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customView on left button of UINavigationBar

开发者 https://www.devze.com 2022-12-21 06:16 出处:网络
I\'m trying to implement UINavigationBar with custom controls. So, I\'ve added UIView on left side of UINavigationBar and trying to add controls to that UIView with following code:

I'm trying to implement UINavigationBar with custom controls. So, I've added UIView on left side of UINavigationBar and trying to add controls to that UIView with following code:

UIView *view = navigationController.navigationItem.leftBarButtonItem.customView;
UIButton *button = [[UIButton alloc] initWithFrame:view.frame];
[button setTitle:@"TEST" forState:UIControlStateNormal];
[view addSubview:button];
[button sizeToFit];
[button release];

Code works, but button doesn't appear.

Any help would be appreciated. Thank you.

UPD

OK, I gave a try to code below and made such thing:

UIButton *button = [[UIButton alloc] initWithFrame:CGRectMake(0, 0, 40, 50)];
[button setTitle:@"XXX" forState:UIControlStateNormal];
UIBarButtonItem *cust开发者_StackOverflow中文版omItem = [[UIBarButtonItem alloc] initWithCustomView:button];
navigationController.visibleViewController.navigationItem.leftBarButtonItem = customItem;
[customItem release];
[button release];

The "XXX" title did appear, but it looks like simple label, not button. Any ideas?


Yes, your UIButton doesn't come with any shading. What I've done is used a UISegmentedControl to get shading for free:

// Add the Menu button to the navigation bar
NSString* menuLabel = "ShadeButton";
CGSize textSize = [menuLabel sizeWithFont:[UIFont systemFontOfSize:15.0]];
UISegmentedControl* menuSegmentedButton = [[UISegmentedControl alloc]
    initWithFrame:CGRectMake(0.0f, 0.0f, textSize.width, 29.0f)];
menuSegmentedButton.momentary = YES;
menuSegmentedButton.selected = NO;
menuSegmentedButton.segmentedControlStyle = UISegmentedControlStyleBar;
[menuSegmentedButton insertSegmentWithTitle:menuLabel atIndex:0
                              animated:NO];
[menuSegmentedButton addTarget:self action:@selector(doMenu)
         forControlEvents:UIControlEventValueChanged];
UIBarButtonItem* barButton = [[UIBarButtonItem alloc] 
    initWithCustomView:menuSegmentedButton];
[menuSegmentedButton release];
self.navigationItem.rightBarButtonItem = barButton;

Create your UIBarButtonItem with the UISegmentedControl as shown above rather than a UIButton and you should get the effect you're after. The alternative is to do more work on the button and create a texture/custom image for it yourself.


Note quite right.

If you just want a different title:

UIBarButtonItem *customItem = [[UIBarButtonItem alloc] initWithTitle:@"TEST" style:UIBarButtonItemStylePlain target:nil action:nil];
navigationController.navigationItem.leftBarButtonItem = customItem;
[customItem release];

If you really want a custom view:

// Create Custom View called myView.
UIBarButtonItem *customItem = [[UIBarButtonItem alloc] initWithCustomView:myView];
navigationController.navigationItem.leftBarButtonItem = customItem;
[customItem release];
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