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youtube-ios-player-helper 在 YouTube-Player-iOS-Helper - GitHub 的推薦與評價
Lightweight helper library that allows iOS developers to add inline playback of YouTube videos through a WebView - GitHub ... ... <看更多>
youtube-ios-player-helper 在 Embed YouTube Videos in iOS Applications with the YouTube ... 的推薦與評價
The youtube-ios-player-helper is an open source library that helps you embed a
YouTube iframe player into an iOS application. The library creates a
WebView and a bridge between your application’s Objective-C code and the
YouTube player’s JavaScript code, thereby allowing the iOS application to control the
YouTube player. This article describes the steps to install the library and get started
using it from your iOS application.
Installation
This article assumes you have created a new Single View Application iOS project targeting
the latest version of iOS, and that you add the following files when creating the
project:
Main.storyboardViewController.hViewController.mYou can install the library via
CocoaPods or by copying the library
and source files from the
project’s GitHub page.
The library is available to install via CocoaPods. Alternatively, the library and source
files are available via the project’s GitHub page and can be copied into an existing
project.
Install the library via CocoaPods
If your project uses CocoaPods, add the line below to your Podfile to install the library.
In that line, replace x.y.z with the latest pod version, which will be
identified on the project’s GitHub page.
pod "youtube-ios-player-helper", "~> x.y.z"
At the command line prompt, type pod install to update your workspace with the
dependencies.
Tip: Remember that when using CocoaPods, you must open the .xcworkspace file
in Xcode, not the .xcodeproj file.
Check out the CocoaPods
tutorial to learn more.
Manually install the library
To install the helper library manually, either download the source via
GitHub’s download link or
clone the repository. Once you have a local copy of the code, follow these steps:
Open the sample project in Xcode or Finder.
Select YTPlayerView.h, YTPlayerView.m, and the
Assets folder. If you open the workspace in Xcode, these are available
under Pods -> Development Pods -> YouTube-Player-iOS-Helper and
Pods -> Development Pods -> YouTube-Player-iOS-Helper -> Resources. In the Finder,
these are available in the project's root directory in the Classes and
Assets directories.
Drag these files and folders into your project. Make sure the Copy items into
destination group’s folder option is checked. When dragging the Assets folder, make
sure that the Create Folder References for any added folders option is
checked.
The library should now be installed.
Add a
YTPlayerView via Interface Builder or the Storyboard To add a YTPlayerView via Interface Builder or the Storyboard:
Drag a UIView instance onto your View.
Select the Identity Inspector and change the class of the view to
YTPlayerView.
Open ViewController.h and add the following header:
#import “YTPlayerView.h” Also add the following property:
@property(nonatomic, strong) IBOutlet YTPlayerView *playerView;
In Interface Builder, create a connection from the View element that you defined in the
previous step to your View Controller's playerView property.
Now open ViewController.m and add the following code to the end of your
viewDidLoad method:
[self.playerView loadWithVideoId:@"M7lc1UVf-VE"];
Build and run your application. When the video thumbnail loads, tap the video thumbnail to
launch the fullscreen video player.
Control video playback
The ViewController::loadWithVideoId: method has a variant,
loadWithVideoId:playerVars:, that allows developers to pass additional player
variables to the view. These player variables correspond to the
player parameters in the
IFrame Player API. The playsinline parameter enables the video to play
directly in the view rather than playing fullscreen. When a video is playing inline, the
containing iOS application can programmatically control playback.
Replace the loadWithVideoId: call with this code:
NSDictionary *playerVars = @{
@"playsinline" : @1,
};
[self.playerView loadWithVideoId:@"M7lc1UVf-VE" playerVars:playerVars];
Open up the storyboard or Interface Builder. Drag two buttons onto your View, labeling them
Play and Stop. Open ViewController.h and add these methods, which
will be mapped to the buttons:
- (IBAction)playVideo:(id)sender;
- (IBAction)stopVideo:(id)sender;
Now open ViewController.m and define these two functions:
- (IBAction)playVideo:(id)sender {
[self.playerView playVideo];
}- (IBAction)stopVideo:(id)sender {
[self.playerView stopVideo];
}
Most of the IFrame Player API functions have Objective-C equivalents, though some of the
naming may differ slightly to more closely match Objective-C coding guidelines. Notable
exceptions are methods controlling the volume of the video, since these are controlled by
the phone hardware or with built in UIView instances designed for this purpose,
such as MPVolumeView.
Open your storyboard or Interface Builder and control-drag to connect the Play and
Stop buttons to the playVideo: and stopVideo: methods.
Now build and run the application. Once the video thumbnail loads, you should be able to
play and stop the video using native controls in addition to the player controls.
Handle player callbacks
It can be useful to programmatically handle playback events, such as playback state changes
and playback errors. In the JavaScript API, this is done with
event listeners.
In Objective-C,this is done with a
delegate.
The following code shows how to update the interface declaration in
ViewController.h so the class conforms to the delegate protocol. Change
ViewController.h’s interface declaration as follows:
@interface ViewController : UIViewController<YTPlayerViewDelegate>
YTPlayerViewDelegate is a protocol for handling playback events in the player.
To update ViewController.m to handle some of the events, you first need to set
the ViewController instance as the delegate of the YTPlayerView
instance. To make this change, add the following line to the viewDidLoad method
in ViewController.h.
self.playerView.delegate = self;
Now add the following method to ViewController.m:
- (void)playerView:(YTPlayerView *)playerView didChangeToState:(YTPlayerState)state {
switch (state) {
case kYTPlayerStatePlaying:
NSLog(@"Started playback");
break;
case kYTPlayerStatePaused:
NSLog(@"Paused playback");
break;
default:
break;
}
}
Build and run the application. Watch the log output in Xcode as the player state changes.
You should see updates when the video is played or stopped.
The library provides the constants that begin with the kYT* prefix for
convenience and readability. For a full list of these constants, look at
YTPlayerView.m.
Best practices and limitations
The library builds on top of the IFrame Player API by creating a WebView and
rendering the HTML and JavaScript required for a basic player. The library's goal is to be
as easy-to-use as possible, bundling methods that developers frequently have to write into a
package. There are a few limitations that should be noted:
The library does not support concurrent video playback in multiple
YTPlayerView instances. If your application has multipleYTPlayerView instances, a recommended best practice is to pause or stopplayback in any existing instances before starting playback in a different instance. In
the example application that ships with the project, the ViewControllers make use of
NSNotificationCenter to dispatch notifications that playback is about tobegin. Other ViewControllers are notified and will pause playback in their
YTPlayerView instances. Reuse your existing, loaded YTPlayerView instances when possible. When avideo needs to be changed in a View, don't create a new
UIView instance or anew
YTPlayerView instance, and don't call either loadVideoId: orloadPlaylistId:. Instead, use thecueVideoById:startSeconds: family of functions, which do notreload the
WebView. There is a noticeable delay when loading the entireIFrame player. This player cannot play private videos, but it can play
unlisted videos. Since this
library wraps the existing iframe player, the player's behavior should be nearly identical
to that of a player embedded on a webpage in a mobile browser.
Contributions
Since this is an open-source project, please submit fixes and improvements to the
master branch of the GitHub
project.
... <看更多>
youtube-ios-player-helper 在 YouTube-Player-iOS-Helper - GitHub 的推薦與評價
Lightweight helper library that allows iOS developers to add inline playback of YouTube videos through a WebView - GitHub ... ... <看更多>
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