所以我有一个简单的应用程序，将地址作为字符串传递给视图，然后使用
- (CLLocationCoordinate2D) geoCodeUsingAddress:(NSString *)address
{
double latitude = 0, longitude = 0;
NSString *esc_addr = [address stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
NSString *req = [NSString stringWithFormat:@"http://maps.google.com/maps/api/geocode/json?sensor=false&address=%@", esc_addr];
NSString *result = [NSString stringWithContentsOfURL:[NSURL URLWithString:req] encoding:NSUTF8StringEncoding error:NULL];
if (result) {
NSScanner *scanner = [NSScanner scannerWithString:result];
if ([scanner scanUpToString:@"\"lat\" :" intoString:nil] && [scanner scanString:@"\"lat\" :" intoString:nil]) {
[scanner scanDouble:&latitude];
if ([scanner scanUpToString:@"\"lng\" :" intoString:nil] && [scanner scanString:@"\"lng\" :" intoString:nil]) {
[scanner scanDouble:&longitude];
}
}
}
CLLocationCoordinate2D center;
center.latitude = latitude;
center.longitude = longitude;
return center;
}
在模拟器上效果很好。将其加载到手机上后，我放置的引脚的坐标不再位于地址的经度/纬度，而是0,0。
这是怎么回事？提前致谢。
像这样更改您的方法：
- (CLLocationCoordinate2D)geoCodeUsingAddress:(NSString *)address
{
double latitude = 0, longitude = 0;
NSString *esc_addr = [address stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
NSString *req = [NSString stringWithFormat:@"http://maps.googleapis.com/maps/api/geocode/json?address=%@&sensor=false", esc_addr];
NSData *data = [NSData dataWithContentsOfURL:[NSURL URLWithString:req]];
NSError *err = nil;
NSMutableDictionary *jsonDict = [NSJSONSerialization JSONObjectWithData:data options:kNilOptions error:&err];
if (!err)
{
NSLog(@"status = %@",[jsonDict objectForKey:@"status"]);
if ([[jsonDict objectForKey:@"status"] isEqualToString:@"OK"])
{
latitude = [[[[[[jsonDict objectForKey:@"results"] objectAtIndex:0] objectForKey:@"geometry"] objectForKey:@"location"] objectForKey:@"lat"] doubleValue];
longitude = [[[[[[jsonDict objectForKey:@"results"] objectAtIndex:0] objectForKey:@"geometry"] objectForKey:@"location"] objectForKey:@"lng"] doubleValue];
}
}
CLLocationCoordinate2D center;
center.latitude = latitude;
center.longitude = longitude;
return center;
}
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我来说两句