json user error

[zengxianshu]

file RunTrace.m

-(void)checkUpdate
{
NSString *urlStr = [NSString stringWithFormat:@"https://api.github.com/repos/sx1989827/RunTrace/tags"];
NSString *newStr = [urlStr stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
NSURL *url = [NSURL URLWithString:newStr];
NSURLRequest *requst = [NSURLRequest requestWithURL:url cachePolicy:NSURLRequestReloadIgnoringLocalCacheData timeoutInterval:10];
[NSURLConnection sendAsynchronousRequest:requst queue:[NSOperationQueue mainQueue] completionHandler:^(NSURLResponse *response, NSData *data, NSError *connectionError) {
if(connectionError!=nil)
{
return;
}
NSArray *arr = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:nil];
version=[arr[0][@"name"] floatValue];
}];
}

po arr

{
"documentation_url" = "https://developer.github.com/v3/#rate-limiting";
message = "API rate limit exceeded for 106.50.192.98. (But here's the good news: Authenticated requests get a higher rate limit. Check out the documentation for more details.)";
}