swift – LeftbarButtonItem删除填充？

发布时间：2020-12-14 04:45:49 所属栏目：百科来源：网络整理

导读：我想在UINavigationController中使用一个标识作为LeftbarButtonItem,是否可以删除左边的填充？不幸的是,我试过： let logoView = UIView(frame: CGRectMake(-15,44,44)) logoView.backgroundColor = UIColor.darkGrayColor() var leftBarButtonItem: UIBarB

我想在UINavigationController中使用一个标识作为LeftbarButtonItem,是否可以删除左边的填充？

不幸的是,我试过：

let logoView = UIView(frame: CGRectMake(-15,44,44))
    logoView.backgroundColor = UIColor.darkGrayColor()

    var leftBarButtonItem: UIBarButtonItem = UIBarButtonItem(customView: logoView)

    self.navigationItem.setLeftBarButtonItem(leftBarButtonItem,animated: false)

但那不起作用. Ill表示此图片中显示的空间：

enter image description here

有任何想法吗？提前致谢.

这是Swift解决方案：

let logoView = UIView(frame: CGRectMake(0,44))
    logoView.backgroundColor = UIColor.darkGrayColor()

    let negativeSpacer = UIBarButtonItem.init(barButtonSystemItem: .FixedSpace,target: nil,action: nil)
    negativeSpacer.width = -20;

    let leftBarButtonItem: UIBarButtonItem = UIBarButtonItem(customView: logoView)

    self.navigationItem.leftBarButtonItems = [negativeSpacer,leftBarButtonItem]

解决方法

以下是删除自定义左按钮项左侧的填充的示例：

UIBarButtonItem *backButtonItem // Assume this exists,filled with our custom view

// Create a negative spacer to go to the left of our custom back button,// and pull it right to the edge:
UIBarButtonItem *negativeSpacer = [[UIBarButtonItem alloc] 
    initWithBarButtonSystemItem:UIBarButtonSystemItemFixedSpace 
    target:nil action:nil];
negativeSpacer.width = -5; 

// Note: We use 5 above b/c that's how many pixels of padding iOS seems to add

// Add the two buttons together on the left:
self.navigationItem.leftBarButtonItems = [NSArray 
    arrayWithObjects:negativeSpacer,backButtonItem,nil];

（编辑：李大同）

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