将 UIBarButtonSystemItemAdd 和 UIBarButtonSystemItemTrash 添加到导航项或 UISegmentedControl 的一侧

发布于 2024-08-16 21:19:39 字数 201 浏览 8 评论 0原文

我想要一个 UIViewController ，它在标题右侧有一个“添加”和一个“垃圾箱”按钮，可以通过向导航项/栏添加两个 UIBarButtonItems 或添加将它们添加到 UISegmentedControl 中，然后将 SegmentedControl 添加到项目中。这可能吗？如果是，如何实现最好？

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謸气贵蔟 2024-08-23 21:19:39

您可以通过将多个按钮包装在 UIToolbar 中来向导航项添加多个按钮，示例代码< /a>.

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不知所踪 2024-08-23 21:19:39

我也做过类似的事情。我通过创建一个包含两个 UIButton 的 UIView 子类，将两个 UIButton 添加到导航项/栏。然后，您可以执行以下操作：

MyUIViewSubclass *tempview = [[[MyUIViewSubclass alloc] initWithFrame:CGRectMake(234,4,84,30)] autorelease];
UIBarButtonItem newButton = [[[UIBarButtonItem alloc] initWithCustomView:tempview] autorelease];
[self.navigationItem setRightBarButtonItem:newButton animated:NO];

您所要做的就是在 MyUIViewSubclass 中布局按钮，就可以了。

此外，我还在自定义 init 命令中传递目标 ID，以便更轻松地定位视图中的按钮。因此，对于 MyUIViewSubclass 而不是 initWithFrame，我有这样的东西：

- (id)initWithFrame:(CGRect)aRect andTarget:(id)newTarget {
    if (self = [super initWithFrame:aRect]) {



        UIButton *editbtn = [[[UIButton alloc]  initWithFrame:fframe] autorelease];
        [editbtn addTarget:newTarget action:@selector(MBEdit) forControlEvents:UIControlEventTouchUpInside];

        [self addSubview:editbtn];
        [self setFirstbutton:editbtn];
        [editbtn release];



        UIButton *newbtn = [[[UIButton alloc]  initWithFrame:fframe] autorelease];
        [newbtn addTarget:newTarget action:@selector(MBNew) forControlEvents:UIControlEventTouchUpInside];

        [self addSubview:newbtn];
        [self setSecondbutton:newbtn];
        [newbtn release];

    }

    return self;

}

I have done something similar. I've added two UIButtons to a navigation item/bar by creating a UIView subclass that has two UIButtons in it. You can then do something like this:

MyUIViewSubclass *tempview = [[[MyUIViewSubclass alloc] initWithFrame:CGRectMake(234,4,84,30)] autorelease];
UIBarButtonItem newButton = [[[UIBarButtonItem alloc] initWithCustomView:tempview] autorelease];
[self.navigationItem setRightBarButtonItem:newButton animated:NO];

All you have to do is layout the buttons in MyUIViewSubclass and you're good.

Also, I pass the ID of the target along in a customized init command to make for easier targeting of the buttons in the view. So for MyUIViewSubclass instead of initWithFrame, I have something like this:

- (id)initWithFrame:(CGRect)aRect andTarget:(id)newTarget {
    if (self = [super initWithFrame:aRect]) {



        UIButton *editbtn = [[[UIButton alloc]  initWithFrame:fframe] autorelease];
        [editbtn addTarget:newTarget action:@selector(MBEdit) forControlEvents:UIControlEventTouchUpInside];

        [self addSubview:editbtn];
        [self setFirstbutton:editbtn];
        [editbtn release];



        UIButton *newbtn = [[[UIButton alloc]  initWithFrame:fframe] autorelease];
        [newbtn addTarget:newTarget action:@selector(MBNew) forControlEvents:UIControlEventTouchUpInside];

        [self addSubview:newbtn];
        [self setSecondbutton:newbtn];
        [newbtn release];

    }

    return self;

}

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