iOS 添加功能引导图
首次安装app之后，打开app首页，有一张功能引导图，其实最简单的一种做法是，直接在这个首页上加一个蒙层图片。 在蒙层上用气泡显示文字注明功能介绍，这个蒙层图片，让你们的UI设计师给你。
然后在进入首页的viewDidAppear方法里，添加上你的蒙层
[self initIntroduceView];
下面是添加的简单示例代码：
示例
- (void)initIntroduceView
{
if (![USERDEFAULT objectForKey:@"IsShowIntro"]) {
UIImageView *introImg = [[UIImageView alloc] initWithFrame:self.view.bounds];
introImg.tag = INTRO_TAG;
introImg.userInteractionEnabled = YES;
if (iPhone4S) {
introImg.image = [UIImage imageNamed:@"explanation_960"];
}
else
{
introImg.image = [UIImage imageNamed:@"explanation"];
}
[self.tabBarController.view addSubview:introImg];
UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(removeIntroImg)];
tap.numberOfTapsRequired = ;
[introImg addGestureRecognizer:tap];
}
}
- (void)removeIntroImg
{
[USERDEFAULT setObject:[NSNumber numberWithBool:YES] forKey:@"IsShowIntro"];
UIImageView *imgView = (UIImageView *)[self.tabBarController.view viewWithTag:INTRO_TAG];
[imgView removeFromSuperview];
}
关于几个宏
#define USERDEFAULT [NSUserDefaults standardUserDefaults]
#define iPhone4S ([UIScreen instancesRespondToSelector:@selector(currentMode)] ? CGSizeEqualToSize(CGSizeMake(640, 960), [[UIScreen mainScreen] currentMode].size) : NO)
#define INTRO_TAG 50000