UIScrollview frozen when search bar in use - ios

I have a Controller with a search bar at top, and when the user types, autocompleted search results are shown below it, in a UIScrollView.
Problem:
The results show up, but the user can't scroll those results. The scrollview is frozen. The only way to scroll is to push 'Cancel' in the Search bar. Tapping "Search" hides the keyboard, but even then the scrollview is frozen.
Desired:
As the user is typing, search results are being autocompleted. At any given time, the user can scroll through those results. They should not have to hit Cancel in order to scroll.
There are more results than will fit on the screen so this isn't an issue of content being only slightly larger than the screen.
Nothing special in CancelButtonClicked or SearchButtonClicked:
- (void)searchBarCancelButtonClicked:(UISearchBar *)searchBar {
searchBar.text = #"";
}
- (void)searchBarSearchButtonClicked:(UISearchBar *)searchBar{
[searchBar resignFirstResponder];
[NSThread detachNewThreadSelector:#selector(fetchSearchResult:) toTarget:self withObject:searchBar.text];
}
- (void)searchBar:(UISearchBar *)searchBar
textDidChange:(NSString *)searchText {
if([searchBar.text length] >=3){
[mySpinner startAnimating];
[NSThread detachNewThreadSelector:#selector(fetchSearchResult:) toTarget:self withObject:searchBar.text];
}
}
- (void)searchBarTextDidBeginEditing:(UISearchBar *)searchBar {
self.searchDisplayController.searchResultsTableView.hidden = YES;
// This occurs when user starts entering text
// We want to keep the background area dark
}

I had possibly the same issue: UISearchBar was nested into UIScrollView, so when search results was shown- It was impossible to scroll parent view.
..I was puzzled but I learned (UISearchDisplayCtrl private api) that UISearchDisplayController locks all parent scroll views (bitch).
So U should add category UISearchDisplayController+Custom:
#implementation UISearchDisplayController (Custom)
- (void)_disableParentScrollViews {
}
- (void)_enableParentScrollViews {
}
#end

Related

UISearchController searchResultsController disappears when searchbar text is empty

I have a UISearchController that displays it's searchResultsController (which is another view controller) when the searchbar is tapped. I do this using this UISearchController delegate method:
-(void)presentSearchController:(UISearchController *)searchController {
dispatch_async(dispatch_get_main_queue(), ^{
searchController.searchResultsController.view.hidden = NO;
});
}
However, any time the searchbar's text is empty, whether by manually deleting all text or tapping the little x button, that searchResultsController view is disappearing until I start typing text again. Any ideas why this may be happening? Is there another method or delegate method that is being triggered when searchbar.text is empty?
So after fiddling around with this for a while yesterday, this is the solution I found that ended up working. Figured I'd post it in case anyone else has the same problem!
-(void)presentSearchController:(UISearchController *)searchController {
//forces searchResultsController to appear when searchBar tapped
dispatch_async(dispatch_get_main_queue(), ^{
searchController.searchResultsController.view.hidden = NO;
});
}
-(void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText {
//Prevents searchController from disappearing
if ([searchText isEqualToString:#""])
{
[self presentSearchController:self.searchController];
}
}

