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Protocol And Delegates

MyDelayProcess.h
//
//  MyDelayProcess.h
//  ProtocolExample
//

#import <Foundation/Foundation.h>

@class MyDelayProcess;

@protocol MyDelegate <NSObject>

//
-(void)onCompeteTimer:(NSString *)someMsg;

@end

@interface MyDelayProcess : NSObject

@property(nonatomic,retain) id <MyDelegate> mydelegate;
-(void)startTimer;
-(void)timerComplete;

@end

MyDelayProcess.m

//
//  MyDelayProcess.m
//  ProtocolExample
//

#import "MyDelayProcess.h"

@implementation MyDelayProcess

@synthesize mydelegate;

-(void)startTimer{
    [NSTimer scheduledTimerWithTimeInterval:2 target:self selector:@selector(timerComplete) userInfo:nil repeats:YES];
}

-(void)timerComplete{
    [mydelegate onCompeteTimer:@"Completed"];
}

@end

ViewController.h

//
//  ViewController.h
//  ProtocolExample
//

#import <UIKit/UIKit.h>
#import "MyDelayProcess.h"

@interface ViewController : UIViewController<MyDelegate>{

}

@property (nonatomic,retain)MyDelayProcess *myDelayProcess;

@end

ViewController.m

//
//  ViewController.m
//  ProtocolExample
//

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

@synthesize myDelayProcess;

- (void)viewDidLoad {
    [super viewDidLoad];
    myDelayProcess = [[MyDelayProcess alloc]init];
    [myDelayProcess setMydelegate:self];
    [myDelayProcess startTimer];
    
    
    
    
    // Do any additional setup after loading the view, typically from a nib.
    NSDictionary *subjects = @{@"sub1":@"English",@"sub2":@"Math"};
    NSDictionary *dic = @{@"name":@"Vasu",@"subject":subjects};
    
    for(NSString *key in dic){
        
        NSLog(@"%@",key);
        id value = [dic objectForKey:key];
        if ([value isKindOfClass:[NSString class]]){
            
            NSLog(@"name is %@",value);
            
        }else if ([value isKindOfClass:[NSDictionary class]]){
            NSDictionary *subDic = value;
            
            for (NSString *subKey in subDic) {
                
                NSLog(@"subject %@ is %@",subKey, [subDic objectForKey:subKey]);
            }
        
        }
        
       // NSLog(@"%@",value);
    }
    
    
}

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

#pragma mark - MyDelegate Function implementation

-(void)onCompeteTimer:(NSString *)someMsg{

    NSLog(@"%@",someMsg);
}

@end

iOS

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