UISearchBar无法识别的选择器发送到实例

Question

我在本地存储了一个.json文件，在加载文件路径之后，我将countries加载到一个名为countries = (NSArray *)[NSJSONSerialization JSONObjectWithData [fileContents dataUsingEncoding:NSUTF8StringEncoding] options:0 error:NULL];的数组中。.json我将countries加载到 NSString * filePath =[[NSBundle mainBundle] pathForResource:@"countries" ofType:@"json"]; NSError * error; NSString* fileContents =[NSString stringWithContentsOfFile:filePath encoding:NSUTF8StringEncoding error:&error]; if(error||!filePath) { NSLog(@"Error reading file: %@",error.localizedDescription); } countries = (NSArray *)[NSJSONSerialization JSONObjectWithData:[fileContents dataUsingEncoding:NSUTF8StringEncoding] options:0 error:NULL]; 数组中作为：

NSMutableArray

在那之后，我采用了displayItems displayItems = [[NSMutableArray alloc] initWithArray:countries];并将其初始化为UITableView。

与displayItems代理方法相比，我count使用了NSLog 248后cellForRowAtIndexPath代表didSelectRowAtIndexPath意味着＆＃{1}} 39;正确获取值ViewController和-(void)searchBar:(UISearchBar *)searchBar textDidChange:(NSString *)searchText{ if ([searchText length] == 0) { [displayItems removeAllObjects]; [displayItems addObjectsFromArray:countries]; } else { [displayItems removeAllObjects]; for (NSString *string in countries) { NSRange r = [string rangeOfString:searchText options:NSCaseInsensitiveSearch]; if (r.location != NSNotFound) { [displayItems addObject:string]; } } } [tableView reloadData]; }

请参阅下面的图片，了解Range r 的层次结构
问题： 根据断点，这种方法正在产生问题。

unrecognized selector sent to instance

当它到达行UISearchBar时，应用程序崩溃，错误为*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSCFDictionary rangeOfString:options:]: unrecognized selector sent to instance 0x12ddd5e90' *** First throw call stack: (0x180a55900 0x1800c3f80 0x180a5c61c 0x180a595b8 0x18095d68c 0x1000d0e3c 0x185953d28 0x18577fe50 0x18577fdcc 0x185767a88 0x185953ad4 0x18578a8f8 0x18591fee8 0x18591f104 0x185aafae4 0x186095b20 0x18591ee70 0x185b5cc90 0x185b5c854 0x185772e84 0x181417e20 0x180a0cefc 0x180a0c990 0x180a0a690 0x180939680 0x181e48088 0x1857b0d90 0x1000e0e94 0x1804da8b8) libc++abi.dylib: terminating with uncaught exception of type NSException 。
一切都工作得很好，直到我在mciSendString("play mp3 wait", NULL, 0, NULL); 应用程序崩溃时输入一封信。

确切错误是：

mciSendString("pause mp3", NULL, 0, NULL);

mciSendString("stop mp3", NULL, 0, NULL);