Question

我开始了为ios学习objective-c的无畏之旅，并且当我意识到我无法将我正在创建的按钮链接到我的文件时，尝试在界面构建器中构建我的视图。所有者。我确保我的文件所有者选择了我的视图控制器，并尝试重新启动xcode和界面构建器。这是我的.h和.m文件的内容：

我的CalculatorViewController.h文件：

#import <UIKit/UIKit.h>
#import "CalculatorBrain.h"
@interface CalculatorViewController : UIViewController {
     IBOutlet UILabel *display;
     CalculatorBrain *brain;
}
- (IBAction):digitPressed:(UIButton *)sender;
- (IBAction):operationPressed:(UIButton *)sender;

@end

和CalculatorViewController.m文件：

#import "CalculatorViewController.h"

@implementation CalculatorViewController

- (void)didReceiveMemoryWarning {
    // Releases the view if it doesn't have a superview.
    [super didReceiveMemoryWarning];

    // Release any cached data, images, etc that aren't in use.
}

- (void)viewDidUnload {
    // Release any retained subviews of the main view.
    // e.g. self.myOutlet = nil;
}


- (void)dealloc {
    [super dealloc];
}

@end

简而言之，每次我点击Interface Builder视图中的按钮，按住CTRL，然后将蓝线拖到“文件所有者”，就没有任何反应。在我正在观看的教程中（The Stanford Fall 2010 IOS教程，第2课 - 如果有帮助的话）显示File的所有者突出显示并像冠军一样工作。任何帮助将非常感激。谢谢！

Answer 1

IBActions的定义无效。（额外结肠）

更改

- (IBAction):digitPressed:(UIButton *)sender;
- (IBAction):operationPressed:(UIButton *)sender;

要

- (IBAction) digitPressed:(UIButton *)sender;
- (IBAction) operationPressed:(UIButton *)sender;

Answer 2

所以你想把你的按钮与IBAction联系起来？我弄错了吗？您需要右键单击按钮，选择事件（通常是Touch Up Inside），然后将（从事件的圆圈向右）拖动到所有者。现在，如果您想要将某些内容挂钩到IBOutlet（通常使用UITextField等），您可以将文件所有者拖到控件上，然后从弹出窗口中选择插座。

Answer 3

 #import "CalculatorViewController.h"

@implementation CalculatorViewController

- (void)didReceiveMemoryWarning {
    // Releases the view if it doesn't have a superview.
    [super didReceiveMemoryWarning];

    // Release any cached data, images, etc that aren't in use.
}

   - (void)viewDidUnload {
    // Release any retained subviews of the main view.
    // e.g. self.myOutlet = nil;
}

- (IBAction):digitPressed:(UIButton *)sender{
}
- (IBAction):operationPressed:(UIButton *)sender{
}
- (void)dealloc {
    [super dealloc];
}

@end

Answer 4

- (IBAction)

后应该没有冒号

Answer 5

2件事：

- (IBAction)

之后不能有任何冒号

将此行添加到您的代码中。

//。h file

IBOutlet UIButton *yourButtonName;


@property (nonatomic, retain)IBOutlet UIButton *yourButtonName;

/.m file

@synthesize yourButtonName;

现在拖动它就可以了。

无法在XCode中将UIButton与文件所有者链接起来

5 个答案: