【发布时间】：2017-04-28 13:26:46
【问题描述】：
我需要使用 MKPointAnnotation 显示附近人的位置。我只有这些地址。我试图通过 Geocode 和 Google API 获得 lat、lng。有时我会得到正确的回应。有时我会收到 NULL 响应和 HTML 响应。我附上了我的代码 sn-p 和响应。如何处理 NULL 问题和响应的 HTML 格式。如果您已经遇到过这个问题，请帮助我。以及从地址获取 lat,lng 的任何替代方法。
方法一：
double latitude = 0, longitude = 0;
NSString *req = [NSString stringWithFormat:@"http://maps.google.com/maps/api/geocode/json?sensor=false&address=chennai"];
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;
NSLog(@"Latitute : %f",center.latitude);
NSLog(@"Logitute : %f",center.longitude);
方法二：
CLGeocoder *geoCoder = [[CLGeocoder alloc] init];
[geoCoder geocodeAddressString:@"chennai" completionHandler:^(NSArray *placemarks, NSError *error) {
CLPlacemark *placemark = [placemarks objectAtIndex:0];
CLLocation *location = placemark.location;
CLLocationCoordinate2D coordinate = location.coordinate;
NSLog(@"Latitude %f", coordinate.latitude);
NSLog(@"Longitude %f", coordinate.longitude);
}];
HTML 响应：
<html>
<head>
<title>Please wait while the login page is loaded...</title>
<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
<META HTTP-EQUIV="PRAGMA" CONTENT="NO-CACHE"/>
<META HTTP-EQUIV="EXPIRES" CONTENT="-1"/>
<META HTTP-EQUIV="Refresh" CONTENT="2;URL=http://201.132.12.642:7002/userportal/?requesturi=http%3a%2f%2fmaps%2egoogle%2ecom%2fmaps%2fapi%2fgeocode%2fjson%3fsensor%3dfalse%26address%3dChennai&ip=10%2e0%2e1%2e134&mac=74%3a1b%3ab2%3a29%3a20%3a69&nas=aerovoyce&requestip=maps%2egoogle%2ecom&sc=9f491d49d008fc568408c965a3d3bcf0">
</head>
<body>
<p align="center">Please wait...<p>
Please wait while the login page is loaded...
<!---
<msc>
<login_url><![CDATA[http://201.132.12.642:7002/userportal/NSCLOGIN.do?requesturi=http%3a%2f%2fmaps%2egoogle%2ecom%2fmaps%2fapi%2fgeocode%2fjson%3fsensor%3dfalse%26address%3dChennai&ip=10%2e0%2e1%2e134&mac=74%3a1b%3ab2%3a29%3a20%3a69&nas=aerovoyce&requestip=maps%2egoogle%2ecom&sc=9f491d49d008fc568408c965a3d3bcf0]]></login_url>
<logout_url><![CDATA[http://201.132.12.642:7002/userportal/NSCLOGOUT.do?requesturi=http%3a%2f%2fmaps%2egoogle%2ecom%2fmaps%2fapi%2fgeocode%2fjson%3fsensor%3dfalse%26address%3dChennai&ip=10%2e0%2e1%2e134&mac=74%3a1b%3ab2%3a29%3a20%3a69&nas=aerovoyce&requestip=maps%2egoogle%2ecom&sc=9f491d49d008fc568408c965a3d3bcf0]]></logout_url>
<status_url><![CDATA[http://201.132.12.642:7002/userportal/NSCSTATUS.do?requesturi=http%3a%2f%2fmaps%2egoogle%2ecom%2fmaps%2fapi%2fgeocode%2fjson%3fsensor%3dfalse%26address%3dChennai&ip=10%2e0%2e1%2e134&mac=74%3a1b%3ab2%3a29%3a20%3a69&nas=aerovoyce&requestip=maps%2egoogle%2ecom&sc=9f491d49d008fc568408c965a3d3bcf0]]></status_url>
<update_url><![CDATA[http://201.132.12.642:7002/userportal/NSCUPDATE.do?requesturi=http%3a%2f%2fmaps%2egoogle%2ecom%2fmaps%2fapi%2fgeocode%2fjson%3fsensor%3dfalse%26address%3dChennai&ip=10%2e0%2e1%2e134&mac=74%3a1b%3ab2%3a29%3a20%3a69&nas=aerovoyce&requestip=maps%2egoogle%2ecom&sc=9f491d49d008fc568408c965a3d3bcf0]]></update_url>
<content_url><![CDATA[http://201.132.12.642:7002/userportal/NSCCONTENT.do?requesturi=http%3a%2f%2fmaps%2egoogle%2ecom%2fmaps%2fapi%2fgeocode%2fjson%3fsensor%3dfalse%26address%3dChennai&ip=10%2e0%2e1%2e134&mac=74%3a1b%3ab2%3a29%3a20%3a69&nas=aerovoyce&requestip=maps%2egoogle%2ecom&sc=9f491d49d008fc568408c965a3d3bcf0]]></content_url>
</msc>
-->
</body>
</html>
【问题讨论】：
-
@Gagan_iOS 当然。我会尝试。谢谢。
标签： ios objective-c mapkit core-location