objective-c 在 iOS8 中使用 UISplitViewController 隐藏主视图控制器
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Hiding the master view controller with UISplitViewController in iOS8
提问by ColinE
I have an iOS7 application, which was based on the Xcode master-detail template, that I am porting to iOS8. One area that has changed a lot is the UISplitViewController.
我有一个 iOS7 应用程序，它基于 Xcode 主从模板，我正在移植到 iOS8。发生了很大变化的一个领域是UISplitViewController.
When in portrait mode, if the user taps on the detail view controller, the master view controller is dismissed:
在纵向模式下，如果用户点击详细视图控制器，主视图控制器将被关闭：
I would also like to be able to programmatically hide the master view controller if the user taps on a row.
如果用户点击一行，我还希望能够以编程方式隐藏主视图控制器。
In iOS 7, the master view controller was displayed as a pop-over, and could be hidden as follows:
在 iOS 7 中，主视图控制器显示为弹出窗口，可以如下隐藏：
[self.masterPopoverController dismissPopoverAnimated:YES];
With iOS 8, the master is no longer a popover, so the above technique will not work.
在 iOS 8 中，master 不再是 popover，因此上述技术将不起作用。
I've tried to dismiss the master view controller:
我试图关闭主视图控制器：
self.dismissViewControllerAnimated(true, completion: nil)
Or tell the split view controller to display the details view controller:
或者告诉拆分视图控制器显示详细信息视图控制器：
self.splitViewController?.showDetailViewController(bookViewController!, sender: self)
But nothing has worked so far. Any ideas?
但到目前为止没有任何效果。有任何想法吗？
回答by phatmann
Extend the UISplitViewController as follows:
扩展 UISplitViewController 如下：
extension UISplitViewController {
func toggleMasterView() {
let barButtonItem = self.displayModeButtonItem()
UIApplication.sharedApplication().sendAction(barButtonItem.action, to: barButtonItem.target, from: nil, forEvent: nil)
}
}
In didSelectRowAtIndexPathor prepareForSegue, do the following:
在didSelectRowAtIndexPath或 中prepareForSegue，执行以下操作：
self.splitViewController?.toggleMasterView()
This will smoothly slide the master view out of the way.
这将平滑地将主视图滑开。
I got the idea of using the displayModeButtonItem() from this postand I am simulating a tap on it per this post.
我使用displayModeButtonItem（）从想法这篇文章，我每次上模拟水龙头这个职位。
I am not really happy with this solution, since it seems like a hack. But it works well and there seems to be no alternative yet.
我对这个解决方案并不满意，因为它看起来像是一个黑客。但它运作良好，似乎还没有其他选择。
回答by Vinay Jain
Use preferredDisplayMode. In didSelectRowAtIndexPathor prepareForSegue:
使用preferredDisplayMode. 在didSelectRowAtIndexPath或prepareForSegue：
self.splitViewController?.preferredDisplayMode = .PrimaryHidden
self.splitViewController?.preferredDisplayMode = .Automatic
Unfortunately the master view abruptly disappears instead of sliding away, despite the documentation stating:
不幸的是，主视图突然消失而不是滑开，尽管文档说明：
If changing the value of this property leads to an actual change in the current display mode, the split view controller animates the resulting change.
如果更改此属性的值导致当前显示模式的实际更改，则拆分视图控制器会为结果更改设置动画。
Hopefully there is a better way to do this that actually animates the change.
希望有一种更好的方法来做到这一点，实际上可以使更改动画化。
回答by Imanou Petit
I was able to have the desired behavior in a Xcode 6.3 Master-Detail Application (universal) projectby adding the following code in the MasterViewController's - prepareForSegue:sender:method:
通过在's方法中添加以下代码，我能够在Xcode 6.3 Master-Detail Application（通用）项目中获得所需的行为：MasterViewController- prepareForSegue:sender:
if view.traitCollection.userInterfaceIdiom == .Pad && splitViewController?.displayMode == .PrimaryOverlay {
let animations: () -> Void = {
self.splitViewController?.preferredDisplayMode = .PrimaryHidden
}
let completion: Bool -> Void = { _ in
self.splitViewController?.preferredDisplayMode = .Automatic
}
UIView.animateWithDuration(0.3, animations: animations, completion: completion)
}
The complete - prepareForSegue:sender:implementation should look like this:
完整的- prepareForSegue:sender:实现应该是这样的：
override func prepareForSegue(segue: UIStoryboardSegue, sender: AnyObject?) {
if segue.identifier == "showDetail" {
if let indexPath = self.tableView.indexPathForSelectedRow() {
let object = objects[indexPath.row] as! NSDate
let controller = (segue.destinationViewController as! UINavigationController).topViewController as! DetailViewController
controller.detailItem = object
controller.navigationItem.leftBarButtonItem = self.splitViewController?.displayModeButtonItem()
controller.navigationItem.leftItemsSupplementBackButton = true