Perform action on UISearchBar when Keyboard is down and the x has been tapped

I have a UITableView with a UISearchBar on top and have a specific requirement that isn't working.
I have no Cancel button on my UISearchBar (showsCancelButton = NO) so I rely completely on the x within the UISearchBar to cancel the existing search. I rely on the Keyboard's "Search" button to dismiss the keyboard (though it's called Done in my case).
When a user searches in my app, I'm disabling a navigation bar button item because it gives a bad user experience, and only when the search has cancelled does the user get the navigation bar button item back. That's all working.
I have one particular scenario though that I cannot get around.
1) Tap on the Search Bar to enter Text
2) Click DONE on the Keyboard and the Keyboard will disappear
3) With the keyboard resigned, the x remains in the UISearchBar
4) Tap the x in the UISearchBar and the text in the SearchBar disappears and the view refreshes
5) At this point, the navigation bar button should be enabled again, but it's not.
Code:
- (void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText
{
self.timelineSearchBar.showsCancelButton = NO;
if ([searchText length] == 0)
{
[self.timelineSearchBar performSelector:#selector(resignFirstResponder)
withObject:nil
afterDelay:0];
}
I know that the code above is meant to dismiss the keyboard when the x is pressed which is fine.
In my case, the keyboard is already resigned, so I want the tapping of the x to just re-enable the navigation bar item.
self.addButton.enabled = YES;
in that if statement above doesn't do anything at all and the navigation bar item is still disabled.
I've even tried in that if statement :
[self.timelineSearchBar performSelector:#selector(enableAdd)
withObject:nil
afterDelay:0];
- (void)enableAdd
{
self.addButton.enabled = YES;
}
but that crashes saying searchBar does not respond to that enableAdd selector.
I've done a breakpoint and see that the if statement above does evaluate to true when I tap the x and it goes into the statement, it "runs" the code to enable the button, but it never happens.
Also my end editing method is:
- (void)searchBarTextDidEndEditing:(UISearchBar *)searchBar
{
[searchBar setShowsCancelButton:NO animated:YES];
self.addButton.enabled = YES;
}
UPDATE: I've tried the link here http://engineeringtheworld.wordpress.com/2011/04/11/detecting-when-clear-is-clicked-in-uisearchbar-x-button/ with no success - the textField's shouldClear method doesn't get called. I'm using iOS 7 so perhaps there's another way to embed the views with textFields? This is very possibly the right approach, but it's not working with my code because the for statement in that sample never gets evaluated as true (I put in an NSLog).
UPDATE 2: From if the if statement above, I called the searchBarCancelButton method and I had extreme loops being caused, so that of course wasn't the right approach:
[self performSelector:#selector(searchBarCancelButtonClicked:) withObject:self.timelineSearchBar afterDelay: 0];
Any guidance on this would be really appreciated. I know I'm missing a key step but I just can't quite figure it out.
The problem is that when tapping the X button, searchBar:textDidChange: is called before searchBarShouldBeginEditing:
i.e. here is the call flow: searchBar:textDidChange: -> searchBarShouldBeginEditing: -> searchBarTextDidBeginEditing: -> searchBarTextDidEndEditing:
textDidChange is setting enabled to YES, but then shouldBeginEditing is disabling it again. This works perfectly for me:
-(void)searchBarTextDidBeginEditing:(UISearchBar *)searchBar
{
self.addButton.enabled = NO;
}
-(void)searchBarTextDidEndEditing:(UISearchBar *)searchBar
{
if(searchBar.text.length == 0){
self.addButton.enabled = YES;
}
}
-(void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText
{
if ([searchText length] == 0)
{
[searchBar performSelector:#selector(resignFirstResponder) withObject:nil afterDelay:0];
}
}
-(void)searchBarSearchButtonClicked:(UISearchBar *)searchBar
{
self.addButton.enabled = [searchBar.text length] == 0;
[searchBar resignFirstResponder];
}
-(void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText
{
if([searchText length] == 0 && searchBar.text.length == 0)
{
self.addButton.enabled = YES;
[searchBar performSelector: #selector(resignFirstResponder)
withObject: nil
afterDelay: 0.1];
}
}
I'm creating an answer here for clarity, but the answer by Michaels helped massively and is the accepted approach here, although I got my code working.
I did a lot of digging around with NSLogs and interestingly, I discovered that the shouldBeginEditing appeared before the textDidChange (in the order of the NSLogs).
However, I also noticed that in the steps in my original question, with the keyboard dismissed and the UISearchBar containing text and the x visible, if I tapped x, the keyboard didn't appear, but it called shoudlBeginEditing again.
This was the method that was causing the addButton to continue to be greyed out because that method set that button to be disabled.
So I adjusted the code:
- (BOOL)searchBarShouldBeginEditing:(UISearchBar *)bar
{
NSLog(#"Should begin");
if ([self.timelineSearchBar.text length] > 0)
{
self.addButton.enabled = NO;
}
else
{
self.addButton.enabled = YES;
}
self.timelineSearchBar.showsCancelButton = NO;
BOOL boolToReturn = self.shouldBeginEditing;
self.shouldBeginEditing = YES;
return boolToReturn;
}
I put the if condition in there so that the code reacted appropriately if I went back to the searchBar after cancelling with the x.
This way, the add button does not disable as soon as I click on the UISearchBar (which brings up the keyboard). However, in the textDidChange (which is what I saw gets called from the very first letter being typed), I put the following condition too:
- (void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText
{
NSLog(#"Text did change");
self.timelineSearchBar.showsCancelButton = NO;
if ([self.timelineSearchBar.text length] > 0)
{
self.addButton.enabled = NO;
}
...
}
This way, the UISearchBar would only display the add button when I start typing in a letter. This worked for me because if the user tapped on the UISearchBar and did not type anything in, in the prepareForSegue that went to the view that the Add Entry was calling, I checked if the searchBar isFirstResponder and if so, I resignFirstResponder.
With this in mind, I'm not sure if this is the Apple way of doing things, but it's clean. I'll know soon enough if my app gets rejected because of this, but thanks so much for your help Michaels; you really pointed me in the right direction for an issue that took up my entire afternoon!

