首页 \ 问答 \ 使用NSKeyedArchiver和NSData通过蓝牙发送UIImage(Using NSKeyedArchiver and NSData to send UIImage over bluetooth)

使用NSKeyedArchiver和NSData通过蓝牙发送UIImage(Using NSKeyedArchiver and NSData to send UIImage over bluetooth)

 我想知道是否有可能在使用NSKeyedArchiver将其编码为NSMutableData之后通过蓝牙发送UIImage。 这就是我的想法： 
 

NSMutableData *data = [[NSMutableData alloc] init];

NSKeyedArchiver *archiver = [[NSKeyedArchiver alloc] initForWritingWithMutableData:data];
[archiver encodeObject:[UIImage imageNamed:"test.png" forKey:kImageKey];

[archiver finishEncoding];


I was wondering if it is possible to send a UIImage over bluetooth after encoding it into a NSMutableData using NSKeyedArchiver. This is what I had in mind:
 

NSMutableData *data = [[NSMutableData alloc] init];

NSKeyedArchiver *archiver = [[NSKeyedArchiver alloc] initForWritingWithMutableData:data];
[archiver encodeObject:[UIImage imageNamed:"test.png" forKey:kImageKey];

[archiver finishEncoding];


原文：https://stackoverflow.com/questions/2200999
更新时间：2023-12-08 17:12

最满意答案

 这是一个错误。 它应该工作，它在许多其他情况下也是如此。 当我尝试它时，我确实看到抛出异常： 
 

org.eclipse.core.runtime.OperationCanceledException
at org.codehaus.groovy.eclipse.codeassist.processors.GroovyProposalTypeSearchRequestor.checkCancel(GroovyProposalTypeSearchRequestor.java:356)
at org.codehaus.groovy.eclipse.codeassist.processors.GroovyProposalTypeSearchRequestor.processAcceptedPackages(GroovyProposalTypeSearchRequestor.java:618)
at org.codehaus.groovy.eclipse.codeassist.processors.PackageCompletionProcessor.generateProposals(PackageCompletionProcessor.java:56)
at org.codehaus.groovy.eclipse.codeassist.requestor.GroovyCompletionProposalComputer.computeCompletionProposals(GroovyCompletionProposalComputer.java:162)
at org.grails.ide.eclipse.editor.gsp.adapter.CodeCompletionDelegate.codeComplete(CodeCompletionDelegate.java:71)
at org.codehaus.jdt.groovy.model.GroovyCompilationUnit.codeComplete(GroovyCompilationUnit.java:598)
at org.eclipse.jdt.internal.core.CompilationUnit.codeComplete(CompilationUnit.java:359)
at org.eclipse.jst.jsp.ui.internal.contentassist.JSPJavaCompletionProposalComputer.computeJavaCompletionProposals(JSPJavaCompletionProposalComputer.java:237)
at org.eclipse.jst.jsp.ui.internal.contentassist.JSPJavaCompletionProposalComputer.computeCompletionProposals(JSPJavaCompletionProposalComputer.java:114)
at org.eclipse.wst.sse.ui.internal.contentassist.CompletionProposalComputerDescriptor.computeCompletionProposals(CompletionProposalComputerDescriptor.java:284)
at org.eclipse.wst.sse.ui.internal.contentassist.CompletionProposalCategory.computeCompletionProposals(CompletionProposalCategory.java:290)
at org.eclipse.wst.sse.ui.contentassist.StructuredContentAssistProcessor.collectProposals(StructuredContentAssistProcessor.java:475)
at org.eclipse.wst.sse.ui.contentassist.StructuredContentAssistProcessor.computeCompletionProposals(StructuredContentAssistProcessor.java:254)
at org.eclipse.wst.sse.ui.internal.contentassist.CompoundContentAssistProcessor.computeCompletionProposals(CompoundContentAssistProcessor.java:127)
at org.eclipse.jface.text.contentassist.ContentAssistant.computeCompletionProposals(ContentAssistant.java:1839)
at org.eclipse.jface.text.contentassist.CompletionProposalPopup.computeProposals(CompletionProposalPopup.java:566)
at org.eclipse.jface.text.contentassist.CompletionProposalPopup.access$16(CompletionProposalPopup.java:563)
at org.eclipse.jface.text.contentassist.CompletionProposalPopup$2.run(CompletionProposalPopup.java:498)
...