if view.traitCollection.userInterfaceIdiom == .Pad && splitViewController?.displayMode == .PrimaryOverlay {
let animations: () -> Void = {
self.splitViewController?.preferredDisplayMode = .PrimaryHidden
}
let completion: Bool -> Void = { _ in
self.splitViewController?.preferredDisplayMode = .Automatic
}
UIView.animateWithDuration(0.3, animations: animations, completion: completion)
}
}
}
}
Using traitCollectionmay also be an alternative/supplement to displayModein some projects. For example, the following code also works for a Xcode 6.3 Master-Detail Application (universal) project:
在某些项目中，使用traitCollection也可能是替代/补充displayMode。例如，以下代码也适用于Xcode 6.3 Master-Detail Application (universal) 项目：
let traits = view.traitCollection
if traits.userInterfaceIdiom == .Pad && traits.horizontalSizeClass == .Regular {
let animations: () -> Void = {
self.splitViewController?.preferredDisplayMode = .PrimaryHidden
}
let completion: Bool -> Void = { _ in
self.splitViewController?.preferredDisplayMode = .Automatic
}
UIView.animateWithDuration(0.3, animations: animations, completion: completion)
}
回答by jithinroy
The code below hides the master view with animation
下面的代码隐藏了带有动画的主视图
UIView.animateWithDuration(0.5) { () -> Void in
self.splitViewController?.preferredDisplayMode = .PrimaryHidden
}
回答by Santiago Bendavid
Just improving a little bit the answers listed here already, the following code is working properly for me, and it also handles the animation smoothly:
只是稍微改进了这里列出的答案，以下代码对我来说正常工作，并且它也可以顺利处理动画：
extension UISplitViewController {
func toggleMasterView() {
var nextDisplayMode: UISplitViewControllerDisplayMode
switch(self.preferredDisplayMode){
case .PrimaryHidden:
nextDisplayMode = .AllVisible
default:
nextDisplayMode = .PrimaryHidden
}
UIView.animateWithDuration(0.5) { () -> Void in
self.preferredDisplayMode = nextDisplayMode
}
}
}
and then, as mentioned, you just use the extended function anywhere in your View controllers
然后，如上所述，您只需在视图控制器中的任何位置使用扩展功能
self.splitViewController?.toggleMasterView()
回答by Andy G
Swift 4 update:
斯威夫特 4 更新：
Insert it into prepare(for segue: ...
将其插入准备（用于segue：...
if splitViewController?.displayMode == .primaryOverlay {
let animations: () -> Void = {
self.splitViewController?.preferredDisplayMode = .primaryHidden
}
let completion: (Bool) -> Void = { _ in
self.splitViewController?.preferredDisplayMode = .automatic
}
UIView.animate(withDuration: 0.3, animations: animations, completion: completion)
}
回答by Tim
Modifying the answers above this is all I needed in a method of my detail view controller that configured the view:
在配置视图的详细视图控制器的方法中，我只需要修改上面的答案：
[self.splitViewController setPreferredDisplayMode:UISplitViewControllerDisplayModePrimaryHidden];
Of course it lacks the grace of animation.
当然，它缺乏动画的优雅。
回答by daren
try
尝试
let svc = self.splitViewController svc.preferredDisplayMode = UISplitViewControllerDisplayMode.PrimaryHidden
回答by coder1087
for iPad add Menu button like this
为 iPad 添加这样的菜单按钮
UIBarButtonItem *menuButtonItem = [[UIBarButtonItem alloc] initWithImage:[UIImage imageNamed:@"burger_menu"]
style:UIBarButtonItemStylePlain
target:self.splitViewController.displayModeButtonItem.target
action:self.splitViewController.displayModeButtonItem.action];
[self.navigationItem setLeftBarButtonItem:menuButtonItem];
This work great with both landscape and portrait mode. To programmatically close the popover vc you just need to force the button action like this
这适用于横向和纵向模式。要以编程方式关闭 popover vc，您只需要像这样强制按钮操作
[self.splitViewController.displayModeButtonItem.target performSelector:appDelegate.splitViewController.displayModeButtonItem.action];
回答by Alexander Khitev
My solution in the Swift 1.2
我在 Swift 1.2 中的解决方案
override func tableView(tableView: UITableView, didSelectRowAtIndexPath indexPath: NSIndexPath){
var screen = UIScreen.mainScreen().currentMode?.size.height
if (UIDevice.currentDevice().userInterfaceIdiom == UIUserInterfaceIdiom.Pad) || screen >= 2000 && UIDevice.currentDevice().orientation.isLandscape == true && (UIDevice.currentDevice().userInterfaceIdiom == .Phone){
performSegueWithIdentifier("showDetailParse", sender: nil)
self.splitViewController?.preferredDisplayMode = UISplitViewControllerDisplayMode.PrimaryHidden
} else if (UIDevice.currentDevice().userInterfaceIdiom == .Phone) {
performSegueWithIdentifier("showParse", sender: nil)
}
}
