每次我点击搜索栏时，ios 应用程序都会崩溃，同时从 parse.com 检索数据

Question

每次我尝试单击搜索栏时，应用程序都会崩溃，下面是与 parse.com SDK 一起使用的 UItableview 的代码，我在代码中是否遗漏了什么。在加载键盘之前单击搜索栏时它会崩溃。

#

NSRangeException'，原因：'-[NSArrayM objectAtIndex:]: index 0 beyond bounds for empty array' ** 第一次抛出调用堆栈：( 0 CoreFoundation 0x0000000102cb1795 __exceptionPreprocess + 165 1 libobjc.A.dylib 0x0000000102a14991 objc_exception_throw + 43 2 CoreFoundation

#

这是加载搜索栏的视图加载方法

@interface CarTableViewController () <UISearchDisplayDelegate, UISearchBarDelegate>
{
GADBannerView *bannerView_;
}
@ property (nonatomic, strong) UISearchBar * searchbar;
@ property (nonatomic, strong) UISearchDisplayController *searchcontroller;
@ property (nonatomic, strong) NSMutableArray * SearchResults;
@end

@implementation CarTableViewController

- (id)initWithStyle:(UITableViewStyle)style
{
self = [super initWithStyle:style];
if (self) {
    // Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
//search bar

self.searchbar = [[UISearchBar alloc] initWithFrame: CGRectMake (0, 0, self.view.frame.size.width, 44)];
self.tableView.tableHeaderView = self.searchbar;
self.searchcontroller = [[UISearchDisplayController alloc] initWithSearchBar: self.searchbar contentsController: self];
self.searchcontroller.searchResultsDataSource = self;
self.searchcontroller.searchResultsDelegate = self;
self.searchcontroller.delegate = self;
CGPoint offset = CGPointMake(0, self.searchbar.frame.size.height);
self.tableView.contentOffset = offset;
self.searchResults = [NSMutableArray array];
}




- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}

#pragma mark - Table view data source

这是解析的负载

- (id)initWithCoder:(NSCoder *)aCoder
{
self = [super initWithCoder:aCoder];
if (self) {
    self.parseClassName = @"movienow";
    self.textKey = @"mName";
    self.pullToRefreshEnabled = YES;
    self.paginationEnabled = NO;
}
return self;
}

//where to search and other

- (void) filterResults: (NSString *)searchTerm{

[self.SearchResults removeAllObjects];

PFQuery * query = [PFQuery queryWithClassName: self.parseClassName]; // table in which you are looking for
[query whereKeyExists: @ "mName"]; // column which you are looking for
[query whereKey: @ "mName" containsString : searchTerm];

NSArray * results = [query findObjects];
[self.SearchResults addObjectsFromArray: results];
}

- (BOOL) searchDisplayController:(UISearchDisplayController *) controller shouldReloadTableForSearchString: (NSString *) searchstring {
[self filterResults: searchstring];
return YES;
}


- (NSInteger) Tableview: (UITableView *) Tableview numberOfRowsInSection: (NSInteger) section {
if (Tableview == self.tableView) {
    return self.objects.count;
} else {
    return self.SearchResults.count;
}
}

- (void) callbackLoadObjectsFromParse: (NSArray *)result error:(NSError *) error {
if (!error) {
    [self.SearchResults removeAllObjects],
    [self.SearchResults addObjectsFromArray: result];
    [self.searchDisplayController.searchResultsTableView reloadData];
} else {
    NSLog (@ "Error:%@ %@", error, [error userInfo]);
}
}



- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath object:(PFObject *)object
{
static NSString *CellIdentifier = @"CarTableCell";
CarTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
    cell = [[CarTableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier];
}

if (tableView == self.tableView) {

//cell.mName.text = [object objectForKey:@"objectld"];
    NSLog(@"%@",[object objectForKey:@"mName"]);

}
else if (tableView == self.searchDisplayController.searchResultsTableView){
    PFObject *searchUser = [self.SearchResults objectAtIndex:indexPath.row];
    NSLog(@"%@",[searchUser objectForKey:@"mName"]);
        }

// Configure the cell...

