dyld:找不到符号:错误如何解决此问题

Question

我有以下代码(如下所示),我用它NSURLConnection来连接和解析响应字符串.但是我收到以下错误:

dyld: Symbol not found: _CFXMLNodeGetInfoPtr
  Referenced from: /System/Library/Frameworks/Security.framework/Versions/A/Security
  Expected in: /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator4.3.sdk/System/Library/Frameworks/CoreFoundation.framework/CoreFoundation
 in /System/Library/Frameworks/Security.framework/Versions/A/Security

我一直在努力解决这个问题而不能解决这个错误.

我已经导入了json.h和ASIHTTPRequest.h,所有这些文件仍然没有修复错误.

@implementation Websample1ViewController
- (void)viewDidLoad
{
    [super viewDidLoad];
    dataWebService = [[NSMutableData data] retain];
    NSMutableURLRequest *request = [[NSMutableURLRequest requestWithURL:[NSURL URLWithString:@"https://www.googleapis.com/customsearch/v1?key=AIzaSyDzl0Ozijg2C47iYfKgBWWkAbZE_wCJ-2U&cx=017576662512468239146:omuauf_lfve&q=lectures&callback=handleResponse"]]retain];    

    NSURLConnection *myConnection = [NSURLConnection connectionWithRequest:request delegate:self];
    [myConnection start];
}

- (void)connection:(NSURLConnection *)connection didReceiveResponse:(NSURLResponse *)response 
{
    [dataWebService setLength:0];
}

- (void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
    [dataWebService appendData:data];
}

- (void)connectionDidFinishLoading:(NSURLConnection *)connection 
{
    NSString *responseString = [[NSString alloc] initWithData:dataWebService encoding:NSUTF8StringEncoding];
    NSLog(@"Response: %@",responseString);
    [responseString release];
    [dataWebService release];
}

- (void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
{
    NSLog(@"Error during connection: %@", [error description]);
}

//class 2
@implementation WebJson
//parse JSON
- (void)requestCompleted:(ASIHTTPRequest *)request
{
    NSString *responseString = [request responseString];   
    NSDictionary *dictionary = [responseString JSONValue];
    NSDictionary *dictionaryReturn = (NSDictionary*) [dictionary objectForKey:@"request"];    
    NSString *total = (NSString*) [dictionaryReturn objectForKey:@"totalResults"];
    NSLog(@"totalResults: %@", total); 

    NSString *search = (NSString*) [dictionaryReturn objectForKey:@"searchTerms"];
    NSLog(@"searchTerms: %@", search);       

    int count = [[dictionaryReturn objectForKey:@"count"] intValue];
    NSLog(@"count: %d", count);
}

Answer 1

dyld错误是由链接缺失或错误引起的,而不是代码.

仔细检查您的框架链接,不要犹豫,删除/重新创建链接,照顾您从中获取框架的iOS版本.(通常使用Xcode提供的列表,不要浏览文件)

在你的情况下,我不会感到惊讶,链接/System/Library/Frameworks/Security.framework是一个错误,因为它看起来不像属于iOS SDK,看着它的路径......

我认为应该是这样的: /Developer/Platforms/iPhoneSimulator.platform/Developer/SDKs/iPhoneSimulator<Version>.sdk/System/Library/Frameworks/Security.framework

Answer 2

啊.我也打了这个.事实证明,在将框架添加到我的项目时,我不小心检查了框,将框架复制到我的本地目录.

从项目中删除框架.

然后添加框架,确保不复制文件.