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我有一個爲iOS 7編寫的應用程序，我需要更新，因爲UISearchDisplayController已棄用UISearchController。從UISearchDisplayController轉換==> UISearchController無法顯示搜索欄
我已經通過了幾個教程，並嘗試過，但我無法得到這個工作，但我很接近。
我跟隨此pattern。
我遇到的問題是我下面的模式將子文件中的數據加載到NSDict對象中，但是我的數據在數組中。沒問題，我只是修改了搜索以使用謂詞（我現在硬編碼了一些東西，所有記錄都帶有E中的名字）。
但我收到以下錯誤：
2017年9月12日13：01：41.538 Scoular [7644：1963822] - [員工isEqualToString：]：無法識別的選擇發送到實例0x608000105580 2017-09-由於未捕獲的異常'NSInvalidArgumentException'，原因：' - [employee isEqualToString：]：無法識別的選擇器發送到實例0x608000105580'
在SearchResultsTableViewController中終止應用程序。 m文件，在線
cell.textLabel.text = self.searchResults[indexPath.row];
來自下面的m文件。我很難過。任何幫助將不勝感激。
#import "SearchResultsTableViewController.h"
@interface SearchResultsTableViewController()
@property (nonatomic, strong) NSArray *array;
@end
@implementation SearchResultsTableViewController
#pragma mark - Table view data source
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return [self.searchResults count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"SearchResultCell" forIndexPath:indexPath];
cell.textLabel.text = self.searchResults[indexPath.row];
return cell;
}
@end
頭文件
@import UIKit;
@class EmployeeDetailViewController;
#import <CoreData/CoreData.h>
#import "EmployeeDatabase.h"
@interface EmployeeListViewController : UITableViewController
@end
實現文件
#import "EmployeeListViewController.h"
#import "EmployeeDetailViewController.h"
#import "SearchResultsTableViewController.h"
@interface EmployeeListViewController() <UISearchResultsUpdating>
@property (nonatomic, strong) NSMutableArray *employees;
@property (nonatomic, strong) UISearchController *searchController;
@property (nonatomic, strong) NSMutableArray *searchResults;
@property (nonatomic,retain) NSMutableDictionary *sections;
@end
@implementation EmployeeListViewController
BOOL isSearching;
//Do I still need this
- (void)awakeFromNib {
if ([[UIDevice currentDevice] userInterfaceIdiom] ==
UIUserInterfaceIdiomPad) {
self.clearsSelectionOnViewWillAppear = NO;
self.preferredContentSize = CGSizeMake(320.0, 600.0);
}
[super awakeFromNib];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
}
- (void)viewDidLoad {
[super viewDidLoad];
// Get array of employees and sections
self.employees = [EmployeeDatabase getEmployees];
self.sections = [EmployeeDatabase getSections:_employees];
// There's no transition in our storyboard to our search results tableview or navigation controller
// so we'll have to grab it using the instantiateViewControllerWithIdentifier: method
UINavigationController *searchResultsController = [[self storyboard] instantiateViewControllerWithIdentifier:@"TableSearchResultsNavController"];
// Our instance of UISearchController will use searchResults
self.searchController = [[UISearchController alloc] initWithSearchResultsController:searchResultsController];
// The searchcontroller's searchResultsUpdater property will contain our tableView.
self.searchController.searchResultsUpdater = self;
// The searchBar contained in XCode's storyboard is a leftover from UISearchDisplayController.
// Don't use this. Instead, we'll create the searchBar programatically.
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.tableView.tableHeaderView = self.searchController.searchBar;
// Set the back bar button
UIBarButtonItem *backButton =
[[UIBarButtonItem alloc] initWithTitle:@"Employees"
style:UIBarButtonItemStylePlain
target:nil
action:nil];
self.navigationItem.backBarButtonItem = backButton;
}
#pragma mark - Table Sections
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
NSInteger tmpCount;
if (isSearching) {
tmpCount = 1;
} else {
tmpCount = [[self.sections allKeys] count];
}
return tmpCount;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return [self.employees count];
}
#pragma mark - Table View
- (UITableViewCell *)tableView:(UITableView *)tableView
cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = @"Cell";
UITableViewCell *cell =
[tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [self.tableView dequeueReusableCellWithIdentifier:CellIdentifier];
}
employee *thisEmployee =
[[self.sections
valueForKey:[[[self.sections allKeys]
sortedArrayUsingSelector:
@selector(localizedCaseInsensitiveCompare:)]
objectAtIndex:indexPath.section]]
objectAtIndex:indexPath.row];
cell.textLabel.text = thisEmployee.fulNme;
return cell;
}
- (NSString *)tableView:(UITableView *)tableView
titleForHeaderInSection:(NSInteger)section {
NSString *tmpString;
//if (tableView == self.searchDisplayController.searchResultsTableView) {
//tmpString = nil;
//} else {
tmpString =
[[[self.sections allKeys]
sortedArrayUsingSelector:@selector(localizedCaseInsensitiveCompare:
)] objectAtIndex:section];
//}
return tmpString;
}
#pragma mark - Right side bar alphabetical index
- (NSArray *)sectionIndexTitlesForTableView:(UITableView *)tableView {
NSArray *tmpTitle;
if (isSearching) {
tmpTitle = nil;
} else {
tmpTitle = [[self.sections allKeys]
sortedArrayUsingSelector:@selector(localizedCaseInsensitiveCompare:)];
}
return tmpTitle;
}
#pragma mark - UISearchControllerDelegate & UISearchResultsDelegate
// Called when the search bar becomes first responder
- (void)updateSearchResultsForSearchController:(UISearchController *)searchController
{
// Set searchString equal to what's typed into the searchbar
NSString *searchString = self.searchController.searchBar.text;
[self updateFilteredContentForAirlineName:searchString];
// If searchResultsController
if (self.searchController.searchResultsController) {
UINavigationController *navController = (UINavigationController *)self.searchController.searchResultsController;
// Present SearchResultsTableViewController as the topViewController
SearchResultsTableViewController *vc = (SearchResultsTableViewController *)navController.topViewController;
// Update searchResults
vc.searchResults = self.searchResults;
// And reload the tableView with the new data
[vc.tableView reloadData];
}
}
// Update self.searchResults based on searchString, which is the argument in passed to this method
- (void)updateFilteredContentForAirlineName:(NSString *)employeeName
{
if (employeeName == nil) {
// If empty the search results are the same as the original data
self.searchResults = [self.employees mutableCopy];
} else {
NSArray *searchResults2 = [[NSMutableArray alloc] init];
NSPredicate *predicate = [NSPredicate predicateWithFormat:@"fulNme contains 'E'"];
searchResults2 = [self.employees filteredArrayUsingPredicate:predicate];
self.searchResults = [searchResults2 mutableCopy];
}
}
@end