在不同的視圖控制器中使用相同的編碼集

Question

我有一組相同的編碼必須在不同的視圖控制器中使用。我必須做什麼，以避免在每個視圖控制器中重複編碼。我無法找到在谷歌的確切解決方案。請任何人幫助我。

[super viewDidLoad]; 
// Do any additional setup after loading the view from its nib. 
//NSLog(@"%d",rowno); 

NSString *urlString=[NSString stringWithFormat:@"http://www.tranzlogix.com/tranzlogix_webservice/vehiclelist.php?format=json"]; 

NSURL *url=[NSURL URLWithString:urlString]; 
NSData *data=[NSData dataWithContentsOfURL:url]; 
NSError *error; 
//NSLog(@"%@",data); 

NSDictionary *json = [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:&error]; 
//NSLog(@"%@",json); 

results = [json valueForKey:@"posts"]; 
//NSLog(@"%@", results); 
//NSLog(@"Count %d", results.count); 

NSArray *res = [results valueForKey:@"post"]; 
//NSLog(@"%@", res); 

Vehicle_No=[res valueForKey:@"vehicle_no"]; 
//NSLog(@"%@", Vehicle_No); 

Vehicle_No_Org =[Vehicle_No objectAtIndex:rowno]; 
NSString *CellText=[NSString stringWithFormat:@"%@",Vehicle_No_Org]; 
//NSLog(@"%@",CellText); 

//MAP VIEW WebService 

NSString *urlMapString=[NSString stringWithFormat:@"http://www.tranzlogix.com/tranzlogix_webservice/map.php?format=json&truckno=%@",CellText]; 

//NSLog(@"%@",urlMapString); 

NSURL *urlMap=[NSURL URLWithString:urlMapString]; 
NSData *dataMap=[NSData dataWithContentsOfURL:urlMap]; 
NSError *errorMap; 
//NSLog(@"%@",dataMap); 

NSDictionary *jsonMap = [NSJSONSerialization JSONObjectWithData:dataMap options:kNilOptions error:&errorMap]; 
//NSLog(@"%@",jsonMap); 

NSArray *resultsMap = [jsonMap valueForKey:@"posts"]; 
NSLog(@"%@", resultsMap); 
//NSLog(@"Count %d", resultsMap.count); 

NSArray *resMap = [resultsMap valueForKey:@"post"]; 
//NSLog(@"%@", resultsMap); 

NSArray *latitudeString=[resMap valueForKey:@"latitude"]; 
NSLog(@"%@", latitudeString); 
NSString *latOrgstring = [latitudeString objectAtIndex:0]; 
NSLog(@"%@", latOrgstring); 
double latitude=[latOrgstring doubleValue]; 
//NSLog(@"latdouble: %f", latitude); 


NSArray *longitudeString=[resMap valueForKey:@"longitude"]; 
NSLog(@"%@", longitudeString); 
NSString *longOrgstring = [longitudeString objectAtIndex:0]; 
NSLog(@"%@", longOrgstring); 
double longitude=[longOrgstring doubleValue]; 
NSLog(@"latdouble: %f", longitude); 

這就是我需要兩個以上的視圖控制器一個在地圖視圖和表視圖下一個...

Answer 1

與主代碼創建一個基本視圖控制器和創建它的子類。

例如，您的主視圖控制器是：

@interface MainViewController : UIViewController 

然後它的子類：

@interface OneViewController : MainViewController 

這些子類將繼承的代碼。

Answer 2

Here you can use Custom Delegates in ios.. 

just create Custom Delegate(Protocol) in AppDelegate or Singleton Class.Here im using AppDelegate 

#import <UIKit/UIKit.h> 


**AppDeleagte.h** 

@protocol parserDelegate <NSObject> 


-(void)sendDataToCorrespondingViewController:(id)data andServiceName:(NSString *)serviceName; 

@end 

@interface AppDelegate : UIResponder <UIApplicationDelegate> 
{ 

} 

@property (strong, nonatomic) UIWindow *window; 

@property (nonatomic,strong) id <parserDelegate> delegate; 


-(void)getMethodURL:(NSString *)urlString andServiceName:(NSString *)serviceName; 

@end 


**AppDeleagte.m** 

//Implementing getMethod() in AppDelegate.m File 

-(void)getMethodURL:(NSString *)urlString andServiceName:(NSString *)serviceName; 
{ 



    NSURL *url =[NSURL URLWithString:urlString]; 
    NSError *error; 
    { 
     dispatch_sync(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_HIGH, 2), ^{ 


      NSData *data =[[NSData alloc]initWithContentsOfURL:url]; 

      if (data == nil) { 

       NSLog(@"error bcz data is nil:%@",error.localizedDescription); 
      } 
      else 
      { 

       NSError *error; 
       id response =[NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableLeaves error:&error]; 

       [self.delegate sendDataToCorrespondingViewController:response andServiceName:serviceName]; 


      } 
     }); 

    } 
} 


Now import AppDelegate in required ViewController and Create instance For AppDelegate 

**ViewController.h** 

#import <UIKit/UIKit.h> 

#import "AppDelegate.h" 

@interface ViewController : UIViewController<parserDelegate> 
{ 

} 
@property (nonatomic,strong) AppDelegate *appDelegate; 
@end 


**ViewController.m** 

#import "ViewController.h" 

@interface ViewController() 

@end 

@implementation ViewController 

@synthesize appDelegate; 

- (void)viewDidLoad 
{ 

    self.appDelegate =(AppDelegate *)[[UIApplication sharedApplication] delegate]; 
    self.appDelegate.delegate=self; 

    [super viewDidLoad]; 
} 
-(IBAction)getSeviceData:(id)sender 
{ 
    //call AppDeleagte method for Webservice 

    [self.appDelegate getMethodURL:@"http://www.tranzlogix.com/tranzlogix_webservice/vehiclelist.php?format=json" andServiceName:@"VehicleList"]; 

} 
//implement Deleagte method 
-(void)sendDataToCorrespondingViewController:(id)data andServiceName:(NSString *)serviceName 
{ 
    NSLog(@"response data: %@",data); //Here is the response from websevice 
    NSLog(@"serviceName: %@",serviceName); // Here Service name differentiate,if we call 2 webservices in ViewController 
} 

- (void)didReceiveMemoryWarning 
{ 
    [super didReceiveMemoryWarning]; 
    // Dispose of any resources that can be recreated. 
} 

@end