在我的计划，我有一个收集信息的NSMutableData变量http://www.nhara.org/scored_races-2013.htm 。 经过约第三次它获取信息从网站，当它含有90810个字节，它要么消失或变成零，因为如果我打印一个的NSString，它是空的。 下面是代码
- (void)viewWillAppear:(BOOL)animated
{
// Create a new data container for the stuff that comes back from the service
xmlData = [[NSMutableData alloc] initWithCapacity:180000];
[self fetchEntries];
[super viewWillAppear:animated];
}
- (void)fetchEntries
{
// Construct a URL that will ask the service for what you want
NSURL *url = [NSURL URLWithString: @"http://www.nhara.org/scored_races-2013.htm"];//
// Put that URL into an NSURLRequest
NSURLRequest *req = [NSURLRequest requestWithURL:url];
// Create a connection that will exchange this request for data from the URL
connection = [[NSURLConnection alloc] initWithRequest:req delegate:self startImmediately:YES];
}
- (void)connection:(NSURLConnection *)conn didReceiveData:(NSData *)data
{
// Add the incoming chunk of data to the container we are keeping
// The data always comes in the correct order
[xmlData appendData:data];
NSLog(@"%@",xmlData);
NSString *xmlCheck = [[[NSString alloc] initWithData:xmlData encoding:NSUTF8StringEncoding]autorelease];
NSLog(@"xmlCheck = %@", xmlCheck);
}
-(void)connection:(NSURLConnection *)connection didFailWithError:(NSError *)error
{
NSLog(@"error= %@",error);
}
- (void)connectionDidFinishLoading:(NSURLConnection *)conn {
// We are just checking to make sure we are getting the XML
NSString *xmlCheck = [[[NSString alloc] initWithData:xmlData encoding:NSUTF8StringEncoding] autorelease];
NSLog(@"xmlCheck2 = %@", xmlCheck);
}
什么混淆我最深的是，我的NSMutableData存储数据，但随后失去它虽然号称有相同的字节数。
有没有一种约束到NSMutableData的大小或者是我的问题只是内存管理？
