iOS 8及以上版本可以跳转到系统setting中进行设置，用户可以根据APP的需要授权启用位置、通知、联系人、相机、日历以及健康等设置。
关键代码是这几句
// 跳到设置界面,进行设置
- (void)jumpToSetting{
NSURL *urlSetting = [NSURL URLWithString:UIApplicationOpenSettingsURLString];
if (urlSetting) {
if ([[UIApplication sharedApplication] canOpenURL:urlSetting]) {
[[UIApplication sharedApplication] openURL:urlSetting];
}
}
}
这一方法在iOS 9的系统中,应用效果更好！设置界面中将有一个返回按钮，能直接使用户返回到您的应用程序。非常方便!
下面是我写的一个Demo:
#import "ViewController.h"
#import <CoreLocation/CoreLocation.h>
@interface ViewController ()<CLLocationManagerDelegate>
/**
* 位置管理器
*/
@property (strong, nonatomic) CLLocationManager * locationManager;
- (IBAction)LocationBtnClick:(id)sender;
@end
@implementation ViewController
-(CLLocationManager *)locationManager{
if (_locationManager == nil) {
CLLocationManager *locationManager = [[CLLocationManager alloc] init];
_locationManager = locationManager;
}
return _locationManager;
}
- (void)viewDidLoad {
[super viewDidLoad];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (IBAction)LocationBtnClick:(id)sender {
// 先判断授权状态
CLAuthorizationStatus statue = [CLLocationManager authorizationStatus];
switch (statue) {
case kCLAuthorizationStatusNotDetermined:
NSLog(@"kCLAuthorizationStatusNotDetermined,请求授权");
[self requsetAuthorization];
break;
case kCLAuthorizationStatusDenied:
NSLog(@"kCLAuthorizationStatusDenied");
// 弹出提示用户是否去setting界面设置
[self showTipsWhetherToSetting];
break;
case kCLAuthorizationStatusAuthorizedAlways:
NSLog(@"kCLAuthorizationStatusAuthorizedAlways");
break;
case kCLAuthorizationStatusAuthorizedWhenInUse:
NSLog(@"kCLAuthorizationStatusAuthorizedWhenInUse");
break;
default:
break;
}
}
-(void)showTipsWhetherToSetting{
NSInteger systemNo = [[UIDevice currentDevice].systemVersion integerValue];
BOOL isMoreThan8 = systemNo > 8.0 ? YES : NO;
if (isMoreThan8) {
// UIAlertController
UIAlertController *alert = [UIAlertController alertControllerWithTitle:@"小樱桃需要你的位置" message:@"点击确定,前往设置" preferredStyle:UIAlertControllerStyleAlert];
__weak typeof(self) weakSelf = self;
UIAlertAction *determineAction = [UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDestructive handler:^(UIAlertAction * _Nonnull action) {
[weakSelf jumpToSetting];
}];
[alert addAction:determineAction];
UIAlertAction *cancleAction = [UIAlertAction actionWithTitle:@"取消" style:UIAlertActionStyleCancel handler:^(UIAlertAction * _Nonnull action) {
NSLog(@"取消操作");
}];
[alert addAction:cancleAction];
// modal出这个alerController
[self presentViewController:alert animated:YES completion:nil];
}else{
// UIActionsheet
}
}
// 跳到设置界面,进行设置
- (void)jumpToSetting{
NSURL *urlSetting = [NSURL URLWithString:UIApplicationOpenSettingsURLString];
if (urlSetting) {
if ([[UIApplication sharedApplication] canOpenURL:urlSetting]) {
[[UIApplication sharedApplication] openURL:urlSetting];
}
}
}
- (void)requsetAuthorization{
if ([CLLocationManager locationServicesEnabled]) {// 判断手机是否可以定位
[self.locationManager setDelegate:self];
[self.locationManager setDesiredAccuracy:kCLLocationAccuracyBestForNavigation];//设置精度
self.locationManager.distanceFilter = 5.0f;
// iOS8.0的API
if ([self.locationManager respondsToSelector:@selector(requestAlwaysAuthorization)]) {
[self.locationManager requestAlwaysAuthorization];// 请求授权
}
if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 8.0)
{
[self.locationManager requestWhenInUseAuthorization]; //调用了这句,就会弹出允许框了.
}
[self.locationManager startUpdatingLocation];//启动位置管理器
}
}
