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CLLocation *newLocation = [locations lastObject];

// 地理编码完成后的回调函数CLGeocodeCompletionHandler handler = ^(NSArray *place, NSError *error) {for (CLPlacemark *placemark in place) {NSString *cityStr = [placemark.addressDictionary objectForKey:@"City"];locationLab.text = cityStr;break;}};

// 开始逆地理编码[self.geocoder reverseGeocodeLocation:newLocation completionHandler:handler];