Ios6 错误域=NSURLErrorDomain代码=-1000“；“错误的URL”；UserInfo=0x9eaa6b0

当启动NSURLConnection时，有时会出现以下错误

但是，并非总是会出现这种错误

Error Domain=NSURLErrorDomain Code=-1000 "bad URL" UserInfo=0x9eaa6b0 {NSUnderlyingError=0xae8c730 "bad URL", NSLocalizedDescription=bad URL}

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url中有空格是导致该错误的原因

NSString *urlString =[NSString stringWithFormat:@"&street=%@&street2=&city=%@&state=%@&
zipcode=%@&candidates=10", address.address2,address.city, address.state, address.zip5];
NSLog(@"BAD URL - %@",urlString ); // there is space in url

NSString *encodedUrl = [urlString stringByAddingPercentEscapesUsingEncoding: NSUTF8StringEncoding];
NSLog(@" CORRECT URL - %@", encodedUrl); // url encode that space by %20


NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:[NSURL RLWithString:encodedUrl]];

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六羟甲基三聚氰胺六甲醚。。。我怀疑你的URL可能不好。它工作正常，但有时只会出错。URL中有空格是导致错误的原因。帮助你。