Changing the height of UIToolbar in iOS 7
I am trying to change the height of my UIToolbar in a new iOS 7 project but I am not able to.
I am using a UINavigationController to manage a couple of UIViewController. I tried setting the frame for the toolbar via the navigation controller but alas, the toolbar property is read-only.
I looked at "Is there a way to change the height of a UIToolbar?" but that did not work.
I tried subclassing UIToolbar, forcing a custom height and setting the right class in the Storyboard but that did not work neither, height keeps on being 44px.
I thought about auto-layout could not set any constraint on the size of the toolbar, every field is disabled.
I can set a custom view in a UIBarButtonItem with a bigger height than the toolbar. The big item will be correctly rendered but it will overflow from the toolbar.
This is the best I could do: screenshot
Is it actually possible to change the height of the UIToolbar in iOS 7? Or am I supposed to create a bunch of custom items to mimic it?
Following the @Antoine suggestion using sizeThatFits , here is my Toolbar subclass with an height of 64:
import UIKit
class Toolbar: UIToolbar {
override func layoutSubviews() {
super.layoutSubviews()
frame.size.height = 64
}
override func sizeThatFits(size: CGSize) -> CGSize {
var size = super.sizeThatFits(size)
size.height = 64
return size
}
}
Then, when initializing the navigation controller, I say it should use that class:
let navigationController = UINavigationController(navigationBarClass: nil, toolbarClass: Toolbar.self)
我发现设置工具栏高度的最简单方法是使用高度约束，如下所示：
let toolbarCustomHeight: CGFloat = 64
toolbar.heightAnchor.constraintEqualToConstant(toolbarCustomHeight).active = true
我通过UIToolbar并粘贴以下代码解决了这个问题：
override func layoutSubviews() {
super.layoutSubviews()
var frame = self.bounds
frame.size.height = 52
self.frame = frame
}
override func sizeThatFits(size: CGSize) -> CGSize {
var size = super.sizeThatFits(size)
size.height = 52
return size
}