需要为API调用开发自定义委托

Question

我想开发自定义连接类，通过它我可以使用它进行API调用。我不想使用任何第三方apis，如afhttprequest或asihttp。

我想发展自己这种代表。我搜索了很多东西，但我在CustomDelegates中没有太多想法。

Answer 1

我写了一个自定义委托的例子。

1. 从ViewController.m我们调用带有两个数字的方法来添加另一个类（加法类）
2. 添加类将添加这两个数字并调用委托方法，以便我们可以使用自定义委托在ViewController中获得该两个数字的答案。

Addition.h

#import <Foundation/Foundation.h>

    // write protocal for this class
    // you can give any name of that protocol

    @protocol AdditionDelgate <NSObject>
    // delegate method of this delegate
    -(void)answerOfTwoNumberAddition:(int)ans;
    @end


        @interface Addition : NSObject
        {

        }
        // set property of that protocol, so using that we can call that protocol methods (i.e. ansOfYourAns)
        @property (nonatomic, weak) id <AdditionDelgate> delegate;
        -(void) addThisNumber:(int) firstNumber withSecondNumber:(int)secondNumber;

        @end

Addition.m

#import "Addition.h"

@implementation Addition

    -(void)addThisNumber:(int)firstNumber withSecondNumber:(int)secondNumber
    {
        int ans = firstNumber + secondNumber;

        // call delegate method of "AdditionDelgate" protocol
        // we already set delegate of viewController to this protocol
        // so it will call viewController class "answerOfTwoNumberAddition" method
        [self.delegate answerOfTwoNumberAddition:ans];
    }
    @end

ViewController.h

#import <UIKit/UIKit.h>

// import addition class
#import "Addition.h"

// set AdditionDelgate to class 
@interface ViewController : UIViewController <AdditionDelgate>
@end

ViewController.m

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];

    // creat object of class
    Addition * additionObj = [[Addition alloc] init];
    // set delegate as self to that so that methods delegate methods will call
    additionObj.delegate = self;
    // call method
    [additionObj addThisNumber:2 withSecondNumber:3];
}

#pragma mark ----- Delegate method of Addition view ----
// this is delegate method of Addition class, it will call from "addThisNumber" method line of code
// ([self.delegate answerOfTwoNumberAddition:ans];)

-(void)answerOfTwoNumberAddition:(int)ans
{
    NSLog(@"addition of two number is %d",ans);
}

@end

我希望它能帮到你