Question

在我的项目（“Xcode 4.3.2 - 单视图应用程序”）中，我手动添加了一个带有按钮项的ToolBar，我需要以编程方式更新按钮标签。我怎样才能做到这一点？你能帮我吗？

ViewController.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

ViewController.m

- (IBAction) changeLabel:(id)sender{

  //code for updating label

}

Answer 1

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

- (IBAction) changeLabel:(id)sender{

barButton.title = @"test";

}

务必将BarButtonItem设置为Referencing Outlet“barButton”

Answer 2

#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

ViewController.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];

}

xCode - 工具栏按钮项目标签更改

2 个答案: