如何在Objective-C中使用自定义委托

代理对于手动控制应用程序中视图控制器数组内的传输非常有用.使用代理,您可以很好地管理控制流程.

这是自己代表的一个小例子....

创建协议类....(仅限.h)

SampleDelegate.h

#import
@protocol SampleDelegate
@optional

#pragma Home Delegate

-(NSString *)getViewName;

@end

在要为其他类委托的类中导入上面的协议类.在我的前任.我使用AppDelegate来创建HomeViewController的Object的委托.

还在Delegate Reference <>中添加了DelegateName

ownDelegateAppDelegate.h

#import "SampleDelegate.h"

@interface ownDelegateAppDelegate : NSObject 
{


}

ownDelegateAppDelegate.m

//setDelegate of the HomeViewController's object as
[homeViewControllerObject setDelegate:self];

//add this delegate method definition
-(NSString *)getViewName
{
    return @"Delegate Called";
}

HomeViewController.h

#import
#import "SampleDelegate.h"

@interface HomeViewController : UIViewController 
{

    iddelegate;
}

@property(readwrite , assign) iddelegate;

@end

HomeViewController.h

- (void)viewDidAppear:(BOOL)animated 
{

    [super viewDidAppear:animated];
    UILabel *lblTitle = [[UILabel alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
    lblTitle.text = [delegate getViewName];
    lblTitle.textAlignment = UITextAlignmentCenter;
    [self.view addSubview:lblTitle];

}