我UISearchController自从学习以来就使用它UISearchDisplayController已被弃用。但是现在有一个问题，与 GitHub 上 Chenyuan 的SPGooglePlacesAutocomplete分叉库集成。
当我开始输入时，我得到了搜索栏，没有显示任何结果。我还想知道的是，如果 UISearchDisplayController 已被弃用，Chenyuan Demo 会在没有警告或弃用方法的情况下运行。
这是我试图将他的演示转换为 UISearchController 的代码片段，请告诉我哪里出错了。
主视图控制器.h
#import <UIKit/UIKit.h>
#import <MapKit/MapKit.h>
#define IS_OS_8_OR_LATER ([[[UIDevice currentDevice] systemVersion] floatValue] >= 8.0)
@class SPGooglePlacesAutocompleteQuery;
@interface MainViewController : UIViewController <MKMapViewDelegate, CLLocationManagerDelegate,
UISearchBarDelegate,
UISearchControllerDelegate,
UITableViewDataSource,
UITableViewDelegate>{
NSArray *searchResultPlaces;
SPGooglePlacesAutocompleteQuery *searchQuery;
MKPointAnnotation *selectedPlaceAnnotation;
BOOL shouldBeginEditing;
@private
CGRect _searchTableViewRect;
}
// Search
@property (strong, nonatomic) UISearchDisplayController *searchController;
@property (strong, nonatomic) MKLocalSearch *localSearch;
@property (strong, nonatomic) MKLocalSearchResponse *results;
@end
MainViewController.m 片段
// setup Search Controller
-(void) setupSearchController {
// The TableViewController used to display the results of a search
UITableViewController *searchResultsController = [[UITableViewController alloc] initWithStyle:UITableViewStylePlain];
searchResultsController.automaticallyAdjustsScrollViewInsets = NO; // Remove table view insets
searchResultsController.tableView.dataSource = self;
searchResultsController.tableView.delegate = self;
// Initialize our UISearchController
self.searchController = [[UISearchController alloc] initWithSearchResultsController:searchResultsController];
self.searchController.delegate = self;
self.searchController.searchBar.delegate = self;
// Hint for the search
self.searchController.searchBar.placeholder = @"Search your destination address";
}
// Setup Search Bar
-(void) setupSearchBar {
// Set search bar dimension and position
CGRect searchBarFrame = self.searchController.searchBar.frame;
CGRect viewFrame = self.view.frame;
self.searchController.searchBar.frame = CGRectMake(searchBarFrame.origin.x,
searchBarFrame.origin.y,
viewFrame.size.width,
44.0);
// Add SearchController's search bar to our view and bring it to front
[self.view addSubview:self.searchController.searchBar];
[self.view bringSubviewToFront:self.searchController.searchBar];
}
MainViewController.m 的延续
-(void)willPresentSearchController:(UISearchController *)aSearchController {
aSearchController.searchBar.bounds = CGRectInset(aSearchController.searchBar.frame, 0.0f, 0.0f);
// Set the position of the result's table view below the status bar and search bar
// Use of instance variable to do it only once, otherwise it goes down at every search request
if (CGRectIsEmpty(_searchTableViewRect)) {
CGRect tableViewFrame = ((UITableViewController *)aSearchController.searchResultsController).tableView
.frame;
tableViewFrame.origin.y = tableViewFrame.origin.y + 64; //status bar (20) + nav bar (44)
tableViewFrame.size.height = tableViewFrame.size.height;
_searchTableViewRect = tableViewFrame;
}
[((UITableViewController *)aSearchController.searchResultsController).tableView setFrame:_searchTableViewRect];
}
#pragma mark -
#pragma mark UISearchDisplayDelegate
- (void)handleSearchForSearchString:(NSString *)searchString {
searchQuery.location = self.mapView.userLocation.coordinate;
searchQuery.input = searchString;
[searchQuery fetchPlaces:^(NSArray *places, NSError *error) {
if (error) {
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Could not fetch Places"
message:error.localizedDescription
delegate:nil
cancelButtonTitle:@"OK"
otherButtonTitles:nil, nil];
[alert show];
} else {
searchResultPlaces = places;
// [self.searchController.searchResultsTableView reloadData];
[[(UITableViewController *)self.searchController.searchResultsController tableView] reloadData];
}
}];
}
- (BOOL)searchController:(UISearchController *)controller shouldReloadTableForSearchString:(NSString *)searchString {
[self handleSearchForSearchString:searchString];
// Return YES to cause the search result table view to be reloaded.
return YES;
}
- (void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText {
if (![searchBar isFirstResponder]) {
// User tapped the 'clear' button.
shouldBeginEditing = NO;
[self.searchController setActive:NO];
[self.mapView removeAnnotation:selectedPlaceAnnotation];
}
}
- (BOOL)searchBarShouldBeginEditing:(UISearchBar *)searchBar {
if (shouldBeginEditing) {
// Animate in the table view.
NSTimeInterval animationDuration = 0.3;
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:animationDuration];
// self.searchController.searchResultsTableView.alpha = 0.75;
[(UITableViewController *)self.searchController.searchResultsController tableView].alpha = 0.75;
[UIView commitAnimations];
[self.searchController.searchBar setShowsCancelButton:YES animated:YES];
}
BOOL boolToReturn = shouldBeginEditing;
shouldBeginEditing = YES;
return boolToReturn;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return [searchResultPlaces count];
}
- (SPGooglePlacesAutocompletePlace *)placeAtIndexPath:(NSIndexPath *)indexPath {
return searchResultPlaces[indexPath.row];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *cellIdentifier = @"SPGooglePlacesAutocompleteCell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:cellIdentifier];
if (!cell) {
cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier];
}
cell.textLabel.font = [UIFont fontWithName:@"GillSans" size:16.0];
cell.textLabel.text = [self placeAtIndexPath:indexPath].name;
return cell;
}
#pragma mark -
#pragma mark UITableViewDelegate
- (void)recenterMapToPlacemark:(CLPlacemark *)placemark {
MKCoordinateRegion region;
MKCoordinateSpan span;
span.latitudeDelta = 0.02;
span.longitudeDelta = 0.02;
region.span = span;
region.center = placemark.location.coordinate;
[self.mapView setRegion:region];
}
- (void)addPlacemarkAnnotationToMap:(CLPlacemark *)placemark addressString:(NSString *)address {
[self.mapView removeAnnotation:selectedPlaceAnnotation];
selectedPlaceAnnotation = [[MKPointAnnotation alloc] init];
selectedPlaceAnnotation.coordinate = placemark.location.coordinate;
selectedPlaceAnnotation.title = address;
[self.mapView addAnnotation:selectedPlaceAnnotation];
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
SPGooglePlacesAutocompletePlace *place = [self placeAtIndexPath:indexPath];
[place resolveToPlacemark:^(CLPlacemark *placemark, NSString *addressString, NSError *error) {
if (error) {
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Could not map selected Place"
message:error.localizedDescription
delegate:nil
cancelButtonTitle:@"OK"
otherButtonTitles:nil, nil];
[alert show];
} else if (placemark) {
[self addPlacemarkAnnotationToMap:placemark addressString:addressString];
[self recenterMapToPlacemark:placemark];
[self requestForwardGeoCoding:[self placeAtIndexPath:indexPath].name];
// ref: https://github.com/chenyuan/SPGooglePlacesAutocomplete/issues/10
[self.searchController setActive:NO];
// [self.searchController.searchResultsTableView deselectRowAtIndexPath:indexPath animated:NO];
}
}];
}
@end
