引导视图
http://www.jianshu.com/p/261b79ee392c
使用默认样式快速调用 WQGuideView
WQGuideView *guideView = [[WQGuideView alloc] initWithFrame:self.view.bounds
guides:mutableGuides];
[self.view addSubview:guideView];
[guideView showGuide];