[英]Getting Location Services to work in IOS 8
我正在尝试更新一些旧代码以使其在IOS 8中正常工作。
但是对于如何正确实施该方法,我仍然很困惑。
我加了
<key>NSLocationWhenInUseUsageDescription</key>
<string>The spirit of stack overflow is coders helping coders</string>
<key>NSLocationAlwaysUsageDescription</key>
<string>I have learned more on stack overflow than anything else</string>
进入infoPlist.strings
但我不确定如何更新代码以使其正确执行。 这是我正在使用的旧代码的副本。 谁能提供有关如何正确更新此代码以使其与IOS 8配合使用的见识?
- (void)locationManager:(CLLocationManager *)manager didChangeAuthorizationStatus:(CLAuthorizationStatus)status {
NSLog(@"%s", __PRETTY_FUNCTION__);
switch (status) {
case kCLAuthorizationStatusAuthorizedAlways:
{
NSLog(@"kCLAuthorizationStatusAuthorized");
// Re-enable the post button if it was disabled before.
self.navigationItem.rightBarButtonItem.enabled = YES;
[self.locationManager startUpdatingLocation];
}
break;
case kCLAuthorizationStatusDenied:
NSLog(@"kCLAuthorizationStatusDenied");
{
UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:@"Anywall can’t access your current location.\n\nTo view nearby posts or create a post at your current location, turn on access for Anywall to your location in the Settings app under Location Services." message:nil delegate:self cancelButtonTitle:nil otherButtonTitles:@"OK", nil];
[alertView show];
// Disable the post button.
self.navigationItem.rightBarButtonItem.enabled = NO;
}
break;
case kCLAuthorizationStatusNotDetermined:
{
NSLog(@"kCLAuthorizationStatusNotDetermined");
}
break;
case kCLAuthorizationStatusRestricted:
{
NSLog(@"kCLAuthorizationStatusRestricted");
}
break;
}
}
我在这里使用的代码来自parse的Anywall教程的旧版本。 我尝试添加
case kCLAuthorizationStatusNotDetermined:
{
NSLog(@"kCLAuthorizationStatusNotDetermined");
[self.locationManager requestAlwaysAuthorization];
}
break;
另外,该应用程序还在地图上显示用户的位置,我也必须更新该方法吗?
您必须这样做:
1) #import <CoreLocation/CoreLocation.h>
2)设置委托CLLocationManagerDelegate
3)创建CLLocationManager *locationManager;
宾语
4)在.m文件中#define SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(v) ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] != NSOrderedAscending)
5)设置位置管理器
if (self.locationManager==nil) {
self.locationManager = [[CLLocationManager alloc]init];
}
self.locationManager.delegate = self;
CLAuthorizationStatus status = [CLLocationManager authorizationStatus];
// If the status is denied or only granted for when in use, display an alert
if (status == kCLAuthorizationStatusAuthorizedWhenInUse || status == kCLAuthorizationStatusDenied || status == kCLAuthorizationStatusRestricted) {
if (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"8.0"))
{
NSString *title;
title = (status == kCLAuthorizationStatusDenied) ? @"Location services are off" : @"Background location is not enabled";
NSString *message = @"To use background location you must turn on 'Always' in the Location Services Settings";
UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:title
message:message
delegate:self
cancelButtonTitle:@"Cancel"
otherButtonTitles:@"Settings", nil];
[alertView setTag:1001];
[alertView show];
[alertView release];
}
else{
NSString *titles;
titles = @"Title";
NSString *msg = @"Location services are off. To use location services you must turn on 'Always' in the Location Services Settings from Click on 'Settings' > 'Privacy' > 'Location Services'. Enable the 'Location Services' ('ON')";
UIAlertView *alertView = [[UIAlertView alloc] initWithTitle:titles
message:msg
delegate:nil
cancelButtonTitle:@"OK"
otherButtonTitles:nil];
[alertView show];
[alertView release];
}
}
// The user has not enabled any location services. Request background authorization.
else if (status == kCLAuthorizationStatusNotDetermined) {
if (SYSTEM_VERSION_GREATER_THAN_OR_EQUAL_TO(@"8.0"))
{
[self.locationManager requestAlwaysAuthorization];
}
}
[self.locationManager startUpdatingLocation];
6)设置iOS 8的警报视图
- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex{
if (alertView.tag==1001){
if (buttonIndex == 1) {
// Send the user to the Settings for this app
NSURL *settingsURL = [NSURL URLWithString:UIApplicationOpenSettingsURLString];
[[UIApplication sharedApplication] openURL:settingsURL];
}
}
}
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