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改变UINavigationBar的后退按钮

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我有这个代码更改了我的UINavigationBar的后退按钮

// Set the custom back button
UIImage *buttonImage = [UIImage imageNamed:@"backag.png"];

//create the button and assign the image
UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
[button setImage:buttonImage forState:UIControlStateNormal];
[button setImage:[UIImage imageNamed:@"selback.png"] forState:UIControlStateHighlighted]; 
button.adjustsImageWhenDisabled = NO;


//set the frame of the button to the size of the image (see note below)
button.frame = CGRectMake(0, 0, 30, 30);

[button addTarget:self action:@selector(back) forControlEvents:UIControlEventTouchUpInside];

//create a UIBarButtonItem with the button as a custom view
UIBarButtonItem *customBarItem = [[UIBarButtonItem alloc] initWithCustomView:button];
self.navigationItem.leftBarButtonItem = customBarItem;

// Cleanup
[customBarItem release];

如果我把它放在viewDidLoad方法中它工作正常 . 但是，当我加载下一个视图时，旧样式按钮会显示出来 . 为了解决这个问题，我尝试将此代码放在下一个视图的viewDidLoad方法中，但之后没有任何按钮可见 .

关于可能导致这种情况的任何想法？

谢谢！

iphone uinavigationcontroller uinavigationbar uinavigationitem

3 回答

  • 1

    我在两个视图中都使用了tis代码，它工作得很好......

    //在两个视图的viewDidLoad方法中添加以下代码...

    UIButton *leftButton1 = [UIButton buttonWithType:UIButtonTypeCustom];    
[leftButton1 setImage:[UIImage imageNamed:@"Viewone.png"] forState:UIControlStateNormal];    
leftButton1.frame = CGRectMake(0, 0, 30, 30);
[leftButton1 addTarget:self action:@selector(yourclickevent) forControlEvents:UIControlEventTouchUpInside];        
self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:leftButton1];
[leftButton1 release];

UIButton *leftButton = [UIButton buttonWithType:UIButtonTypeCustom];    
[leftButton setImage:[UIImage imageNamed:@"ViewSecond.png"] forState:UIControlStateNormal];    
leftButton.frame = CGRectMake(0, 0, 30, 30);
[leftButton addTarget:self action:@selector(yourclickevent) forControlEvents:UIControlEventTouchUpInside];        
self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:leftButton];
[leftButton release];

    希望，这会帮助你...享受..

    回复于
  • 2

    应用相同的代码

    -(void)viewDidAppear:(BOOL)animated
{

}
    回复于
  • 0

    您需要确保在navigationItem上设置hidesBackButton属性：

    // Setup custom back button
self.navigationItem.hidesBackButton = YES;
    回复于

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