如何修复iOS 11搜索栏跳转到选择(Swift)屏幕顶部?

时间:2017-09-25 03:46:01

标签: iphone swift ios11 xcode9

具体来说,对于iOS 11(而不是之前的操作系统),当您点击搜索栏开始输入时,它会跳转到屏幕顶部。

我可以使用以下代码在搜索栏已经靠近屏幕顶部时解决此问题:

if #available(iOS 11, *) {
     navigationItem.searchController = searchController

     navigationItem.hidesSearchBarWhenScrolling = false
} else {
     BugsTable.tableHeaderView = searchController.searchBar
}

但是,当我在视图中间有一个搜索栏(即其上方有一些其他元素)时,该代码无法正常工作,因为它告诉导航控制器内的搜索栏。我看到了以下问题,但对Swift没有可行的答案:

iOS 11 search bar jumping to top of screen

iOS 11 Searchcontroller jumps top of screen

我的ViewDidLoad设置参数是:

searchController.searchResultsUpdater = self
searchController.hidesNavigationBarDuringPresentation = false
searchController.dimsBackgroundDuringPresentation = false
searchController.searchBar.sizeToFit()
ResultsTable.tableHeaderView = searchController.searchBar
searchController.searchBar.barTintColor = MyGlobalVariable.themeMainColor

我在这里缺少什么?

1 个答案:

答案 0 :(得分:-1)

试试这个:

   if (@available(iOS 11, *)){

            [searchVC.searchBar addObserver:self forKeyPath:@"frame" options: NSKeyValueObservingOptionNew context:nil];

        }else{

            [view addSubview:searchVC.searchBar];
        }

- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary *)change context:(void *)context
{

        CGRect rect = [change[@"new"] CGRectValue];
        if (rect.origin.y == 14) {
            CGRect temp = rect;
            temp.origin.y = 20;
            [self.searchVC.searchBar setValue:@(temp) forKey:@"frame"];
        }else if (rect.size.height == 56){

            CGRect temp = rect;
            temp.size.height = 50;
            [self.searchVC.searchBar setValue:@(temp) forKey:@"frame"];
        }
    }