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在iOS上，如何向右水平移动navigationItem.leftBarButtonItem？

发布于 2024-09-18 06:09:59 字数 145 浏览 2 评论 0原文

自定义的 UINavigationBar 要求我提供自定义的“后退”按钮，我使用 navigationItem.leftBarButtonItem = myCustomizedButton，但其位置是固定的。

有谁能分享一下如何将此按钮向右移动 40 像素吗？

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狼性发作 2024-09-25 06:10:00

您可以创建比图像大 40 像素的包含视图。
以 40 像素偏移添加图像。
添加包含视图作为 leftBarButtonItem。

代码如下：

// Create a containing view to position the button
UIView *containingView = [[[UIView alloc] initWithFrame:CGRectMake(0, 0, barButtonImage.size.width + 40, barButtonImage.size.height)] autorelease];

// Create a custom button with the image
UIButton *barUIButton = [UIButton buttonWithType:UIButtonTypeCustom];
[barUIButton setImage:barButtonImage forState:UIControlStateNormal];
barUIButton.frame = CGRectMake(40, 0, barButtonImage.size.width, barButtonImage.size.height);
[barUIButton addTarget:target action:action forControlEvents:UIControlEventTouchUpInside];

[containingView addSubview:barUIButton];

// Create a container bar button
UIBarButtonItem *containingBarButton = [[[UIBarButtonItem alloc] initWithCustomView:containingView] autorelease];

// Add the container bar button
navigationItem.leftBarButtonItem = containingBarButton;

You can create a containing view that is 40 pixels bigger than your image.
Add your image at 40 pixels offset.
Add the containing view as the leftBarButtonItem.

Code follows:

// Create a containing view to position the button
UIView *containingView = [[[UIView alloc] initWithFrame:CGRectMake(0, 0, barButtonImage.size.width + 40, barButtonImage.size.height)] autorelease];

// Create a custom button with the image
UIButton *barUIButton = [UIButton buttonWithType:UIButtonTypeCustom];
[barUIButton setImage:barButtonImage forState:UIControlStateNormal];
barUIButton.frame = CGRectMake(40, 0, barButtonImage.size.width, barButtonImage.size.height);
[barUIButton addTarget:target action:action forControlEvents:UIControlEventTouchUpInside];

[containingView addSubview:barUIButton];

// Create a container bar button
UIBarButtonItem *containingBarButton = [[[UIBarButtonItem alloc] initWithCustomView:containingView] autorelease];

// Add the container bar button
navigationItem.leftBarButtonItem = containingBarButton;

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