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https://github.com/TimOliver/TONavigationBar
Replicating the 'clear' navigation bar style of the iOS 12 Apple TV app.
https://github.com/TimOliver/TONavigationBar
Last synced: 7 days ago
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Replicating the 'clear' navigation bar style of the iOS 12 Apple TV app.
- Host: GitHub
- URL: https://github.com/TimOliver/TONavigationBar
- Owner: TimOliver
- License: mit
- Created: 2018-01-31T07:20:27.000Z (almost 7 years ago)
- Default Branch: main
- Last Pushed: 2022-11-29T13:12:19.000Z (about 2 years ago)
- Last Synced: 2024-05-09T19:58:29.723Z (7 months ago)
- Language: Objective-C
- Homepage:
- Size: 1.97 MB
- Stars: 250
- Watchers: 11
- Forks: 24
- Open Issues: 4
-
Metadata Files:
- Readme: README.md
- Funding: .github/FUNDING.yml
- License: LICENSE
Awesome Lists containing this project
- awesome-ios - TONavigationBar - A simple subclass that adds the ability to set the navigation bar background to 'clear' and gradually transition it visibly back in, similar to the effect in the iOS Music app. (UI / Navigation Bar)
- awesome-ios-star - TONavigationBar - A simple subclass that adds the ability to set the navigation bar background to 'clear' and gradually transition it visibly back in, similar to the effect in the iOS Music app. (UI / Navigation Bar)
README
# TONavigationBar
[](http://cocoadocs.org/docsets/TOCropViewController)
[](https://raw.githubusercontent.com/TimOliver/TONavigationBar/main/LICENSE)
[](http://cocoadocs.org/docsets/TONavigationBar)
`TONavigationBar` is an open-source subclass of `UINavigationBar` that adds the ability to set the background content of the navigation bar to transparent, and then gradually bring it back in as the user scrolls through the page.
Apple uses this effect in their 'modern' style iOS apps (Music, TV, App Store) for any content deemed 'notable'. Unfortunately, while it seems like a trivial thing to be able to do, none of the APIs necessary to reconfigure a `UINavigationBar` to be transparent in that way exist. `TONavigationBar` internally re-implements a variety of the `UINavigationBar` functionality in order to make this possible.
## Features
* Fully integrates into `UINavigationController`.
* Participates in `UINavigationController`'s 'swipe-to-go-back' gesture.
* Supports light and dark themed apps.
* Features an animation to restore to the normal `UINavigationBar` appearance.
* A target `UIScrollView` may be specified in order to avoid having to manually pass information to the bar.
* Library also features `TOHeaderImageView`, a header view that may be used as the banner in scroll views.
## System Requirements
iOS 11.0 or above
## Installation
#### As a CocoaPods Dependency
##### Objective-C
Add the following to your Podfile:
``` ruby
pod 'TONavigationBar'
```
#### Manual Installation
All of the necessary source files are in the `TONavigationBar`, folder. Simply copy that folder to your Xcode project and import all of the files in it.
## Examples
`TONavigationBar` has been designed to be as hands-off as possible. It integrates with `UINavigationController` and only needs to be interacted with when changing the visibility of the background content.
### Basic Implementation
#### Integrating with `UINavigationController`
```objc
#import "TONavigationBar.h"
UINavigationController *navigationController = [[UINavigationController alloc] initWithNavigationBarClass:[TONavigationBar class] toolbarClass:nil];
```
#### Showing and Hiding the Background Content
```objc
#import "TONavigationBar.h"
@implementation MyViewController // A child of the `UINavigationController` stack
- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
[self.navigationController.to_navigationBar setBackgroundHidden:YES animated:animated forViewController:self];
[self.navigationController.to_navigationBar setTargetScrollView:self.tableView minimumOffset:200.0f]; // 200.0f is the height of the header view
}
@end
```
#### Creating and Configuring a Header View
```objc
#import "TOHeaderImageView.h"
@interface MyTableViewController ()
@property (nonatomic, strong) TOHeaderImageView *headerView;
@end
@implementation MyTableViewController
- (void)viewDidLoad {
[super viewDidLoad];
self.headerView = [[TOHeaderImageView alloc] initWithImage:[UIImage imageNamed:@"MyPicture.jpg"] height:200.0f];
self.headerView.shadowHidden = NO;
self.tableView.tableHeaderView = self.headerView;
}
- (void)scrollViewDidScroll:(UIScrollView *)scrollView
{
self.headerView.scrollOffset = scrollView.contentOffset.y;
}
@end
```
## Architecture of `TONavigationBar`
In order to modify `UINavigationBar` to the same style Apple uses, a few things need to happen:
* The background view, including the separator line need to be removed.
* The title label in the center needs to be removed.
* The tint color needs to be set to white (To make the buttons white).
* The bar style needs to be set to `UIBarStyleBlack` (Which makes `UINavigationController` change the status bar style to white.)
Changing the tint color and bar style are trivial, however there are no public APIs provided by Apple to easily control the alpha of just the background views, or the title label.
The way `TONavigationBar` solves this is as follows:
* The official background views are removed by using `[UINavigationBar setBackgroundImage:[[UIImage alloc] init]` and then a wholly custom set are put in their place. This also means transitioning it back while scrolling is possible.
* The title label is controlled by manually traversing `UINavigationBar`'s internal views, finding the right one, and then overriding its presentation by Apple's code.
## Is this App Store safe?
Yes. It should be. The only slightly dubious thing this view does is that it traverses some internal Apple views to find the title label. However no private APIs are called in the process, so that should be no problem.
That being said, internal view traversal is always a terrible way to go, and this library MAY break in future versions of iOS without maintenance. Thankfully, it's set up so if it does break, the absolute worst thing that can happen is that the title label will always be visible.
## Credits
`TONavigationBar` was originally created by [Tim Oliver](http://twitter.com/TimOliverAU) as a component for [iComics](http://icomics.co), a comic reader app for iOS.
[Firewatch Wallpaper](http://blog.camposanto.com/post/138965082204/firewatch-launch-wallpaper-when-we-redid-the) by Campo Santo and is used for illustrative purposes. [Firewatch](http://store.steampowered.com/app/383870/Firewatch/) is available on Steam.
iOS Device mockups used in the screenshot created by [Pixeden](http://www.pixeden.com).
## License
`TONavigationBar` is licensed under the MIT License, please see the [LICENSE](LICENSE) file. 