Position UISearchBar programmatically using UISearchController

问题

I'm attempting to position my UISearchBar directly under my UINavigationBar but I'm having issues where it's not appearing at all. I'm using iOS8's new searchController.

 self.searchController = [[UISearchController alloc] initWithSearchResultsController:searchResultsController];
 self.searchController.searchResultsUpdater = self;
 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.salesTableView.tableHeaderView = self.searchController.searchBar;

Currently I'm using that which correctly adds it to my UITableView header, but the issue with that is that it scrolls with the table which is not what I want. I want it above my tableview so it sticks instead and tried this but it seems to be gone now, unless I'm not using the right values?

 self.searchController = [[UISearchController alloc] initWithSearchResultsController:searchResultsController];
 self.searchController.searchResultsUpdater = self;
 self.searchController.searchBar.frame = CGRectMake(0, 0, self.searchController.searchBar.frame.size.width, 44.0);
 //  self.salesTableView.tableHeaderView = self.searchController.searchBar;

回答1:

Because the origin is (0,0), it will be hidden by status bar and navigation bar. You should see the search bar if changing to:

self.searchController.searchBar.frame = CGRectMake(0, 64, self.searchController.searchBar.frame.size.width, 44.0);

I have two solution. I will show you the easy way (you could also use storyboard): Create a UIView in your ViewController, named searchBarView; Add self.searchController.searchBar into the searchBarView; Add searchBarView to your ViewController.

UIView *searchBarView = CGRectMake(0, 64, self.searchController.searchBar.frame.size.width, 44);
[searchBarView addSubView:self.searchController.searchBar];
[self.view addSubView:searchBarView];

I assume that you setup search controller self.searchController.searchBar.sizeToFit() in viewDidload. If it is the universal app, you need to add this method (at least in my case to make everything work):

- (void)viewDidLayoutSubviews {
    // you could check
    // if (IS_IPAD || (IS_IPHONE_6PLUS && UIDeviceOrientationIsLandscape([UIDevice currentDevice].orientation))) 
    [self.searchController.searchBar sizeToFit];
}

This is my first answer on stackoverflow. Hope this help ^^.

回答2:

Two things to check out:

Try setting automaticallyAdjustsScrollViewInsets to false on your UIViewController. That should shift the subviews of your view controller's view to below the navigation bar.
Use searchFieldBackgroundPositionAdjustment (available iOS 5+) to adjust the position of the search field inside of your UISearchBar

Usage:

let searchBar = UISearchBar()
searchBar.searchFieldBackgroundPositionAdjustment = UIOffset(horizontal: 0, vertical: 10)

来源：https://stackoverflow.com/questions/26639791/position-uisearchbar-programmatically-using-uisearchcontroller

标签

ios

objective-c

uisearchcontroller