UISearchBar displaying a label when a search produces no results, but not hiding the label again when the x in the UISearchBar is clicked

I have a small situation that I can't seem to overcome.
I have a UITableView which has a UISearchBar embedded at the top. The TableView is populated by NSFetchedResultsController and CoreData.
The very first time the app is launched, with no data present, if the user tries to search, I've enabled the use of a label that comes up saying "no results found" in the middle of the screen. However, if the user clicks the x in the UISearchBar, it clears the search but doesn't again hide the label.
I don't have a cancel button for the UISearchBar (it's just the x) and I implement the use of hiding a navigation bar button when a search is active.
With this in mind, I've narrowed down the issue to the textDidChange method, but I can't seem to hide the label when the user presses x with and without the keyboard up.
I was hoping someone could potentially shed some light onto this!
- (void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText
{
self.eventSearchBar.showsCancelButton = NO;
if ([self.eventSearchBar.text length] > 0)
{
self.addButton.enabled = NO;
}
// This code seems to have no effect at all
if ([searchText length] == 0)
{
self.noResultsLabel.hidden = YES;
}
_fetchedResultsController = nil;
NSError *error;
if (![[self fetchedResultsController] performFetch:&error])
{
}
else
{
[self.eventTableView reloadData];
[self.noResultsLabel setHidden:_fetchedResultsController.fetchedObjects.count > 0];
if (![self.eventSearchBar isFirstResponder])
{
self.shouldBeginEditing = NO;
[self.eventTableView reloadData];
[self.eventSearchBar resignFirstResponder];
}
}
}
Update: Two images
Any guidance would really be appreciated!
I've managed to get this working as I desire.
I figured out that the following code in my textDidChange acts when the keyboard is still up and the user presses the x button:
if (![self.eventSearchBar isFirstResponder])
{
self.shouldBeginEditing = NO;
[self.eventTableView reloadData];
[self.eventSearchBar resignFirstResponder];
}
So within here, I put the self.noResultsLabel.hidden = YES;
With wanting to also hide the noResultsLabel if the keyboard is the first responder and the user presses the x, I did the following:
if ([self.eventSearchBar isFirstResponder] && ([self.eventSearchBar.text length] == 0))
{
self.noResultsLabel.hidden = YES;
self.addButton.enabled = YES;
[self.eventTableView reloadData];
}
Now, the user can press the x button in the UISearchBar and it will hide the noResultsLabel if it's showing if the keyboard is or is not the firstResponder.
Thanks for your help everyone.
You just check the condition whether the search text length is 0 or not and if length is 0 then hide that label.
/** called when text changes (including clear) */
(void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText1
{
if ([searchText1 length] == 0) {
//Hide The label
}
}

