ios -如何处理NSURLConnectionDelegate？

Question

我正在尝试在给定链接的帮助下获取token。请通过此链接http://www.stevesaxon.me/posts/2011/window-external-notify-in-ios-uiwebview/

这里的_data是什么？该如何声明呢？

-(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
{
    if(_data)
    {
        [_data release];
        _data = nil;
    }
}

-(void)connection:(NSURLConnection *)connection didReceiveData:(NSData *)data
{
    if(!_data)

    {
        _data = [data mutableCopy];
    }
    else
    {
        [_data appendData:data];
    }
}

-(void)connectionDidFinishLoading:(NSURLConnection *)connection
{
    if(_data)
    {
        NSString* content = [[NSString alloc] initWithData:_data
                                                  encoding:NSUTF8StringEncoding];

        [_data release];
        _data = nil;

        // prepend the HTML with our custom JavaScript
        content = [ScriptNotify stringByAppendingString:content];

        [_webView loadHTMLString:content baseURL:_url];
    }
}

Answer 1

它的NSMutablData对象保存您从对Webservice的请求中接收到的响应数据

在.h文件的@interface中声明

NSMutableData *_data;

@property (nonatomic, retain) NSMutableData *_data;

和@synthesize _data;在.m文件中的@implementation行之后