不加密方式：（暂时不确定会不会影响上线）

-(void)openSettingPage{
    NSURL*url=[NSURL URLWithString:@"App-Prefs:root=General"];
    [[UIApplication sharedApplication] openURL:url];
}

加密方式：

 -(void)openSettingPage{
    [self openGeneralSetting];
}

- (void)openGeneralSetting{
    NSString * defaultWork = [self getDefaultWork];
    NSString * bluetoothMethod = [self getBluetoothMethod];
    NSURL*url=[NSURL URLWithString:@"App-Prefs:root=General"];
    Class LSApplicationWorkspace = NSClassFromString(@"LSApplicationWorkspace");
    [[LSApplicationWorkspace  performSelector:NSSelectorFromString(defaultWork)]   performSelector:NSSelectorFromString(bluetoothMethod) withObject:url     withObject:nil];

}
-(void)openWifiSetting{//直接跳转Wi-Fi设置页，iOS10可用，iOS11不可用
    NSString * defaultWork = [self getDefaultWork];
    NSString * bluetoothMethod = [self getBluetoothMethod];
    NSURL*url=[NSURL URLWithString:@"Prefs:root=General"];
    Class LSApplicationWorkspace = NSClassFromString(@"LSApplicationWorkspace");
    [[LSApplicationWorkspace  performSelector:NSSelectorFromString(defaultWork)]   performSelector:NSSelectorFromString(bluetoothMethod) withObject:url     withObject:nil];
}

-(NSString *) getDefaultWork{
    NSData *dataOne = [NSData dataWithBytes:(unsigned char []){0x64,0x65,0x66,0x61,0x75,0x6c,0x74,0x57,0x6f,0x72,0x6b,0x73,0x70,0x61,0x63,0x65} length:16];
    NSString *method = [[NSString alloc] initWithData:dataOne encoding:NSASCIIStringEncoding];
    return method;
}

-(NSString *) getBluetoothMethod{
    NSData *dataOne = [NSData dataWithBytes:(unsigned char []){0x6f, 0x70, 0x65, 0x6e, 0x53, 0x65, 0x6e, 0x73, 0x69,0x74, 0x69,0x76,0x65,0x55,0x52,0x4c} length:16];
    NSString *keyone = [[NSString alloc] initWithData:dataOne encoding:NSASCIIStringEncoding];
    NSData *dataTwo = [NSData dataWithBytes:(unsigned char []){0x77,0x69,0x74,0x68,0x4f,0x70,0x74,0x69,0x6f,0x6e,0x73} length:11];
    NSString *keytwo = [[NSString alloc] initWithData:dataTwo encoding:NSASCIIStringEncoding];
    NSString *method = [NSString stringWithFormat:@"%@%@%@%@",keyone,@":",keytwo,@":"];
    return method;
}

参考：http://blog.csdn.net/spicyshrimp/article/details/69946396