UISearch Bar Not Being Updated By Keyboard Input

I have a ViewController with a subview that contains a UISearchBar. When I click on the search bar the keyboard appears and I am able to close it using the cancel button. The problem seems to be that it isn't accepting any of the input when a user clicks on the keyboard buttons.
#pragma mark -
#pragma mark SEARCH METHODS
#pragma mark -
- (BOOL)searchBarShouldBeginEditing:(UISearchBar *)searchBar {
self.mainSearchBar.showsCancelButton = YES;
return YES;
}
- (void)searchBarCancelButtonClicked:(UISearchBar *)searchBar
{
[self.mainSearchBar resignFirstResponder];
self.mainSearchBar.showsCancelButton = NO;
self.mainSearchBar.text = #"";
}
- (void)searchBarSearchButtonClicked:(UISearchBar *)searchBar {
[self.mainSearchBar resignFirstResponder];
}
Has anyone had this issue before or know how to fix it?
** UPDATE *****
It turns out the Siri will work when trying to edit the UISearchBar. Still no luck with the keyboard input though. I think it has something to do with the fact that the UISearchBar is situated on a UIView that is then added as a subview. Not sure how to fix it though.
** UPDATE 2 *****
Moved the search box to the main UIView and I am still getting the same error. I am wondering if it is now related to the Navigation Controller.
Make sure that the app delegate has a [self.window makeKeyAndVisible]. Hopefully it will solve your problem.
Check whether you have added a UISearchBarDelegate in your viewController's .h file.
Try this code also:
- (void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText
{
NSLog(#"%#",searchText);
}
This has to be related to how the SearchBar is rendered in relation to the ViewController's view. Why are you making the SearchBar a subview of another view rather than a subview of the ViewController's view?
Problem solved, the answer was found on a previous thread Keyboard and cursor show, but I can't type inside UITextFields and UITextViews
It turns out that in IOS6 the Visible at Launch check needs to be clicked on the options.

What is the correct usage of the UISearchBarDelegate showsSearchResultsButton attribute?

I configure my search bar to show the results button, but the button only shows until the user enters a character. At that point, the "X" cancel button replaces it. So without entering characters, the search result set equals the entire data set. I'd like the results button to stay there so when the user has typed enough characters to get a smaller result set (like 5 or 6 rows), they can click the results button, my delegate will get called, and I can show just that result set.
UISearchBar * theSearchBar = [[UISearchBar alloc]
initWithFrame:CGRectMake(0,0,700,40)];
theSearchBar.delegate = self;
theSearchBar.placeholder = #"What are you looking for?";
theSearchBar.showsCancelButton = NO; // shows up after first char typed.
theSearchBar.showsSearchResultsButton = YES; // disappears just when I need it.
...further down in the VC... this method can only called when the search bar's input field is empty.
- (void)searchBarResultsListButtonClicked:(UISearchBar *)searchBar {
NSLog(#" searchBarResultsListButtonClicked for %#",searchBar); //
}
Advice, tutorials, sample code and justified dope-slaps welcome.
TIA
-Mike
#Rayfleck, I think you should not worry about Search Results Button at all.
If what you need is to monitor user's input until they have entered enough characters for filtering:
- (void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText {
if ([searchText length]>5) {
[self filterDataWithKeyword:searchText];
[self.tableView reloadData];
} else {
[self resetFilter];
[self.tableView reloadData];
}
}
Here is a partial answer that you can stick in viewDidLoad. It should hide the clear button, but it doesn't keep the results button visible. I'm not sure how the results button view logic is controlled behind the scenes.
for (id subview in mySearchBar.subviews) {
if ([[subview class] isSubclassOfClass:[UITextField class]]) {
[subview setClearButtonMode:UITextFieldViewModeNever];
break;
}
}
Since this approach uses all public APIs your app shouldn't get rejected. Although this approach might be prone to breaking further down the road if/when Apple decides to change the hierarchy of UISearchBar. All I'm doing is looking for the UITextField or subclass and setting its clearButtonMode.
Hope this helps.

Resources