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我已经搜索了互联网，并没有得到任何结果。我的 ios 应用程序只是一个带有 indexpath 的简单导航控制器，它应该将自定义动态单元格 () 选择的行的标题发送到 uilabel。问题是数据源来自mysql，它是在nsarray（称为coolarray）中解析的xml。该错误发生在移动到下一个视图之前，并且在日志中为：由于未捕获的异常“NSInvalidArgumentException”而终止应用程序，原因：“[__NSDictionaryI isEqualToString:]：无法识别的选择器已发送到实例 0x8887670”。但是，它确实给出了 indexPathrow:0 或 1 或任何选择的 nslog 结果。一定是数组传递到uilabel有问题，但我想不通！我已经省略了自定义单元格的代码，因为这不太可能是错误的原因并且工作正常（加号很简单）。这是我之前在UITableView 拒绝进入 detailViewController的问题的后续，但该代码不再相关，因为如下所示，我的代码发生了很大变化。

视图控制器.h

#import <UIKit/UIKit.h>
#import <CoreLocation/CoreLocation.h>
#import "Player.h"


@interface ViewController : UIViewController<UITableViewDelegate, UITableViewDataSource,
 CLLocationManagerDelegate,NSXMLParserDelegate, UISearchBarDelegate> {
    IBOutlet UISearchBar *searchBar;

    CLLocationManager *locationManager;

    NSMutableArray *coolarray;

    float latitude;
    float longitude;
}
@property(nonatomic,strong) IBOutlet UITableView * tableView; 
@property (nonatomic, retain) CLLocationManager *locationManager;

@end

视图控制器.m

#import "ViewController.h"
#import "LoadingViewController.h"


@interface ViewController ()

@end

@implementation ViewController


- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}
- (void)dealloc
{
    [super dealloc];
    [self.locationManager release];
    if ( coolarray )
        [coolarray release];
}

- (void)viewDidLoad
{
    [super viewDidLoad];

    coolarray = NULL;

    self.locationManager = [[[CLLocationManager alloc] init] autorelease];
    self.locationManager.delegate = self;
    [self.locationManager startUpdatingLocation];
    [[self navigationController] setNavigationBarHidden:YES];
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    return YES;
}

// Table data delegate
- (NSInteger)tableView:(UITableView *)table numberOfRowsInSection:(NSInteger)section {
    if ( coolarray != NULL ) {
        return [coolarray count];
    }
    return 0;
}

- (UITableViewCell *)tableView:(UITableView *)tv cellForRowAtIndexPath:(NSIndexPath *)indexPath {
        Player *cell = [_tableView dequeueReusableCellWithIdentifier:@"Player"];

    if (cell == nil)
    {
        cell = [[[Player alloc] initWithFrame:CGRectZero reuseIdentifier:@"Player"] autorelease];
    }
     NSDictionary *itemAtIndex =(NSDictionary *)[coolarray objectAtIndex:indexPath.row];
    cell.nameLabel.text = [itemAtIndex objectForKey:@"name"];
    return cell;
}




// XML request and parsing
- (void)updateLocation:(CLLocation *)newLocation {
    if ( coolarray ) {
        [coolarray release];
    }
    coolarray = [[NSMutableArray alloc] init];

    if ( newLocation ) {
        latitude = newLocation.coordinate.latitude;
        longitude = newLocation.coordinate.longitude;
    }

    NSString *urlString = [NSString stringWithFormat:@"(censored)"];

    NSXMLParser *locationParser = [[[NSXMLParser alloc] initWithContentsOfURL:[NSURL URLWithString:urlString]] autorelease];
    [locationParser setDelegate:self];
    [locationParser parse];


    [_tableView reloadData];
}

- (void)parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict {

    if ( [elementName isEqualToString:@"location"]) {
        [coolarray addObject:[[NSDictionary alloc] initWithDictionary:attributeDict]];
    }
}

// GPS handling
- (void)locationManager:(CLLocationManager *)manager
    didUpdateToLocation:(CLLocation *)newLocation
           fromLocation:(CLLocation *)oldLocation
{
    [self updateLocation:newLocation];
}

- (void)locationManager:(CLLocationManager *)manager
       didFailWithError:(NSError *)error
{
}

// Search bar handling
- (void)searchBarSearchButtonClicked:(UISearchBar *)sb {
    [self updateLocation:NULL];
    [searchBar resignFirstResponder];
}

- (void)searchBarCancelButtonClicked:(UISearchBar *)sb
{
    [searchBar resignFirstResponder];
}

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
 {


}

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
    if([segue.identifier  isEqualToString:@"showDetail"])
{
    NSIndexPath * indexPath=[self->_tableView indexPathForSelectedRow];
    LoadingViewController* destViewController= segue.destinationViewController;
    destViewController.myProgLang=[coolarray objectAtIndex:indexPath.row];
    NSLog(@"indexPathrow:%d",indexPath.row);
}
}

@end

LoadingViewController.h（我的详细视图）

#import <UIKit/UIKit.h>

@interface LoadingViewController : UIViewController
 {


}

@property (nonatomic, retain) IBOutlet UILabel *myLabel;
@property (nonatomic, retain) NSString *myProgLang;

@end

LoadingViewController.m（我的详细视图）

#import "LoadingViewController.h"

@interface LoadingViewController ()

@end

@implementation LoadingViewController
@synthesize myLabel, myProgLang;
- (void)viewDidLoad {
    [super viewDidLoad];
    myLabel.text = myProgLang;
    [[self navigationController] setNavigationBarHidden:YES];
}

- (void)dealloc {
    [myLabel release];
    [myProgLang release];
    [super dealloc];
}
@end
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1 回答 1

0

问题是您的数组似乎是字典对象的集合。当您要进行 segue 时，您正在从对象中取出字典并尝试将其存储为 NSString 属性。

尝试更改您的 prepareForSegue: 方法，如下所示：

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender {
    if([segue.identifier  isEqualToString:@"showDetail"])
    {
        NSIndexPath * indexPath=[self->_tableView indexPathForSelectedRow];
        LoadingViewController* destViewController= segue.destinationViewController;
        destViewController.myProgLang=[[coolarray objectAtIndex:indexPath.row] objectForKey:@"name"];
        NSLog(@"indexPathrow:%d",indexPath.row);
    }

}
于 2012-11-03T20:04:29.043 回答