故事板自定义类被忽略

Question

我正在尝试将自定义视图控制器添加到我的故事板中。视图控制器KTResearchUploadViewController出现在“自定义类”类下拉列表中，我已选择它。在视图控制器内（在故事板上），我有一个链接到KTResearchUploadViewController的按钮，可以在主要操作上调用方法handleUploadButtonPress。

按下按钮时，我收到此错误：

Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[UIViewController handleUploadButtonPress:]: unrecognized selector sent to instance 0x11c33b740'

看起来它试图在handleUploadButtonPress而不是UIViewController上呼叫KTResearchUploadViewController。我在这里做错了什么？

KTResearchUploadViewController.h

#import <UIKit/UIKit.h>

@interface KTResearchUploadViewController : UIViewController

@end

KTResearchUploadViewController.m

#import "KTResearchUploadViewController.h"

@interface KTResearchUploadViewController ()

@end

@implementation KTResearchUploadViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view.
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}
- (IBAction)handleUploadButtonPress:(id)sender {
    NSLog(@"Button pressed!");
}

@end

Answer 1

将IBAction添加到.h

#import <UIKit/UIKit.h>

@interface KTResearchUploadViewController : UIViewController
- (IBAction)handleUploadButtonPress:(id)sender;
@end

还要确保IB中的按钮与代码之间存在连接

https://developer.apple.com/library/content/referencelibrary/GettingStarted/DevelopiOSAppsSwift/ConnectTheUIToCode.html

Answer 2

我不确定这是否是原始问题的原因，但是我刚刚遇到了类似的问题，然后就此结束了。最终，我发现我的ViewController子类不是我在Xcode中运行的目标的成员。出于某种原因，在这种情况下，它仅默认使用ViewController。