标签:sso java htm work 成功 move 目录 cat for
当使用loadRequest来读取本地的HTML时,WKWebView是无法读取成功的,后台会出现如下的提示:
Could not create a sandbox extension for /
原因是WKWebView是不允许通过loadRequest的方法来加载本地根目录的HTML文件。
而在iOS9的SDK中加入了以下方法来加载本地的HTML文件:[WKWebView loadFileURL:allowingReadAccessToURL:]
但是在iOS9以下的版本是没提供这个便利的方法的。以下为解决方案的思路,就是在iOS9以下版本时,先将本地HTML文件的数据copy到tmp目录中,然后再使用loadRequest来加载。但是如果在HTML中加入了其他资源文件,例如js,css,image等必须一同copy到temp中。这个是最蛋疼的事情了。
1.Objective-C:
//将文件copy到tmp目录
- (NSURL *)fileURLForBuggyWKWebView8:(NSURL *)fileURL {
NSError *error = nil;
if (!fileURL.fileURL || ![fileURL checkResourceIsReachableAndReturnError:&error]) {
return nil;
}
// Create "/temp/www" directory
NSFileManager *fileManager= [NSFileManager defaultManager];
NSURL *temDirURL = [[NSURL fileURLWithPath:NSTemporaryDirectory()] URLByAppendingPathComponent:@"www"];
[fileManager createDirectoryAtURL:temDirURL withIntermediateDirectories:YES attributes:nil error:&error];
NSURL *dstURL = [temDirURL URLByAppendingPathComponent:fileURL.lastPathComponent];
// Now copy given file to the temp directory
[fileManager removeItemAtURL:dstURL error:&error];
[fileManager copyItemAtURL:fileURL toURL:dstURL error:&error];
// Files in "/temp/www" load flawlesly :)
return dstURL;
}
//调用逻辑
NSString *path = [[NSBundle mainBundle] pathForResource:@"indexoff" ofType:@"html"];
if(path){
if ([[UIDevice currentDevice].systemVersion floatValue] >= 9.0) {
// iOS9. One year later things are OK.
NSURL *fileURL = [NSURL fileURLWithPath:path];
[self.webView loadFileURL:fileURL allowingReadAccessToURL:fileURL];
} else {
// iOS8. Things can be workaround-ed
// Brave people can do just this
// fileURL = try! pathForBuggyWKWebView8(fileURL)
// webView.loadRequest(NSURLRequest(URL: fileURL))
NSURL *fileURL = [self.fileHelper fileURLForBuggyWKWebView8:[NSURL fileURLWithPath:path]];
NSURLRequest *request = [NSURLRequest requestWithURL:fileURL];
[self.webView loadRequest:request];
}
}
2.Swift
//将文件copy到tmp目录
func fileURLForBuggyWKWebView8(fileURL: NSURL) throws -> NSURL {
// Some safety checks
var error:NSError? = nil;
if (!fileURL.fileURL || !fileURL.checkResourceIsReachableAndReturnError(&error)) {
throw error ?? NSError(
domain: "BuggyWKWebViewDomain",
code: 1001,
userInfo: [NSLocalizedDescriptionKey: NSLocalizedString("URL must be a file URL.", comment:"")])
}
// Create "/temp/www" directory
let fm = NSFileManager.defaultManager()
let tmpDirURL = NSURL.fileURLWithPath(NSTemporaryDirectory()).URLByAppendingPathComponent("www")
try! fm.createDirectoryAtURL(tmpDirURL, withIntermediateDirectories: true, attributes: nil)
// Now copy given file to the temp directory
let dstURL = tmpDirURL.URLByAppendingPathComponent(fileURL.lastPathComponent!)
let _ = try? fileMgr.removeItemAtURL(dstURL)
try! fm.copyItemAtURL(fileURL, toURL: dstURL)
// Files in "/temp/www" load flawlesly :)
return dstURL
}
//方法调用
var filePath = NSBundle.mainBundle().pathForResource("file", ofType: "pdf")
if #available(iOS 9.0, *) {
// iOS9. One year later things are OK.
webView.loadFileURL(fileURL, allowingReadAccessToURL: fileURL)
} else {
// iOS8. Things can be workaround-ed
// Brave people can do just this
// fileURL = try! pathForBuggyWKWebView8(fileURL)
// webView.loadRequest(NSURLRequest(URL: fileURL))
do {
fileURL = try fileURLForBuggyWKWebView8(fileURL)
webView.loadRequest(NSURLRequest(URL: fileURL))
} catch let error as NSError {
print("Error: " + error.debugDescription)
}
}
特别提醒一点,在使用以下delegate的方法时
- (void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler
需执行decisionHandler的block。
例如:
- (void)webView:(WKWebView *)webView decidePolicyForNavigationAction:(WKNavigationAction *)navigationAction decisionHandler:(void (^)(WKNavigationActionPolicy))decisionHandler {
NSURLRequest *request = navigationAction.request;
WMPageActionType actionType = ActionTypeNone;
WKNavigationActionPolicy actionPolicy = WKNavigationActionPolicyAllow;
if([request.URL.absoluteString hasPrefix:OC_CLOSE_REQUEST]){
actionType = ActionTypeClose;
actionPolicy = WKNavigationActionPolicyCancel;
}
if(self.actionDelegate && [self.actionDelegate respondsToSelector:@selector(webView:action:type:)]) {
[self.actionDelegate webView:webView action:navigationAction type:actionType];
}
//这句是必须加上的,不然会异常
decisionHandler(actionPolicy);
}
3.WKWebView-JS执行方法
WKWebView JS执行方法与UIWebView不一样了。
- (void)evaluateJavaScript:(NSString *)javaScriptString completionHandler:(void (^)(id, NSError *))completionHandler;
completionHandler 拥有两个参数,一个是返回错误,一个可以返回执行脚本后的返回值
标签:sso java htm work 成功 move 目录 cat for
原文地址:http://www.cnblogs.com/duzhaoquan/p/6016757.html