Question

我想错了一些简单的东西，但是现在已经好几天没有解决这个问题了。甚至开始创建一个“解决方案”只是为了解决它现在，但仍然想要解决这个“正确”的方式。有什么建议？感谢的！

问题：

似乎缺少类Adealer（获取错误“ - [Adealer objectAtIndex：]：无法识别的选择器发送到实例0x8c5f8b0”），但我将导入的Adealer.h导入此“detailsVC”。 但这不仅仅是将属性命名错误的简单错误（objectForKey:@"CustName"而不是“custname”等 - 经过多次测试）。

另外，我有类似的“listVC”没有像Adealer这样的类，它们也以相同的方式将数据传输到相同的“detailsVC”，它们工作得很好！然后我只是通过调用获取数据;

self.labelRestName.text = [restDetails objectForKey:@"CustName"];

概述：

我有一个tableViewController“listVC”创建数据并显示一个列表，然后是一个ViewController“detailsVC”来显示详细信息。数据（“listVC”中的选定行对象通过seque和“destVC.restGPSTransfer”（NSDictionary）传输。数据在“detailsVC”中到达，在终端中看起来像这样;

dealerName = Uppsala Centrum Test
dealerAdressStreet = Dragarbrunnsgatan 55
dealerAdressZip = 75320
dealerAdressCity = Uppsala
dealerLongitude = 17.63893
dealerLatitude = 59.85856
dealerDistance2 = 8586398.000000
etc

关注数据：

“listVC”

1）首先通过AFNetworking json对象从Web获取数据到NSMutableArray“restFeed” - 确定。

2）然后在此循环中创建我自己的数据到NSMutableArray到NSMutableArray“updatedDealers” - ok;

    NSMutableArray *updatedDealers = [[NSMutableArray alloc]init];
        while (i+1 < [_restFeed count]) {
          i++;

    // Get dealer position function here        
    // Get distance function here

    // Then create my own data here (also #imported Adealer to "listVC";
            Adealer *theDealer = [[Adealer alloc]init];

    theDealer.dealerName = [[_restFeed objectAtIndex:i]objectForKey:@"CustName"];
    theDealer.dealerLongitude = [[_restFeed objectAtIndex:i]objectForKey:@"long"];
    theDealer.dealerLatitude = [[_restFeed objectAtIndex:i]objectForKey:@"lat"];
    theDealer.dealerDistance2 = theDistance;
    // etc...

    // Check if data ok
    NSLog(@"theDealer = %@",[theDealer description]);

    // Don't add dealer object without positiondata to the new array
    if (![theDealer.dealerLatitude isEqualToString:@""]) {          
        [updatedDealers addObject:theDealer];
    }

3）然后我使用NSSortdescriptor将NSMutableArray“updatedDealers”中的经销商按距离顺序排序，最后用此创建新的NSMutableArray“restFeed”; （也在“listVC”中做了“@synthesize dealerFeed = _dealerFeed;”） - 确定。

    _dealerFeed = [NSMutableArray arrayWithArray:sortedContestArray];

4）用这个数组填充一些tableViewCells并且它工作正常 - 好吧。

    cell.cellDealerName.text = [NSString stringWithFormat:@"%@",[[_dealerFeed objectAtIndex:indexPath.row]dealerName]];

5）在函数didSelectRowAtIndexPath中使用“detailsVC”的NSDictionary“restGPSTransfer”传输所选对象 - ok;

    destVC.restGPSTransfer = [_dealerFeed objectAtIndex:myIndexPath.row];

“detailsVC”：

6）数据似乎转移好了（这篇文章的顶部），但是当试图用数据调用时;

    self.labelRestName.text = [restGPSTransfer objectForKey:@"dealerName"];

我收到此错误并且应用程序崩溃：“ - [Adealer objectAtIndex：]：无法识别的选择器发送到实例0x8c5f8b0”。

进行了更多测试......

试图验证NSDictionary“restGPSTransfer”的结构+它的键和属性，但是到目前为止使用描述只能得到我。并没有解决我的问题，我仍然得到“无法识别的选择器”错误。它可能已成为词典中的词典或其他东西吗？

构建这个简单的if-test，看看该属性是否真的存在。但我必须“手动”检查每个属性。有一个更聪明的方法来检查洞NSDictionary / NSArray？

if ([restGPSTransfer objectForKey:@"dealerName"]) {
    NSLog(@"= YES! key exists.");
} else {
    NSLog(@"= Nope! key don't exists");
}

感谢任何帮助： - ）

更新Adealer类文件;

Adealer.h

#import <Foundation/Foundation.h>

@interface Adealer : NSObject
@property (nonatomic, retain) NSString * dealerName;        
@property (nonatomic, retain) NSString * dealerAdressCity;
@property (nonatomic, retain) NSString * dealerAdressStreet;
@property (nonatomic, retain) NSString * dealerAdressZip;   
@property (nonatomic, retain) NSNumber * dealerID;
@property (nonatomic, retain) NSString * dealerImages;      
@property (nonatomic, retain) NSString * dealerLogo;        
@property (nonatomic, retain) NSString * dealerMail;        
@property (nonatomic, retain) NSString * dealerProducts;    
@property (nonatomic, retain) NSString * dealerTel;         
@property (nonatomic, retain) NSString * dealerText;    
@property (nonatomic, retain) NSString * dealerWeb; 
@property (nonatomic, retain) NSString * dealerLongitude;   
@property (nonatomic, retain) NSString * dealerLatitude;    
@property (nonatomic, retain) NSString *dealerDistance; 
@property float dealerDistance2;
@end

Adealer.m

#import "Adealer.h"
@implementation Adealer
@synthesize dealerAdressCity, dealerAdressStreet, dealerAdressZip, dealerID, dealerImages, dealerLogo;
@synthesize dealerMail, dealerName, dealerProducts, dealerTel, dealerText, dealerWeb;
@synthesize dealerLongitude, dealerLatitude, dealerDistance,dealerDistance2;
- (NSString *)description {
// Added extension of description

NSMutableString *string = [NSMutableString string];

[string appendString:@"\ntheDealer object and it's properties:\n"];

[string appendFormat:@"dealerName = %@\n", dealerName];
[string appendFormat:@"dealerAdressStreet = %@\n", dealerAdressStreet];
[string appendFormat:@"dealerAdressZip = %@\n", dealerAdressZip];
[string appendFormat:@"dealerAdressCity = %@\n", dealerAdressCity];

[string appendFormat:@"dealerTel = %@\n", dealerTel];
[string appendFormat:@"dealerMail = %@\n", dealerMail];
[string appendFormat:@"dealerWeb = %@\n", dealerWeb];

[string appendFormat:@"dealerLogo = %@\n", dealerLogo];
[string appendFormat:@"dealerImages = %@\n", dealerImages];
[string appendFormat:@"dealerText = %@\n", dealerText];
[string appendFormat:@"dealerProducts = %@\n", dealerProducts];

[string appendFormat:@"dealerLongitude = %@\n", dealerLongitude];
[string appendFormat:@"dealerLatitude = %@\n", dealerLatitude];
[string appendFormat:@"dealerDistance = %@\n", dealerDistance];
[string appendFormat:@"dealerDistance2 = %f\n\n", dealerDistance2];
return string;
}
@end

Answer 1

<强>解决！如果其他人需要它，请发布。

解决方案

在我的“detailsVC”中，我首先做了这个iVar声明;

·H：

Adealer *theDealer;
@property (nonatomic, retain) Adealer *theDealer;

的.m：

@synthesize theDealer;

然后在我的“listVC”中，我这样做是为了将Adealer对象及其属性传递给“detailsVC”（请记住，Adealer对象早先已经在所描述的“循环”中获得了它的属性）;

而不是我之前的;

destVC.restGPSTransfer = [_dealerFeed objectAtIndex:myIndexPath.row];

我把它改成了;

destVC.theDealer = [_dealerFeed objectAtIndex:myIndexPath.row];

要实际显示并检查“detailsVC”中的转移财产，我现在可以简单地调用它来获取经销商名称（或任何其他属性）;

self.labelRestName.text = theDealer.dealerName;
NSLog(@"theDealer.name = %@",theDealer.dealerName);

效果很好！快乐的编码每个人！

如何从我的NSDirectory中获取数据（而不仅仅是属性错误）？

1 个答案: