如何以编程方式将 UIToolbar 添加到 iOS 应用程序？
声明：本页面是StackOverFlow热门问题的中英对照翻译，遵循CC BY-SA 4.0协议，如果您需要使用它，必须同样遵循CC BY-SA许可，注明原文地址和作者信息，同时你必须将它归于原作者（不是我）：StackOverFlow
原文地址: http://stackoverflow.com/questions/7711999/
Warning: these are provided under cc-by-sa 4.0 license. You are free to use/share it, But you must attribute it to the original authors (not me):
StackOverFlow
How to add a UIToolbar programmatically to an iOS app?
提问by Ger
Can't seem to find a tutorial which does as the question title describes. I'd like to understand just where the UIToolbar needs to be declared and how to get it onto my view layer.
似乎找不到按照问题标题描述的教程。我想了解 UIToolbar 需要在哪里声明以及如何将它放到我的视图层上。
回答by Ankit Jain
If you're using UINavigationControllerthen the toolbar comes with it by default.
如果您正在使用，UINavigationController则工具栏默认随附。
You can add it using following line of code:
您可以使用以下代码行添加它：
self.navigationController.toolbarHidden = NO;
And to add button to your Toolbar you can use following code:
并将按钮添加到您的工具栏，您可以使用以下代码：
UIBarButtonItem *flexibleItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:self action:nil];
UIBarButtonItem *item1 = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:nil];
UIBarButtonItem *item2 = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAction target:self action:nil];
flexibleItemis used to maintain proper distance between the two buttons that we have created above.
flexibleItem用于保持我们上面创建的两个按钮之间的适当距离。
Now you can add these three items in order to make them visible on your view.
现在您可以添加这三个项目以使它们在您的视图中可见。
NSArray *items = [NSArray arrayWithObjects:item1, flexibleItem, item2, nil];
self.toolbarItems = items;
I hope it works for you.
我希望这个对你有用。
回答by August Lilleaas
UIToolbaris a subclass of UIView, so the short answer to your question is: just like any other view.
UIToolbar是 的子类UIView，因此对您的问题的简短回答是：就像任何其他视图一样。
Specifically, this is an example of how to programmatically create a toolbar. The context in this snippet is viewDidLoadof a view controller.
具体来说，这是一个如何以编程方式创建工具栏的示例。此代码段中的上下文是viewDidLoad视图控制器。
UIToolbar *toolbar = [[UIToolbar alloc] init];
toolbar.frame = CGRectMake(0, 0, self.view.frame.size.width, 44);
NSMutableArray *items = [[NSMutableArray alloc] init];
[items addObject:[[[UIBarButtonItem alloc] initWith....] autorelease]];
[toolbar setItems:items animated:NO];
[items release];
[self.view addSubview:toolbar];
[toolbar release];
See UIToolbarand UIBarButtonItemdocumentation for details.
有关详细信息，请参阅UIToolbar和UIBarButtonItem文档。
回答by Hyman
iOS 11+ SWIFT 4 + Xcode 9 + Constraints
iOS 11+ SWIFT 4 + Xcode 9 + 约束
Works for both landscape + Portrait
适用于横向 + 纵向
override func viewDidLoad() {
super.viewDidLoad()
print(UIApplication.shared.statusBarFrame.height)//44 for iPhone x, 20 for other iPhones
navigationController?.navigationBar.barTintColor = .red
let toolBar = UIToolbar()
var items = [UIBarButtonItem]()
items.append(
UIBarButtonItem(barButtonSystemItem: .save, target: nil, action: nil)
)
items.append(
UIBarButtonItem(barButtonSystemItem: .add, target: self, action: #selector(tapsOnAdd))
)
toolBar.setItems(items, animated: true)
toolBar.tintColor = .red
view.addSubview(toolBar)
toolBar.translatesAutoresizingMaskIntoConstraints = false
if #available(iOS 11.0, *) {
let guide = self.view.safeAreaLayoutGuide
toolBar.trailingAnchor.constraint(equalTo: guide.trailingAnchor).isActive = true
toolBar.leadingAnchor.constraint(equalTo: guide.leadingAnchor).isActive = true
toolBar.bottomAnchor.constraint(equalTo: guide.bottomAnchor).isActive = true
toolBar.heightAnchor.constraint(equalToConstant: 44).isActive = true
}
else {
NSLayoutConstraint(item: toolBar, attribute: .bottom, relatedBy: .equal, toItem: view, attribute: .bottom, multiplier: 1.0, constant: 0).isActive = true
NSLayoutConstraint(item: toolBar, attribute: .leading, relatedBy: .equal, toItem: view, attribute: .leading, multiplier: 1.0, constant: 0).isActive = true
NSLayoutConstraint(item: toolBar, attribute: .trailing, relatedBy: .equal, toItem: view, attribute: .trailing, multiplier: 1.0, constant: 0).isActive = true
toolBar.heightAnchor.constraint(equalToConstant: 44).isActive = true
}
}
回答by Hardik Thakkar
To show the Toolbar at the bottom with space between two button on at Left Side , and another at Right side
在底部显示工具栏，左侧的两个按钮之间有空格，右侧的另一个按钮之间有空格
-(void)showToolBar
{
CGRect frame, remain;
CGRectDivide(self.view.bounds, &frame, &remain, 44, CGRectMaxYEdge);
UIToolbar *toolbar = [[UIToolbar alloc] initWithFrame:frame];
UIBarButtonItem *button1 = [[UIBarButtonItem alloc] initWithTitle:@"Send" style:UIBarButtonItemStyleDone target:self action:nil];
UIBarButtonItem *spacer = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:self action:nil];
UIBarButtonItem *button2=[[UIBarButtonItem alloc]initWithTitle:@"Cancel" style:UIBarButtonItemStyleDone target:self action:nil];
[toolbar setItems:[[NSArray alloc] initWithObjects:button1,spacer,button2,nil]];
[toolbar setAutoresizingMask:UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleTopMargin];
[self.view addSubview:toolbar];
}
Note: To Give space between to Button we add line as below
注意：为了给按钮之间留出空间，我们添加如下行
UIBarButtonItem *spacer = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:self action:nil];
and add spacer to the
并将垫片添加到
[toolbar setItems:[[NSArray alloc] initWithObjects:button1,spacer,button2,nil]];
回答by kapil
This is how you implement a UIToolbarin your app.
这就是您UIToolbar在应用程序中实现 a的方式。
// declare frame of uitoolbar
UIToolBar *lotoolbar = [[UIToolbar alloc] initWithFrame:CGRectMake(0, 170, 320, 30)];
[lotoolbar setTintColor:[UIColor blackColor]];
UIBarButtonItem *button1 = [[UIBarButtonItem alloc] initWithTitle:@"DATE" style:UIBarButtonItemStyleDone target:self action:@selector(dateToolbardoneButtonAction)];
UIBarButtonItem *button2=[[UIBarButtonItem alloc]initWithTitle:@"TIME" style:UIBarButtonItemStyleDone target:self action:@selector(timeToolbarbuttonAction)];
[lotoolbar setItems:[[NSArray alloc] initWithObjects:button1, nil];
[lotoolbar setItems:[[NSArray alloc] initWithObjects:button2, nil];
[mainUIview addSubview:lotoolbar];
You should also have to implement the following delegate methods:
您还应该实现以下委托方法：
- (BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text
{
}
- (void)textViewDidChange:(UITextView *)textView{
NSLog(@"textViewDidChange:");
}
- (void)textViewDidChangeSelection:(UITextView *)textView{
NSLog(@"textViewDidChangeSelection:");
}
- (BOOL)textViewShouldBeginEditing:(UITextView *)textView
{
[lotextview setText:@""];
NSLog(@"textViewShouldBeginEditing:");
return YES;
}
回答by Rajesh Loganathan
Try this simple Method:
试试这个简单的方法：
UIToolbar *toolbar = [[UIToolbar alloc] init];
toolbar.frame = CGRectMake(0, 0, 300, 44);
UIBarButtonItem *button1 = [[UIBarButtonItem alloc] initWithTitle:@"Send" style:UIBarButtonItemStyleDone target:self action:@selector(sendAction)];
UIBarButtonItem *button2=[[UIBarButtonItem alloc]initWithTitle:@"Cancel" style:UIBarButtonItemStyleDone target:self action:@selector(cancelAction)];
[toolbar setItems:[[NSArray alloc] initWithObjects:button1,button2, nil]];
[self.view addSubview:toolbar];
