react-native/React/Views/RCTWKWebView.m

#import "RCTWKWebView.h"

#import <WebKit/WebKit.h>

#import <React/RCTConvert.h>

#import "RCTAutoInsetsProtocol.h"

@interface RCTWKWebView () <WKUIDelegate>
@end

@implementation RCTWKWebView
{
  WKWebView *_webView;
}

- (void)dealloc
{

}

- (instancetype)initWithFrame:(CGRect)frame
{
  if ((self = [super initWithFrame:frame])) {
    super.backgroundColor = [UIColor clearColor];
    _webView = [[WKWebView alloc] initWithFrame:self.bounds];
    _webView.UIDelegate = self;
    [self addSubview:_webView];
  }
  return self;
}

- (void)setSource:(NSDictionary *)source
{
  if (![_source isEqualToDictionary:source]) {
    _source = [source copy];

    // Check for a static html source first
    NSString *html = [RCTConvert NSString:source[@"html"]];
    if (html) {
      NSURL *baseURL = [RCTConvert NSURL:source[@"baseUrl"]];
      if (!baseURL) {
        baseURL = [NSURL URLWithString:@"about:blank"];
      }
      [_webView loadHTMLString:html baseURL:baseURL];
      return;
    }

    NSURLRequest *request = [RCTConvert NSURLRequest:source];
    // Because of the way React works, as pages redirect, we actually end up
    // passing the redirect urls back here, so we ignore them if trying to load
    // the same url. We'll expose a call to 'reload' to allow a user to load
    // the existing page.
    if ([request.URL isEqual:_webView.URL]) {
      return;
    }
    if (!request.URL) {
      // Clear the webview
      [_webView loadHTMLString:@"" baseURL:nil];
      return;
    }
    [_webView loadRequest:request];
  }
}

- (void)layoutSubviews
{
  [super layoutSubviews];
  _webView.frame = self.bounds;
}

@end