doc22940 / urlembeddedview

URLEmbeddedView automatically caches the object that is confirmed the Open Graph Protocol.

URLEmbeddedView

Features

• Simple interface for fetching Open Graph Data
• Be able to display Open Graph Data
• Automatically caching Open Graph Data
• Automatically caching Open Graph Image
• Tap handleable
• Clearable image cache
• Clearable data cache
• Support Swift3.2 (until 0.11.x)
• Supprot Swift4.x (until 0.17.1)
• Support Swift5 (since 0.18.0)
• Support Carthage since 0.11.1
• Support tvOS since 0.16.0
• Custom implementation of OGData cache

Usage

To run the example project, clone the repo, and run carthage update from the Example directory first.

let embeddedView = URLEmbeddedView()
embeddedView.loadURL(urlString)

Layouts

• Default

• No Image

• No response

Customization

embeddedView.textProvider[.Title].font = .boldSystemFontOfSize(18)
embeddedView.textProvider[.Title].fontColor = .lightGrayColor()
embeddedView.textProvider[.Title].numberOfLines = 2
//You can use ".Title", ".Description", ".Domain" and ".NoDataTitle"

Data and Image Cache

You can get Open Graph Data with OGDataProvider.

OGDataProvider.shared.fetchOGData(urlString: String, completion: ((OpenGraph.Data, Error?) -> Void)? = nil) -> String?
OGDataProvider.shared.deleteOGData(urlString: String, completion: ((Error?) -> Void)? = nil)
OGDataProvider.shared.deleteOGData(_ ogData: OpenGraph.Data, completion: ((Error?) -> Void)? = nil)

You can configure time interval for next updating of OGData. Default is 10 days.

OGDataProvider.shared.updateInterval = 10.days

You can get UIImage with OGImageProvider.

OGImageProvider.shared.loadImage(urlString: String, completion: ((UIImage?, Error?) -> Void)? = nil) -> NSURLSessionDataTask?
OGImageProvider.shared.clearMemoryCache()
OGImageProvider.shared.clearAllCache()

Custom Data Cache implementation

Default cache feature is using Core Data. If you want to use other cache features, please implement cache manager with OGDataCacheManagerProtocol. For example, URLEmbeddedView has OGDataNoCacheManager that feature is not using cache. If you want to use that feature, you can use like this.

OGDataProvider.shared.cacheManager = OGDataNoCacheManager()

You can implement custom cache feature and use it like this.

class MemoryCacheManager: OGDataCacheManagerProtocol {
    // implementation of required methods
}

OGDataProvider.shared.cacheManager = MemoryCacheManager()

OpenGraph.Data Properties

public let imageUrl: URL?
public let pageDescription: String?
public let pageTitle: String?
public let pageType: String?
public let siteName: String?
public let sourceUrl: URL?
public let url: URL?

OpenGraphDataDownloader

You can only use download feature of OGData with OpenGraphDataDownloader like this.

let urlString = ...
OpenGraphDataDownloader.shared.fetchOGData(urlString: urlString) { result in
    switch result {
    case let .success(data, isExpired):
        // do something
    case let .failure(error, isExpired):
        // do something
    }
}

If you use OGDataProvider with OGDataNoCacheManager, it is almost same process.

OGDataProvider.shared.cacheManager = OGDataNoCacheManager()
let urlString = ...
OGDataProvider.shared.fetchOGData(urlString: urlString) { ogData, error in
    // do something
}

Installation

CocoaPods

URLEmbeddedView is available through CocoaPods. To install it, simply add the following line to your Podfile:

# Uncomment the next line to define a global platform for your project
# platform :ios, '8.0'

target 'Your Project Name' do
  # Comment the next line if you're not using Swift and don't want to use dynamic frameworks
  use_frameworks!

  # Pods for URLEmbeddedViewSample
  pod "URLEmbeddedView"
end

Carthage

If you’re using Carthage, simply add NoticeObserveKit to your Cartfile:

github "marty-suzuki/URLEmbeddedView"

Use in Objective-C

#import <URLEmbeddedView/URLEmbeddedView-Swift.h>

- (void)viewDidLoad {
    [super viewDidLoad];
    URLEmbeddedView *embeddedView = [[URLEmbeddedView alloc] init];
    [self.view addSubView:embeddedView];
    [embeddedView loadURL:@"https://github.com/" completion:nil];
}

- (void)setUpdateInterval {
  [OGDataProvider sharedInstance].updateInterval = [NSNumber days:10];
}

- (void)fetchOpenGraphData {
  [[OGDataProvider sharedInstance] fetchOGDataWithUrlString:self.textView.text
                                            completion:^(OpenGraphData *data, NSError *error) {
      NSLog(@"OpenGraphData = %@", data);
  }];
}

Here is Objective-C sample.

Special Thanks

• CryptoSwift is a greate Crypto related functions and helpers for Swift. (Created by @krzyzanowskim)

Requirements

• Xcode 10.2 or greater
• iOS 8.0 or greater
• tvOS 10.0 or greater
• UIKit
• CoreData
• CoreGraphics

Other

• MisterFusion - Swift DSL for AutoLayout
• NoticeObserveKit (type-safe NotificationCenter wrapper) is used in this sample.
• Android version is here. (Created by @kaelaela)

Author

Taiki Suzuki, [email protected]

License

URLEmbeddedView is available under the MIT license. See the LICENSE file for more info.