减少UINavigationBar中栏按钮项之间的空白

Question

我注意到条形按钮项之间的空白区域非常大.我想减少空间,为我的头衔留出更多空间.我试图创建固定空间然后在按钮之间添加它但它不起作用.有谁知道怎么做？

UIBarButtonItem *fixedItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace target:nil action:nil];
    fixedItem.width = 10.0f;
self.navigationItem.rightBarButtonItems = @[settingsButtonItem, fixedItem, speakerButtonItem, fixedItem, favouriteButtonItem];

Answer 1

你很接近，但你需要的是一个负的固定空间。如果您的其他 UIBarButtonItems 使用自定义视图，请检查框架中的这些视图。下面是添加两个更靠近边缘的右栏按钮项目的示例。在您的情况下，您还需要在按钮之间添加负空间。

UIBarButtonItem *negativeSpace = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace target:nil action:nil];
    negativeSpace.width = -8;

UIButton *backButton = [UIButton buttonWithType:UIButtonTypeCustom];
backButton.frame = CGRectMake(0, 0, 44, 44);
[backButton setImage:[[UIImage imageNamed:@"ic_back"] imageWithRenderingMode:UIImageRenderingModeAlwaysTemplate]
            forState:UIControlStateNormal];
backButton.imageView.tintColor = [UIColor whiteColor];
[backButton addTarget:self
               action:@selector(backPressed)
     forControlEvents:UIControlEventTouchUpInside];

self.backNavButton = [[UIBarButtonItem alloc] initWithCustomView:backButton];
self.backNavButton.enabled = NO;

UIButton *forwardButton = [UIButton buttonWithType:UIButtonTypeCustom];
forwardButton.frame = CGRectMake(0, 0, 44, 44);
[forwardButton setImage:[forwardImage imageWithRenderingMode:UIImageRenderingModeAlwaysTemplate]
               forState:UIControlStateNormal];
forwardButton.imageView.tintColor = [UIColor whiteColor];
[forwardButton addTarget:self
                  action:@selector(forwardPressed)
        forControlEvents:UIControlEventTouchUpInside];

self.forwardNavButton = [[UIBarButtonItem alloc] initWithCustomView:forwardButton];
self.forwardNavButton.enabled = NO;

self.navigationItem.rightBarButtonItems = @[negativeSpace,self.forwardNavButton,self.backNavButton];