IBOutlet UIView *searchBarContainer;

@end

@implementation ViewController

- (void)viewDidLoad {
  [super viewDidLoad];
  self.searchController = [[UISearchController alloc] initWithSearchResultsController:searchResultsViewController];
  UISearchBar* searchBar = self.searchController.searchBar;
  self.searchController.delegate = self;
  searchBar.frame =_searchBarContainer.bounds;
  [_searchBarContainer addSubview:searchBar];
  [_searchBarContainer layoutIfNeeded];



}

- (void)willPresentSearchController:(UISearchController *)searchController {
  [searchController.searchBar addObserver:self forKeyPath:@"frame" options:NSKeyValueObservingOptionNew | NSKeyValueObservingOptionOld context:nil];
}

- (void)willDismissSearchController:(UISearchController *)searchController{
  [searchController.searchBar removeObserver:self forKeyPath:@"frame"];
}

- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary<NSKeyValueChangeKey,id> *)change context:(void *)context {
  if (object == self.searchController.searchBar) {
    if (!CGSizeEqualToSize(self.searchController.searchBar.frame.size, _searchBarContainer.frame.size)) {
      self.searchController.searchBar.superview.clipsToBounds = NO;
      self.searchController.searchBar.frame = CGRectMake(0, 0, _searchBarContainer.frame.size.width, _searchBarContainer.frame.size.height);
    }
  }
}

@end

至少，它有效：）

或

• 你可以创建另一个 UIViewController ，其中包含 SearchBar ，然后将其添加到_searchBarContainer，如果您的案例没有任何问题。


• 使用 UISearchBar 和 UITableView 而不是 UISearchController 。它更容易处理。

• You can create another UIViewController which contains SearchBar after that add it to _searchBarContainer if your case don't have any problem with this.
• Use UISearchBar and UITableView instead of UISearchController. It's easier to handle.

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