我有一个带有UISearchDisplayController的IUSearchBar,一切运行良好:
screenshot 1 http://joeranbosma.nl/xcode/sdc1.png
screenshot 1 http://joeranbosma.nl/xcode/sdc2.png
但是,来了!
screenshot 1 http://joeranbosma.nl/xcode/sdc3.png
当我然后点击clear(x)按钮时,程序崩溃并出现SIGABRT错误:
screenshot 1 http://joeranbosma.nl/xcode/sdc4.png
..我不知道如何解决这个问题:(
这是我的源代码:(不知道你需要解决什么问题) http://joeranbosma.nl/xcode/wearch_stack.zip
但我认为这是最有用的部分:
- (void)viewDidLoad {
[super viewDidLoad];
//Initialize the array.
listOfItems = [[NSMutableArray alloc] init];
copyListOfItems = [[NSMutableArray alloc] init];
staticlist = [[NSMutableArray alloc] init];
staticlist = listOfItems;
//Add items
[listOfItems addObject:@"Iceland"];
[listOfItems addObject:@"Greenland"];
[listOfItems addObject:@"Switzerland"];
[listOfItems addObject:@"Norway"];
[listOfItems addObject:@"New Zealand"];
[listOfItems addObject:@"Greece"];
[listOfItems addObject:@"Rome"];
[listOfItems addObject:@"Ireland"];
//Set the title
self.navigationItem.title = @"Wearch";
// Uncomment the following line to display an Edit button in the navigation bar for this view controller.
// self.navigationItem.rightBarButtonItem = self.editButtonItem;
}
// Customize the number of sections in the table view.
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
return 1;
}
// Customize the number of rows in the table view.
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
if (searching)
return [copyListOfItems count];
else {
return [listOfItems count];
}
}
// Customize the appearance of table view cells.
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
static NSString *CellIdentifier = @"Cell";
UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
if (cell == nil) {
cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
}
// Configure the cell.
if(searching)
cell.textLabel.text = [copyListOfItems objectAtIndex:indexPath.row];
else {
NSString *txtLbl = [listOfItems objectAtIndex:indexPath.row];
cell.textLabel.text = [txtLbl stringByAppendingString:@"x"];
}
cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
return cell;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
//Get the selected word
NSString *selectedWord = nil;
if(searching)
selectedWord = [copyListOfItems objectAtIndex:indexPath.row];
else {
selectedWord = [listOfItems objectAtIndex:indexPath.row];
}
//Initialize the detail view controller and display it.
DetailViewController *dvController = [[DetailViewController alloc] initWithNibName:@"DetailView" bundle:[NSBundle mainBundle]];
dvController.selectedWord = selectedWord;
[self.navigationController pushViewController:dvController animated:YES];
[dvController release];
dvController = nil;
}
- (void) searchBarTextDidBeginEditing:(UISearchBar *)theSearchBar {
searching = YES;
}
- (void)searchBar:(UISearchBar *)theSearchBar textDidChange:(NSString *)searchText {
//Remove all objects first.
[copyListOfItems removeAllObjects];
if([searchText length] > 0) {
searching = YES;
[self searchTableView];
}
else {
searching = NO;
}
[self.tableView reloadData];
}
- (void) searchBarSearchButtonClicked:(UISearchBar *)theSearchBar {
[self searchTableView];
}
- (void) searchTableView {
NSString *searchText = searchBar.text;
NSMutableArray *searchArray = [[NSMutableArray alloc] init];
NSMutableArray *results1 = [[NSMutableArray alloc] init];
NSMutableArray *results2 = [[NSMutableArray alloc] init];
[searchArray addObjectsFromArray:listOfItems];
for (NSString *sTemp in searchArray) {
NSRange titleResultsRange = [sTemp rangeOfString:searchText options:NSCaseInsensitiveSearch];
if (titleResultsRange.length > 0){
if (titleResultsRange.location == 0) {
[results1 addObject:sTemp];
}
else{
[results2 addObject:sTemp];
}
}
}
for (NSString *sTemp in results1) {
[copyListOfItems addObject:sTemp];
}
for (NSString *sTemp in results2) {
[copyListOfItems addObject:sTemp];
}
[searchArray release];
searchArray = nil;
}
我希望你们中的一个能解决这个问题。
你能说出你喜欢的图片吗?
答案 0 :(得分:4)
这是一个有趣的问题。答案很长,searchBarTextDidBeginEditing:
在tableView:numberOfRowsInSection:
之后tableView:cellForRowAtIndexPath:
之前被调用。结果是tableView
期望[listOfItems count]
行数,但是当它调用tableView:cellForRowAtIndexPath:
时,searching
BOOL为YES
,因此视图控制器使用{ {1}}填充表格,当然不包含足够数量的对象来填充表格。
简短的回答是,在您搜索之前,停止告诉您正在搜索的视图控制器;如果您使用实际文本进行搜索,请设置copyListOfItems
,而不仅仅是searching = YES;
是第一响应者。
真正简短的回答:
searchBar
似乎工作正常。
针对此类情景的一些提示:
1)查看控制台中的打印堆栈跟踪。它会让你看到问题是:
- (void) searchBarTextDidBeginEditing:(UISearchBar *)theSearchBar {
// Comment this assignment out
//searching = YES;
}
2)大量使用'NSRangeException', reason: '*** -[__NSArrayM objectAtIndex:]: index 0 beyond bounds for empty array'
;我发现最有帮助的是:
NSLog
编辑响应控制台中的非符号化堆栈跟踪(即NSLog(@"%@",NSStringFromSelector(_cmd));
):
3)使用异常断点;如图所示:
4)添加未捕获的异常处理程序; As described here