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在我的项目(“Xcode 4.3.2 - Single View Application”)中,我手动添加了一个带有按钮项的工具栏,我需要以编程方式更新按钮标签。我怎样才能做到这一点?请你帮助我好吗?

视图控制器.h

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController <UIWebViewDelegate>{
    IBOutlet UIWebView *webDisplay;
    IBOutlet UIToolbar *menuBar; //my toolBar
}
@property(nonatomic,retain) UIWebView *webDisplay;
@property(nonatomic,retain) UIToolbar *menuBar;

- (IBAction) changeLabel:(id)sender;

@end

视图控制器.m

- (IBAction) changeLabel:(id)sender{

  //code for updating label

}
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2 回答 2

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@interface ViewController : UIViewController <UIWebViewDelegate>{
    IBOutlet UIWebView *webDisplay;
    IBOutlet UIToolbar *menuBar; //my toolBar
    IBOutlet UIBarButtonItem *barButton;
}
...

- (IBAction) changeLabel:(id)sender{

barButton.title = @"test";

}

请务必将 BarButtonItem 设置为引用插座“barButton”

于 2012-04-10T11:48:48.947 回答
0
#import <UIKit/UIKit.h>

@interface ViewController : UIViewController <UIWebViewDelegate>{

IBOutlet UIWebView *webDisplay;
IBOutlet UIToolbar *menuBar; //my toolBar

  UIButton* btnBack;
}

@property(nonatomic,retain) UIWebView *webDisplay;

@property(nonatomic,retain) UIToolbar *menuBar;

- (IBAction) changeLabel:(id)sender;

@end

视图控制器.m

btnBack = [UIButton buttonWithType:UIButtonTypeCustom];
[btnBack setFrame:CGRectMake(0, 0, 49, 30)];
[btnBack setBackgroundImage:[UIImage imageNamed:@"backbtn.png"] forState:UIControlStateNormal];
[btnBack.titleLabel setFont:[UIFont boldSystemFontOfSize:12]];
UIBarButtonItem *abackButton = [[UIBarButtonItem alloc] initWithCustomView:btnBack]



- (IBAction) changeLabel:(id)sender{

//code for updating label
[btnBack setTitle:NSLocalizedString(@"Detail_Back", nil) forState:UIControlStateNormal];

}
于 2012-04-10T11:53:24.123 回答