enter image description here这里我已经实现了使用搜索栏所需的所有内容，但不知道应用程序出了什么问题。当我开始在搜索栏中输入任何内容时，它会崩溃。任何帮助表示赞赏。
错误：
'Can't use in/contains operator with collection <NSManagedObject: 0x7fa1c24d32a0> (entity: Personal; id: 0xd0000000000c0000 <x-coredata://2C964E4A-A8CD-465B-BB23-0121B7C7EEFB/Personal/p3> ; data: {
attribute = Ios;
name = man;
}) (not a collection)'
*** First throw call stack:
(
0 CoreFoundation 0x0000000104ed5e65 __exceptionPreprocess + 165
1 libobjc.A.dylib 0x00000001045c2deb objc_exception_throw + 48
2 Foundation 0x00000001041db6b1 -[NSCompoundPredicate evaluateWithObject:substitutionVariables:] + 0
3 Foundation 0x00000001041b2719 -[NSPredicateOperator performOperationUsingObject:andObject:] + 286
4 Foundation 0x00000001041b1e3c -[NSComparisonPredicate evaluateWithObject:substitutionVariables:] + 313
5 Foundation 0x00000001041b1c94 _filterObjectsUsingPredicate + 398
6 Foundation 0x00000001041b1a84 -[NSArray(NSPredicateSupport) filteredArrayUsingPredicate:] + 279
7 Personal Data 0x00000001040ba6a2 -[ViewDetailViewController updateSearchResultsForSearchController:] + 514
8 UIKit 0x0000000105cb2185 -[UISearchController _searchBar:textDidChange:] + 102
9 UIKit 0x0000000105675d47 -[UISearchBar(UISearchBarStatic) _searchFieldEditingChanged] + 360
10 UIKit 0x0000000105285194 -[UIApplication sendAction:to:from:forEvent:] + 92
11 UIKit 0x00000001053f46fc -[UIControl sendAction:to:forEvent:] + 67
12 UIKit 0x00000001053f49c8 -[UIControl _sendActionsForEvents:withEvent:] + 311
13 UIKit 0x0000000105c68a85 -[UITextField fieldEditorDidChange:] + 206
14 UIKit 0x0000000105c73cb7 -[UITextInputController _sendDelegateChangeNotificationsForText:selection:] + 138
15 UIKit 0x0000000105c76281 -[UITextInputController _insertText:fromKeyboard:] + 893
16 UIKit 0x0000000105c76bcd -[UITextInputController insertText:] + 365
17 UIKit 0x0000000105400728 -[UIFieldEditor insertFilteredText:] + 800
18 UIKit 0x0000000105c6d7d7 -[UITextField insertFilteredText:] + 103
19 UIKit 0x000000010552ba83 -[UIKeyboardImpl insertText:] + 125
20 UIKit 0x0000000105528278 -[UIKeyboardImpl performKeyboardOutput:] + 496
21 UIKit 0x0000000105527e65 __55-[UIKeyboardImpl handleKeyboardInput:executionContext:]_block_invoke_2 + 164
22 UIKit 0x0000000105c96724 -[UIKeyboardTaskQueue continueExecutionOnMainThread] + 332
23 Foundation 0x00000001041aa067 __NSThreadPerformPerform + 283
24 CoreFoundation 0x0000000104e01a31 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
25 CoreFoundation 0x0000000104df795c __CFRunLoopDoSources0 + 556
26 CoreFoundation 0x0000000104df6e13 __CFRunLoopRun + 867
27 CoreFoundation 0x0000000104df6828 CFRunLoopRunSpecific + 488
28 GraphicsServices 0x00000001086f0ad2 GSEventRunModal + 161
29 UIKit 0x0000000105283610 UIApplicationMain + 171
30 Personal Data 0x00000001040bbd9f main + 111
31 libdyld.dylib 0x000000010762992d start + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException
#import "ViewDetailViewController.h"
#import <CoreData/CoreData.h>
@interface ViewDetailViewController () <UITableViewDelegate,UITableViewDataSource>
{
NSMutableArray *_park;
}
@property (nonatomic, strong) NSMutableArray *searchResult;
@end
@implementation ViewDetailViewController
- (NSManagedObjectContext *)managedObjectContext
{
NSManagedObjectContext *context = nil;
id delegate = [[UIApplication sharedApplication] delegate];
if ([delegate performSelector:@selector(managedObjectContext)]) {
context = [delegate managedObjectContext];
}
return context;
}
- (void)viewDidAppear:(BOOL)animated
{
[super viewDidAppear:animated];
// Fetch the devices from persistent data store
NSManagedObjectContext *managedObjectContext = [self managedObjectContext];
NSFetchRequest *fetchRequest = [[NSFetchRequest alloc] initWithEntityName:@"Personal"];
self.devices = [[managedObjectContext executeFetchRequest:fetchRequest error:nil] mutableCopy];
搜索栏声明
[self.tableView reloadData];
// self.searchResult = [NSMutableArray arrayWithCapacity: [self.devices count]];
searchResultsArray = [[NSArray alloc]init];
self.searchController = [[UISearchController alloc]initWithSearchResultsController:nil];
self.searchController.searchBar.delegate = self;
self.searchController.searchResultsUpdater = self;
[self.searchController.searchBar sizeToFit];
self.searchController.dimsBackgroundDuringPresentation = NO;
self.definesPresentationContext = YES;
self.tableView.tableHeaderView = self.searchController.searchBar;
// Do any additional setup after loading the view.
}
-(void)updateSearchResultsForSearchController:(UISearchController *)searchController{
NSString *searchString = self.searchController.searchBar.text;
if (searchString.length > 0)
{
NSPredicate *resultPredicate;
NSInteger scope = self.searchController.searchBar.selectedScopeButtonIndex;
if(scope == 0){
resultPredicate = [NSPredicate predicateWithFormat:@"SELF contains[c] %@",searchString];
}else{
resultPredicate = [NSPredicate predicateWithFormat:@"SELF contains[c] %@",searchString];
}
NSArray * filterArray = [self.devices filteredArrayUsingPredicate:resultPredicate];
_park = [[NSMutableArray alloc] init];
[_park addObject:filterArray];
}
else{
//_park = (NSMutableArray *)shortedArray;
}
[self.tableView reloadData];
}
- (void)searchBar:(UISearchBar *)searchBar selectedScopeButtonIndexDidChange:(NSInteger)selectedScope{
[self updateSearchResultsForSearchController:self.searchController];
}
TableView委托方法
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return [self.devices count];
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
static NSString *CellIdentifier = @"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];
// Configure the cell...
NSManagedObject *device = [self.devices objectAtIndex:indexPath.row];
// cell.textLabel.text = [self.searchResult objectAtIndex:indexPath.row];
[cell.textLabel setText:[NSString stringWithFormat:@"%@", [device valueForKey:@"name"]]];
[cell.detailTextLabel setText:[device valueForKey:@"attribute"]];
return cell;
}
}
答案 0 :(得分：1)
试试这个，在SELF中使用属性名称。我假设对象是Personal类型的属性名称和其他。
NSPredicate *resultPredicate;
NSInteger scope = self.searchController.searchBar.selectedScopeButtonIndex;
if(scope == 0){
resultPredicate = [NSPredicate predicateWithFormat:@"(SELF.name contains[cd] %@) OR (SELF.other CONTAINS[cd] %@)",searchString, searchString];
}else{
resultPredicate = [NSPredicate predicateWithFormat:@"SELF.name contains[cd] %@",searchString];
}
NSArray * filterArray = [self.devices filteredArrayUsingPredicate:resultPredicate];
_park = [[NSMutableArray alloc] init];
[_park addObject:filterArray];