此类与键setOutput的键值编码不兼容

本文介绍了此类与键setOutput的键值编码不兼容的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 问题描述

我是iOS/Objective-C的新手，正在尝试学习.我正在Sam的自学iOS中关注.我正在执行一个名为Hello Noun的项目，该项目不显示Hello World，而是接收输入并显示"Hello Input".

I am brand new to iOS/Objective-C and I am trying to learn. I am following along in Sam's Teach yourself iOS. I am doing a project called Hello Noun, where instead of displaying Hello World, it takes an input and displays "Hello Input".

在项目上工作，一切都很好，没有错误.但是当我去Build然后运行该应用程序时，它崩溃了；

Working on the project, everything was fine, and there were no errors. But when I went to Build and then Run the app, it crashed saying;

'NSUnknownKeyException', reason: '[<ViewController 0xa064620> setValue:forUndefinedKey:]: this class is not key value coding-compliant for the key setOutput.'

并指向突出显示这些行的main.m文件；

and pointed to main.m file highlighting these lines;

#import <UIKit/UIKit.h> #import "AppDelegate.h" int main(int argc, char * argv[]) { @autoreleasepool { return UIApplicationMain(argc, argv, nil, NSStringFromClass([AppDelegate class])); } }

其余的代码在下面；

ViewController.m

ViewController.m

@interface ViewController () @property (weak, nonatomic) IBOutlet UILabel *userOutput; @property (weak, nonatomic) IBOutlet UITextField *userInput; - (IBAction)setOutput:(id)sender; @end @implementation ViewController - (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view, typically from a nib. } - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated. } - (IBAction)setOutput:(id)sender { self.userOutput.text=self.userInput.text; } @end

我对此很陌生，我只是想了解我的情况，所以我不太确定发生了什么.任何帮助将不胜感激.

I am new to this, and I'm just getting my bearings so I'm not quite sure what is happening. Any help would be beyond appreciated.

推荐答案

转到您的ViewController xib/Storyboard，右键单击File's Owner，您会发现一个黄色的警报图标，那里的连接已删除，它应该可以解决您的问题

Go to your ViewController xib/Storyboard right click on the File's Owner you should find a yellow alert icon there delete that connection , it should solve your problem.