return cell;
}

崩溃日志

2014-01-23 15:58:23.440 MovieTimeLK2[8442:70b] * 由于未捕获的异常“NSRangeException”而终止应用程序，原因：“ -[NSArrayM objectAtIndex:]: 索引 0 超出空数组的范围' ** 首先抛出调用堆栈： ( 0 核心基础 0x0000000102cb1795 __exceptionPreprocess + 165 1 libobjc.A.dylib 0x0000000102a14991 objc_exception_throw + 43 2 核心基础 0x0000000102c578e5 -[__NSArrayM objectAtIndex:] + 213 3 MovieTimeLK2 0x0000000100005aab -[CarTableViewController tableView:cellForRowAtIndexPath:object:] + 2155 4 MovieTimeLK2 0x0000000100078c7d -[PFQueryTableViewController tableView:cellForRowAtIndexPath:] + 200 5 UIKit 0x0000000101742b8a-[UITableView _createPreparedCellForGlobalRow:withIndexPath:] + 348 6 UIKit 0x000000010172a836-[UITableView _updateVisibleCellsNow:] + 2297 7 UIKit 0x000000010173b381-[UITableView 布局子视图] + 207 8 UIKit 0x00000001016d2b27-[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 354 9 QuartzCore 0x00000001010c7a22 -[CALayer layoutSublayers] + 151 10 石英核心 0x00000001010bc589 _ZN2CA5Layer16layout_if_neededEPNS_11TransactionE + 363 11 UIKit 0x00000001016c7470-[UIView（层次结构）layoutBelowIfNeeded] + 521 12 UIKit 0x00000001019a46c3-[UISearchDisplayControllerContainerView setFrame:] + 113 13 UIKit 0x000000010199de5f-[UISearchDisplayController setActive:animated:] + 9697 14 UIKit 0x00000001019a0576-[UISearchDisplayController searchBarTextDidBeginEditing:] + 277 15 UIKit 0x00000001018e31b0 -[UISearchBar(UISearchBarStatic)_searchFieldBeginEditing] + 97 16 UIKit 0x00000001016780ae-[UIApplication sendAction:to:from:forEvent:] + 104 17 UIKit 0x0000000101678044-[UIApplication sendAction:toTarget:fromSender:forEvent:] + 17 18 UIKit 0x000000010174c450-[UIControl_sendActionsForEvents:withEvent:] + 203 19 UIKit 0x0000000101c83594-[UITextField willAttachFieldEditor:] + 576 20 UIKit 0x00000001017513d7 -[UIFieldEditor 成为FieldEditorForView:] + 725 21 UIKit 0x0000000101c7b2df-[UITextField_becomeFirstResponder] + 143 22 UIKit 0x00000001018e5eb3 -[UISearchBarTextField _becomeFirstResponder] + 92 23 UIKit 0x000000010179fc0c -[UIResponder 成为FirstResponder] + 340 24 UIKit 0x00000001016c6abc -[UIView(Hierarchy) 成为FirstResponder] + 99 25 UIKit 0x0000000101c7ae53 -[UITextField 成为FirstResponder] + 51 26 UIKit 0x000000010198820c-[UITextInteractionAssistant(UITextInteractionAssistant_Internal) setFirstResponderIfNecessary] + 118 27 UIKit 0x0000000101989fc0-[UITextInteractionAssistant(UITextInteractionAssistant_Internal) oneFingerTap:] + 1768 28 UIKit 0x000000010198050a _UIGestureRecognizerSendActions + 188 29 UIKit 0x000000010197f470 -[UIGestureRecognizer updateGestureWithEvent:buttonEvent:] + 357 30 UIKit 0x0000000101983829 __UIGestureRecognizerUpdate_block_invoke + 53 31 UIKit 0x00000001019837b1 _UIGestureRecognizerRemoveObjectsFromArrayAndApplyBlocks + 257 32 UIKit 0x000000010197b87d _UIGestureRecognizerUpdate + 93 33 UIKit 0x00000001016ac925-[UIWindow_sendGesturesForEvent:] + 928 34 UIKit 0x00000001016ad5e5 -[UIWindow 发送事件：] + 910 35 UIKit 0x0000000101686fa2-[UIApplication 发送事件：] + 211 36 UIKit 0x0000000101674d7f _UIApplicationHandleEventQueue + 9549 37 核心基础 0x0000000102c40ec1 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION + 17 38 核心基础 0x0000000102c40792 __CFRunLoopDoSources0 + 242 39 核心基础 0x0000000102c5c61f __CFRunLoopRun + 767 40 核心基础 0x0000000102c5bf33 CFRunLoopRunSpecific + 467 41 图形服务 0x00000001049873a0 GSEventRunModal + 161 42 UIKit 0x0000000101677043 UIApplicationMain + 1010 43 电影时间LK2 0x0000000100006c33 主要 + 115 44 libdyld.dylib 0x00000001035e65fd 开始 + 1 45 ？？？ 0x0000000000000001 0x0 + 1 ) libc++abi.dylib：以 NSException 类型的未捕获异常终止 (lldb)

Answer 1

从贴出的崩溃日志看来，你的问题出在PFObject *searchUser = [self.SearchResults objectAtIndex:indexPath.row];

但是如果你已经在 - (NSInteger) Tableview: (UITableView *) Tableview numberOfRowsInSection: (NSInteger) section 中使用了 return self.SearchResults.count; 那就很奇怪了

首先想到的是你在- (void) filterResults: (NSString *)searchTerm中调用[self.SearchResults removeAllObjects];的地方，我建议使用下面的代码：

- (void) filterResults: (NSString *)searchTerm{

     PFQuery * query = [PFQuery queryWithClassName: self.parseClassName]; // table in which you are looking for
     [query whereKeyExists: @ "mName"]; // column which you are looking for
     [query whereKey: @ "mName" containsString : searchTerm];

     NSArray * results = [query findObjects];
     self.SearchResults = [results mutableCopy];

}

更新：

由于它在第一次输入时崩溃，请确保 numberOfRowsInSection 返回 self.SearchResults.count 而不是 self.objects.count，如果返回但未返回零，请尝试在您的 @987654332 中将 self.searchResults = [NSMutableArray array]; 替换为 self.searchResults = [[NSMutableArray alloc] init]; @

希望它能解决你的问题。

Answer 2

我认为你没有初始化可变数组更改

self.searchResults = [NSMutableArray array];

到

self.searchResults = [NSMutableArray alloc]init];