为什么 NSOrderedSet 信息被删除或信息有时会消失?
在应用程序中,我得到一个带有 JSON 格式数据的字符串,因此我使用 NSOrderedSet 根据从键接收到的信息对数据进行排序,如方法“finishedReceivingData”中所示,但是当我使用该 NSOrderedSet 填充列表时 PickerVied 信息存储在 NSOrderedSet 中的清除垃圾或其他信息出现。
谢谢有人能告诉我为什么在其他metos中调用NSOrderedSet时信息被删除,比如当我调用pickerView“numberOfRowsInComponent”的方法时
。H
#import <UIKit/UIKit.h>
#import "RestConnectionDelegate.h"
#import "ViewController.h"
@class RestConnection;
@interface attentionCenterViewController : UIViewController<RestConnectionDelegate,UIPickerViewDelegate,UIPickerViewDataSource>{
@private RestConnection *restConnection;
IBOutlet UIPickerView *pvList;
NSDictionary *json;
NSData *encodData;
}
- (IBAction)cbDepto:(id)sender;
- (IBAction)cbCity:(id)sender;
- (IBAction)cbAttent:(id)sender;
- (IBAction)cbFind:(id)sender;
@property (strong, nonatomic) NSOrderedSet *deptoArray;
@end
.m
#import "attentionCenterViewController.h"
#import "RestConnection.h"
@interface attentionCenterViewController (){
NSString *service;
}
@end
@implementation attentionCenterViewController
#define baseURL @"http://another url"
#pragma mark Setup and Teardown Methods
- (void)viewDidLoad {
[super viewDidLoad];
restConnection = [RestConnection new];
restConnection.baseURLString = baseURL;
restConnection.delegate = self;
viewList.hidden=true;
}
- (void)dealloc {
[restConnection release];
[txtDepto release];
[txtCity release];
[txtAttent release];
[viewList release];
[pvList release];
[super dealloc];
}
#pragma mark RestConnectionDelegate
- (void)finishedReceivingData:(NSData *)data
{
encodData = [[restConnection stringData] dataUsingEncoding:NSUTF8StringEncoding];
json = [NSJSONSerialization JSONObjectWithData:encodData options:0 error:nil];
NSLog(@"Diccionario JSON: %@", json);
if ([service isEqual:@"Depto"]) {
//In this place full array
_deptoArray=[NSOrderedSet orderedSetWithArray:[json valueForKey:@"Nombre"]];
NSLog(@"solo nombre: %@", _deptoArray);
pvList.delegate=self;
viewList.hidden=false;
}
}
- (IBAction)cbDepto:(id)sender {
NSString *urlString = [NSString stringWithFormat:@"ConsultaDepartamentos"];
[restConnection performRequest:
[NSURLRequest requestWithURL:
[NSURL URLWithString:urlString]]];
service=@"Depto";
}
-(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView{
return 1;
}
-(NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component{
if ([service isEqualToString:@"Depto"]) {
NSLog(@"en el picket: %@", _deptoArray);
NSLog(@"data: %@", encodData);
return [_deptoArray count];
}else{
return 0;
}
}
@end
“finishedReceivingData”中 deptoArray 的日志
2014-11-30 18:40:33.976 Salud Total[2629:132519] 独奏名称:(“Bogot\U00e1 DC”,安蒂奥基亚,大西洋)
“numberOfRowsInComponent”中 deptoArray 的日志 2014-11-30 18:42:27.279 Salud Total[2629:132519] 数据:{}
或消息: Thead 1: EXC_BAD_ACCESS(code=EXC_I386_GPFLT) 或 2014-11-30 18:44:34.311 Salud Total[2650:133534] 数据:(无索引)