if (@available(iOS 11.0, *))
{
NSURL *url= [NSURL URLWithString:@"App-Prefs:root=General&path=Bluetooth"];
[[UIApplication sharedApplication] openURL:url options:@{} completionHandler:nil];
}else{
NSURL *url = [NSURL URLWithString:@"App-Prefs:root=Bluetooth"];
if ([[UIApplication sharedApplication]canOpenURL:url]) {
[[UIApplication sharedApplication]openURL:url];
}
}
原文：http://blog.51cto.com/smengxiang/2136739