Question

我想从WatchOS上的API获取数据，因为我使用NSURLConnection但我得到的错误在WatchOS2中不可用，在这里我添加了我使用的代码，请参阅＆amp;帮助我，谢谢

NSURLRequest *urlrequest =[NSURLRequest requestWithURL:[NSURL URLWithString:@"http://api.openweathermap.org/data/2.5/weather?q=London,uk&appid=2de143494c0b295cca9337e1e96b00e0"]];
NSURLResponse *responce = nil;
NSError *error = nil;
NSData* data = [NSURLConnection sendSynchronousRequest:urlrequest returningResponse:&responce error:&error];
NSMutableDictionary *allData = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:&error];
NSString *currentWeather = nil;
NSArray* weather = allData[@"weather"];
for (NSDictionary *theWeather in weather)
 {
  currentWeather = theWeather[@"main"];
 }
 self.lbl.text = currentWeather;

Answer 1

从iOS9开始，

NSURLConnection已被弃用。所以你应该研究NSURLSession API。至于此特定错误，此API（sendSynchronousRequest :）禁止使用WatchOS。关于此API的command+click，您会看到__WATCHOS_PROHIBITED标记。

NSURLSession提供dataTaskWithRequest:completionHandler:作为替代。但是，这不是同步调用。因此，您需要稍微更改一下代码，并在达到completionHandler后开始工作。使用以下代码

NSURLRequest *urlrequest =[NSURLRequest requestWithURL:[NSURL URLWithString:@"http://api.openweathermap.org/data/2.5/weather?q=London,uk&appid=2de143494c0b295cca9337e1e96b00e0"]];
NSURLSession *session = [NSURLSession sharedSession];
[[session dataTaskWithRequest:urlrequest completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
          NSMutableDictionary *allData = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:nil];
          //Here you do rest of the stuff.
}] resume];

sendSynchronousRequest：urlrequest returningResponse：＆amp; responce error：＆amp; error is notavilable in WatchOS2

1 个答案: