Ios googleplacesapi没有返回任何内容

我正试图在MKMapView上显示来自Google Places的结果。调用代码以检索数据，但它不记录任何内容。我认为问题不在于添加注释，因为在日志中，它返回

Google数据：(
)

没有任何内容。我该如何解决这个问题。这是我正在使用的代码-

-(void)mapView:(MKMapView *)mapView regionDidChangeAnimated:(BOOL)animated {
    //Get the east and west points on the map so you can calculate the distance (zoom level) of the current map view.
    MKMapRect mRect = self.schoolMap.visibleMapRect;
    MKMapPoint eastMapPoint = MKMapPointMake(MKMapRectGetMinX(mRect), MKMapRectGetMidY(mRect));
    MKMapPoint westMapPoint = MKMapPointMake(MKMapRectGetMaxX(mRect), MKMapRectGetMidY(mRect));

    //Set your current distance instance variable.
    currenDist = MKMetersBetweenMapPoints(eastMapPoint, westMapPoint);

    //Set your current center point on the map instance variable.
    currentCentre = self.schoolMap.centerCoordinate;
}

-(void) queryGooglePlaces: (NSString *) googleType {

    CLLocation *userLoc = self.schoolMap.userLocation.location;
    CLLocationCoordinate2D userCoordinate = userLoc.coordinate;
    //Change the 9000!!
    // Build the url string to send to Google. NOTE: The kGOOGLE_API_KEY is a constant that should contain your own API key that you obtain from Google. See this link for more info:
    // https://developers.google.com/maps/documentation/places/#Authentication
    NSString *url = [NSString stringWithFormat:@"https://maps.googleapis.com/maps/api/place/search/json?location=%f,%f&radius=%@&types=%@&sensor=true&key=%@", currentCentre.latitude, currentCentre.longitude, [NSString stringWithFormat:@"%i", currenDist], googleType, kGOOGLE_API_KEY];

    //Formulate the string as a URL object.
    NSURL *googleRequestURL=[NSURL URLWithString:url];

    // Retrieve the results of the URL.
    dispatch_async(kBgQueue, ^{
        NSData* data = [NSData dataWithContentsOfURL: googleRequestURL];
        [self performSelectorOnMainThread:@selector(fetchedData:) withObject:data waitUntilDone:YES];
    });
}

-(void)fetchedData:(NSData *)responseData {
    //parse out the json data
    NSError* error;
    NSDictionary* json = [NSJSONSerialization
                          JSONObjectWithData:responseData

                          options:kNilOptions
                          error:&error];

    //The results from Google will be an array obtained from the NSDictionary object with the key "results".
    NSArray* places = [json objectForKey:@"results"];

    //Write out the data to the console.
    NSLog(@"Google Data: %@", places);
    [self plotPositions:places];
}

-(void)plotPositions:(NSArray *)data {
    // 1 - Remove any existing custom annotations but not the user location blue dot.
    for (id<MKAnnotation> annotation in self.schoolMap.annotations) {
        if ([annotation isKindOfClass:[MapPoint class]]) {
            [self.schoolMap removeAnnotation:annotation];
        }
    }
    // 2 - Loop through the array of places returned from the Google API.
    for (int i=0; i<[data count]; i++) {
        //Retrieve the NSDictionary object in each index of the array.
        NSDictionary* place = [data objectAtIndex:i];
        // 3 - There is a specific NSDictionary object that gives us the location info.
        NSDictionary *geo = [place objectForKey:@"geometry"];
        // Get the lat and long for the location.
        NSDictionary *loc = [geo objectForKey:@"location"];
        // 4 - Get your name and address info for adding to a pin.
        NSString *name=[place objectForKey:@"name"];
        NSString *vicinity=[place objectForKey:@"vicinity"];
        // Create a special variable to hold this coordinate info.
        CLLocationCoordinate2D placeCoord;
        // Set the lat and long.
        placeCoord.latitude=[[loc objectForKey:@"lat"] doubleValue];
        placeCoord.longitude=[[loc objectForKey:@"lng"] doubleValue];
        // 5 - Create a new annotation.
        MapPoint *placeObject = [[MapPoint alloc] initWithName:name address:vicinity coordinate:placeCoord];
        [self.schoolMap addAnnotation:placeObject];
    }
}

-（void）地图视图：（MKMapView*）地图视图区域IDChangeAnimated：（BOOL）动画{
//获取地图上的东点和西点，以便计算当前地图视图的距离（缩放级别）。
MKMapRect mRect=self.schoolMap.visibleMapRect；
MKMapPoint eastmapoint=MKMapPointMake（MKMapRectGetMinX（mRect）、MKMapRectGetMidY（mRect））；
MKMapPoint westMapPoint=MKMapPointMake（MKMapRectGetMaxX（mRect）、MKMapRectGetMidY（mRect））；
//设置当前距离实例变量。
CurrendList=各点之间的MkMeters（东映射点、西映射点）；
//在地图实例变量上设置当前中心点。
currentCentre=self.schoolMap.centercoordination；
}
-（void）queryGooglePlaces:（NSString*）Google类型{
CLLocation*userLoc=self.schoolMap.userLocation.location；
CLLocationCoordinate2D用户坐标=userLoc.coordinate；
//更改9000！！
//构建要发送到Google的url字符串。注意：kGOOGLE_API_键是一个常量，应该包含您从Google获得的自己的API键。有关详细信息，请参阅此链接：
// https://developers.google.com/maps/documentation/places/#Authentication
NSString*url=[NSString stringWithFormat:@”https://maps.googleapis.com/maps/api/place/search/json?location=%f，%f&radius=%@&types=%@&sensor=true&key=%@，currentcenter.latitude，currentcenter.longitude，[NSString stringWithFormat:@“%i”，currenDist]，googleType，kGOOGLE_API_key]；
//将字符串表示为URL对象。
NSURL*googleRequestURL=[NSURL URLWithString:url]；
//检索URL的结果。
调度异步（kBgQueue^{
NSData*data=[NSData dataWithContentsOfURL:googleRequestURL]；
[self-performSelectorOnMainThread:@selector（fetchedData:）with object:data waitUntilDone:YES]；
});
}
-（void）获取数据：（NSData*）响应数据{
//解析出json数据
n错误*错误；
NSDictionary*json=[NSJSONSerialization
JSONObjectWithData:responseData
选项：针织品
错误：&错误]；
//来自Google的结果将是从NSDictionary对象获得的一个数组，其中包含键“results”。
NSArray*places=[json objectForKey:@“结果”]；
//将数据写入控制台。
NSLog（@“谷歌数据：%@”，位置）；
[自绘制位置：位置]；
}
-（无效）绘图位置：（NSArray*）数据{
//1-删除任何现有的自定义批注，但不删除用户位置蓝点。
for（self.schoolMap.annotations中的id注释）{
if（[annotation isKindOfClass:[MapPoint class]]）{
[self.schoolMap removeAnnotation:annotation]；
}
}
//2-遍历从GoogleAPI返回的位置数组。
对于（int i=0；这就是我所说的“无处可去”你能分享你在查询中发送的确切url参数吗？“我正试图在我的MKMapView上显示Google Places的结果”不要这样做。如果你有谷歌数据，你必须在谷歌地图上显示，这是他们的条款和条件。有没有办法在没有谷歌位置的MKMapView上做同样的事情呢？那么@CraigSure，你可以在MKMapView上显示各种结果，你只需要找到一个允许你的源。或者切换到使用谷歌的地图元素