 

 我必须看看这里发生了什么。 
 

 

 更新： 
 

 提出这个问题： https ： //issuetracker.springsource.com/browse/STS-3337 
 

 发现问题并推出修复程序。 将在下一个快照构建中提供。 

This is a bug. It should be working and it does in many other situations. When I try it, I do see that an exception is being thrown:
 

org.eclipse.core.runtime.OperationCanceledException
at org.codehaus.groovy.eclipse.codeassist.processors.GroovyProposalTypeSearchRequestor.checkCancel(GroovyProposalTypeSearchRequestor.java:356)
at org.codehaus.groovy.eclipse.codeassist.processors.GroovyProposalTypeSearchRequestor.processAcceptedPackages(GroovyProposalTypeSearchRequestor.java:618)
at org.codehaus.groovy.eclipse.codeassist.processors.PackageCompletionProcessor.generateProposals(PackageCompletionProcessor.java:56)
at org.codehaus.groovy.eclipse.codeassist.requestor.GroovyCompletionProposalComputer.computeCompletionProposals(GroovyCompletionProposalComputer.java:162)
at org.grails.ide.eclipse.editor.gsp.adapter.CodeCompletionDelegate.codeComplete(CodeCompletionDelegate.java:71)
at org.codehaus.jdt.groovy.model.GroovyCompilationUnit.codeComplete(GroovyCompilationUnit.java:598)
at org.eclipse.jdt.internal.core.CompilationUnit.codeComplete(CompilationUnit.java:359)
at org.eclipse.jst.jsp.ui.internal.contentassist.JSPJavaCompletionProposalComputer.computeJavaCompletionProposals(JSPJavaCompletionProposalComputer.java:237)
at org.eclipse.jst.jsp.ui.internal.contentassist.JSPJavaCompletionProposalComputer.computeCompletionProposals(JSPJavaCompletionProposalComputer.java:114)
at org.eclipse.wst.sse.ui.internal.contentassist.CompletionProposalComputerDescriptor.computeCompletionProposals(CompletionProposalComputerDescriptor.java:284)
at org.eclipse.wst.sse.ui.internal.contentassist.CompletionProposalCategory.computeCompletionProposals(CompletionProposalCategory.java:290)
at org.eclipse.wst.sse.ui.contentassist.StructuredContentAssistProcessor.collectProposals(StructuredContentAssistProcessor.java:475)
at org.eclipse.wst.sse.ui.contentassist.StructuredContentAssistProcessor.computeCompletionProposals(StructuredContentAssistProcessor.java:254)
at org.eclipse.wst.sse.ui.internal.contentassist.CompoundContentAssistProcessor.computeCompletionProposals(CompoundContentAssistProcessor.java:127)
at org.eclipse.jface.text.contentassist.ContentAssistant.computeCompletionProposals(ContentAssistant.java:1839)
at org.eclipse.jface.text.contentassist.CompletionProposalPopup.computeProposals(CompletionProposalPopup.java:566)
at org.eclipse.jface.text.contentassist.CompletionProposalPopup.access$16(CompletionProposalPopup.java:563)
at org.eclipse.jface.text.contentassist.CompletionProposalPopup$2.run(CompletionProposalPopup.java:498)
...

 

I'll have to see what is going on here.
 

 

UPDATE:
 

Raised this issue: https://issuetracker.springsource.com/browse/STS-3337
 

Found the problem and pushed a fix. Will be available in next snapshot build.

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