UINavigationBar iphone 中 setBackBarButtonItem 中的 UIImage

发布于 2024-10-20 19:04:58 字数 605 浏览 3 评论 0原文

我在导航栏的 BackBarButtonItem 中添加图像，图像进入按钮，但图像未缩放以填充可能出现的问题。

这是我正在使用的代码，它以以下方式显示。

UIImage *backImage = [UIImage imageNamed:@"back.png"];
UIBarButtonItem *newBackButton = [[UIBarButtonItem alloc] initWithImage:backImage style:UIBarButtonItemStylePlain target:self action:@selector(backAction)];
[self.navigationItem setBackBarButtonItem: newBackButton];
[newBackButton release];
[backImage release];

在此处输入图像描述

实际上它应该如下图所示。

在此处输入图像描述

谢谢！

原文

I am adding image in BackBarButtonItem of navigation bar, image gets in button but image is not scale to fill what would be the issue.

Here is the code i am using and it displays in following way.

UIImage *backImage = [UIImage imageNamed:@"back.png"];
UIBarButtonItem *newBackButton = [[UIBarButtonItem alloc] initWithImage:backImage style:UIBarButtonItemStylePlain target:self action:@selector(backAction)];
[self.navigationItem setBackBarButtonItem: newBackButton];
[newBackButton release];
[backImage release];

enter image description here

Actually it should look like, below image.

enter image description here

Thanks!

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贩梦商人 2024-10-27 19:04:59

[self.navigationItem setHidesBackButton:YES];
[self.navigationItem setLeftBarButtonItem:newBackButton];

试试这个:)！

[self.navigationItem setHidesBackButton:YES];
[self.navigationItem setLeftBarButtonItem:newBackButton];

Try this :)!

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自控 2024-10-27 19:04:59

problem is your image size.check it!
You can also use

//custom back button
    button =  [UIButton buttonWithType:UIButtonTypeCustom];
    [button setBackgroundImage:[UIImage imageNamed:@"back.png"] forState:UIControlStateNormal];

    [button addTarget:self action:@selector(backButtonClicked) forControlEvents:UIControlEventTouchUpInside];
    [button setFrame:CGRectMake(-2, 0, 52, 30)];



    UIBarButtonItem *btnItem = [[UIBarButtonItem alloc] initWithCustomView:button];
    self.navigationItem.leftBarButtonItem = btnItem;
    [btnItem release];
}

problem is your image size.check it!
You can also use

//custom back button
    button =  [UIButton buttonWithType:UIButtonTypeCustom];
    [button setBackgroundImage:[UIImage imageNamed:@"back.png"] forState:UIControlStateNormal];

    [button addTarget:self action:@selector(backButtonClicked) forControlEvents:UIControlEventTouchUpInside];
    [button setFrame:CGRectMake(-2, 0, 52, 30)];



    UIBarButtonItem *btnItem = [[UIBarButtonItem alloc] initWithCustomView:button];
    self.navigationItem.leftBarButtonItem = btnItem;
    [btnItem release];
}

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