objective-c - 使用ios的系统地图api路线规划画线，在有的手机上不能显示线路？

Answer 1

[geocoder geocodeAddressString:@"Butterfly Lovers Cultural Park" completionHandler:^(NSArray placemarks, NSError error) {

   CLPlacemark *placemark2 = [placemarks firstObject];
   [self drawPlacemark1:placemark1 placemark2:placemark2];

}];

Should the placemark2 and placemark1 pointers be exchanged during the traversal process? placemark2和placemark1指针。

抱歉上面是瞎说的。

我测了你的代码，在我的设备上可以画出线路，从浙江省宁波市鄞州区天宫庄园到浙江省宁波市鄞州区梁祝文化公园

Sorry the above is nonsense. #🎜🎜# #🎜🎜#I tested your code and I can draw a line on my device, from Tiangong Manor, Yinzhou District, Ningbo City, Zhejiang Province to Liangzhu Cultural Park, Yinzhou District, Ningbo City, Zhejiang Province , it is recommended that you add a log or breakpoint in the drawPlacemark1 method to check whether the CLPlacemark returns correctly. Poor network conditions will cause this situation, and you should handle it accordingly, that is, you should check whether NSError has a value and handle it accordingly. . #🎜🎜#