当我尝试加载pdf并且不知道原因时,我得到了这个日志.
failed to find PDF header: `%PDF' not found.
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她的代码:
- (void)viewDidLoad
{
[webview loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:@"http://webdesign-schoenefeld.de/es-app/heute.pdf"]]];
NSLog(@"---------------pdfloading....,------------------------");
[webview addSubview:activityind];
timer = [NSTimer scheduledTimerWithTimeInterval:(1.0/2.0)
target:self
selector:@selector(loading)
userInfo:nil
repeats:YES];
[super viewDidLoad];
// Do any additional setup after loading the view, typically from a nib.
}
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我使用Xcode 6 Beta 5和iOS 8 beta 5.
谢谢你的帮助.
我正在使用AWS Cognito,在文档中我说我必须添加此功能.
但是我收到了这个错误:
泛型Objective-C类的扩展无法在运行时访问类的泛型参数
extension AWSTask {
public func continueWithExceptionCheckingBlock(completionBlock:@escaping (_ result: Any?, _ error: Error?) -> Void) {
self.continue({(task: AWSTask) -> Any? in
if let exception = task.exception {
print("Fatal exception: \(exception)")
kill(getpid(), SIGKILL);
}
let result: AnyObject? = task.result
let error: NSError? = task.error as NSError?
completionBlock(result, error)
return nil
})
}
}
Run Code Online (Sandbox Code Playgroud) 我试图归档我的应用程序并得到此错误:由于信号命令失败:分段错误:11
当我构建它时,一切都很顺利,也在真实设备上.归档时会发生这种情况.任何想法如何解决?
这是错误的一部分:
0 swift 0x000000010f79f3ad PrintStackTraceSignalHandler(void*) + 45
1 swift 0x000000010f79eb56 SignalHandler(int) + 790
2 libsystem_platform.dylib 0x00007fffc82d5bba _sigtramp + 26
3 libsystem_platform.dylib 0x0000000000000040 _sigtramp + 936551584
4 swift 0x000000010cae0de3 swift::CastOptimizer::optimizeUnconditionalCheckedCastAddrInst(swift::UnconditionalCheckedCastAddrInst*) + 1699
5 swift 0x000000010cb69d4d processFunction(swift::SILFunction&, bool, unsigned int) + 1917
6 swift 0x000000010cb70c9f (anonymous namespace)::ConstantPropagation::run() + 47
7 swift 0x000000010caff89e swift::SILPassManager::runOneIteration() + 5166
8 swift 0x000000010cb051f6 swift::runSILOptimizationPasses(swift::SILModule&) + 3462
9 swift 0x000000010c7ac0e2 performCompile(swift::CompilerInstance&, swift::CompilerInvocation&, llvm::ArrayRef<char const*>, int&, swift::FrontendObserver*) + 20114
10 swift 0x000000010c7a52b3 swift::performFrontend(llvm::ArrayRef<char const*>, char const*, void*, …Run Code Online (Sandbox Code Playgroud) 我有这个 PHP 代码:
$document = new DOMDocument();
$document->loadHTML( $html );
$xpath = new DomXPath($document);
$tables = $xpath->query("//*[contains(@class, 'info')]");
$tableDom = new DomDocument();
$tableDom->appendChild($tableDom->importNode($tables->item(0), true));
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如何检查 $tables 变量是否包含我们可以在 $tableDom 中使用的内容?
我试过:
if (!empty($tables)) {
echo("</br>not empty</br>");
} else {
echo("empty");
}
if (!$tablese) {
echo("empty</br>");
}
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但是它总是说它不是空的,所有的 HTML 都不包含带有类信息的表格。