ios 一行代码一张图片实现新手指引功能

//调用
if ( ![[NSUserDefaults standardUserDefaults] boolForKey:@"firstCouponBoard_iPhone_0"]) {
      [self newUserGuide:CGRectMake(15,260, ScreenW/2.0-30,90) imgFrame:CGRectMake(0, 350, ScreenW, 243) imgName:@"newUserGuide_0" viewTag:0];
   }

#pragma mark - ===== 新手指引 =====
- (void)newUserGuide:(CGRect)rectFrame imgFrame:(CGRect)imgFrame imgName:(NSString *)imgName viewTag:(NSInteger)vTag;
{
    // 这里创建指引在这个视图在window上
    CGRect frame = [UIScreen mainScreen].bounds;
    UIView * bgView = [[UIView alloc]initWithFrame:frame];
    bgView.tag = vTag;
    bgView.backgroundColor = RGBColor(0, 0, 0, 0.6);
    UITapGestureRecognizer * tap = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(sureTapClick:)];
    [bgView addGestureRecognizer:tap];
    [[UIApplication sharedApplication].keyWindow addSubview:bgView];
    
    //create path 重点来了（**这里需要添加第一个路径）
    UIBezierPath *path = [UIBezierPath bezierPathWithRect:frame];
    [path appendPath:[[UIBezierPath bezierPathWithRoundedRect:rectFrame cornerRadius:10] bezierPathByReversingPath]];
    CAShapeLayer *shapeLayer = [CAShapeLayer layer];
    shapeLayer.path = path.CGPath;
    [bgView.layer setMask:shapeLayer];
    
    UIImageView * imageView = [[UIImageView alloc]initWithFrame:imgFrame];//
    imageView.image = [UIImage imageNamed:imgName];
    imageView.contentMode = UIViewContentModeScaleAspectFit;//UIViewContentModeCenter;//
    [bgView addSubview:imageView];
    
}
/**
 *   新手指引确定
 */
- (void)sureTapClick:(UITapGestureRecognizer *)tap
{
    UIView * view = tap.view;
    [view removeFromSuperview];
    [view removeGestureRecognizer:tap];
    
    if (view.tag == 0) {
        [self newUserGuide:CGRectMake(ScreenW/2.0+15,260, ScreenW/2.0-30,90) imgFrame:CGRectMake(0,350, ScreenW, 243) imgName:@"newUserGuide_1" viewTag:1];
    }else if (view.tag == 1){
        [self newUserGuide:CGRectMake(15, 420, ScreenW-30,90) imgFrame:CGRectMake(0, 298, ScreenW, 305) imgName:@"newUserGuide_2" viewTag:2];
    }else if (view.tag == 2){
        [self newUserGuide:CGRectMake(10, 510, 110,74) imgFrame:CGRectMake(0, 384, ScreenW, 140) imgName:@"newUserGuide_3" viewTag:3];
    }else if (view.tag == 3){
        [self newUserGuide:CGRectMake(0, ScreenH-TabbarHeight, ScreenW,TabbarHeight) imgFrame:CGRectMake(0, ScreenH-TabbarHeight-237, ScreenW, 237) imgName:@"newUserGuide_4" viewTag:4];
    } else{
        UIView * view = tap.view;
        [view removeFromSuperview];
        [view removeGestureRecognizer:tap];
        [[NSUserDefaults standardUserDefaults] setBool:YES forKey:@"firstCouponBoard_iPhone_0"];
    }
}