WKWebView接入PDF.js过程记录处理总结

2023-01-18 10:08:28 浏览数 (1)

问题

最近用WKWebView读取PDF文件出现字体异常、电子图章不显示的问题，后来查找很多解决方案，最后决定用PDF.js的方式来实现

解决方案

  1. 参考https://www.jianshu.com/p/ded81b392d4d 写了demo能接入PDF，但部分字体在真机上还是接入异常，后来使用gulp generic-legacy生成generic-legacy稳定包之后，对Safari进行兼容后，终于能修复字体异常的问题
  2. PDF.js自带顶部工具类功能，如果想要去掉，只能通过修改viewer.css来实现，添加如下代码div.toolbar { display: none; } #outerContainer #mainContainer div.toolbar { display: none !important; /* hide PDF viewer toolbar */ opacity: 0.5 !important; } #outerContainer #mainContainer #viewerContainer { top: 0 !important; /* move doc up into empty bar space */ } NSString *viwerPath = [[NSBundle mainBundle] pathForResource:@"viewer" ofType:@"html" inDirectory:@"generic/web"]; NSString *urlStr = [NSString stringWithFormat:@"file://%@?file=%@#page=1",viwerPath,filePath]; urlStr = [urlStr stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSet URLQueryAllowedCharacterSet]]; NSURLRequest *request = [NSURLRequest requestWithURL:[NSURL URLWithString:urlStr]]; [self loadRequest:request];bytes方式动态加载读取:SBundle mainBundle] pathForResource:@"viewer" ofType:@"html" inDirectory:@"generic/web"]; NSURL * viwerPathURL = [NSURL fileURLWithPath:viwerPath]; NSURL * dir = viwerPathURL.URLByDeletingLastPathComponent; [self loadFileURL:viwerPathURL allowingReadAccessToURL:dir]; //动态加载的写法 dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.3 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{ NSData *data = [NSData dataWithContentsOfURL:filePath]; NSUInteger len = [data length]; uint8_t myArray[len]; [data getBytes:&myArray length:len]; NSMutableArray<NSString *> *bytes = [NSMutableArray array]; const uint8_t *rawBytes = data.bytes; for (NSUInteger i = 0; i < data.length; i ) { [bytes addObject:[NSString stringWithFormat:@"%d", (int)rawBytes[i]]]; } NSString *javaScriptArray = [bytes componentsJoinedByString:@","]; NSString *strForEvaluate = [NSString stringWithFormat: @"PDFViewerApplication.open(new Uint8Array([%@]));", javaScriptArray]; [self evaluateJavaScript:strForEvaluate completionHandler:^(id Result, NSError * _Nullable error) { if (error) { NSLog(@"This is error....%@",error.description); } else if(Result) { NSLog(@" %@",Result); } }]; });demo地址：https://github.com/freesan44/PDFJSReader
  3. 读取本地PDF文件的方式有两个，一个是初始化接入参数，一个是通过bytes方式动态加载读取 初始化接入参数:

参考：

https://github.com/mozilla/pdf.js

https://www.jianshu.com/p/fd5f248a8158

https://www.jianshu.com/p/ded81b392d4d

https://github.com/mozilla/pdf.js/issues/2784

https 网络安全 javascript github gitiOS Xcode

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