How to remove padding next to a UIBarButtonItem

问题

I have added a custom button to the navigation bar's custom right bar button item as shown in the image.

I'm want to be able to remove the space after the button so that it touches the right edge of the screen but couldn't find a solution even after searching. If someone could mention how, would be great.

This is the code I'm using

UIButton *aButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];    
aButton.frame = CGRectMake(50.0, 0.0, 60, 44);
UIBarButtonItem *aBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:aButton];
[aButton addTarget:self action:@selector(testButtonControl:) forControlEvents:UIControlEventTouchUpInside];

self.navigationItem.rightBarButtonItem = aBarButtonItem;

回答1:

You can add a fixed space element with a negative width (I know, this sounds like a hack, but it works):

UIButton *aButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];    
aButton.frame = CGRectMake(50.0, 0.0, 60, 44);
UIBarButtonItem *aBarButtonItem = [[UIBarButtonItem alloc] initWithCustomView:aButton];
[aButton addTarget:self action:@selector(testButtonControl:) forControlEvents:UIControlEventTouchUpInside];

UIBarButtonItem *spaceFix = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace target:nil action:NULL];
spaceFix.width = -5;

self.navigationItem.rightBarButtonItems = @[spaceFix, aBarButtonItem];

回答2:

You have to create a new view, add button and everything else you want and add it to the titleView as shown.

- (void)viewDidLoad {
    self.navigationItem.titleView = [self titleView];
}

- (UIView *)titleView {
    CGFloat navBarHeight = self.navigationController.navigationBar.frame.size.height;
    CGFloat width = 0.95 * self.view.frame.size.width;
    UIView *containerView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, width, navBarHeight)];
..
// please add what you need here
....
}

回答3:

You can't, unless you subclass UINavigationBar or override its methods via category.

回答4:

You can do this by adding a UIView then add inside it your button with x=spaceWidth y = 0.

look at the below code for the right item (this is inside UINavigationItem category)

1 -

UIView *_rightView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 44, 44)]; [_rightView setBackgroundColor:[UIColor purpleColor]];//debug color

    UIButton *aLeftButton = [[UIButton alloc] init];

   //...//

    aLeftButton.frame = CGRectMake(-15, 0, 44, 44);//in your case +15
    [aLeftButton setBackgroundImage:[UIImage imageNamed:buttonName] forState:UIControlStateNormal];
    [aLeftButton setBackgroundImage:[UIImage imageNamed:[buttonName stringByAppendingString:@"Selected"]] forState:UIControlStateSelected];
    [aLeftButton setAdjustsImageWhenDisabled:NO];
    [aLeftButton setAdjustsImageWhenHighlighted:NO];

    [aLeftButton addTarget:theSender action:aSelector forControlEvents:UIControlEventTouchUpInside];
    [_rightView addSubview:aLeftButton];
    UIBarButtonItem *aBarButton = [[UIBarButtonItem alloc] initWithCustomView:_rightView];
    [leftBarButtonsItem addObject:aBarButton];`

self.leftBarButtonItem = leftBarButtonsItem;

来源：https://stackoverflow.com/questions/11814983/how-to-remove-padding-next-to-a-uibarbuttonitem

标签

xcode

uinavigationbar

uibarbuttonitem