错误的写法
_checkinLocation.coordinate.longitude = 26.876812;
_checkinLocation.coordinate.longitude = 100.22569199999998;
正确的写法
float latitude = 26.876812;
float longitude = 100.22569199999998; //这里可以是任意的经纬度值
CLLocation *_checkinLocation= [[[CLLocation alloc] initWithLatitude:latitude longitude:longitude] autorelease];