UIView

   //1.UIView创建和使用
    //  重要性:
    //  (1) 常见控件父类或间接父类都是UIView
    //UILabel->UIView
    //UIImageView->UIView
    //UIButton->UIControl->UIView
    //  (2)自定义控件
    //  继承与UIView, view加上其他控件
    //  (3)使用UIView作为界面布局, UIView作为其他控件的容器
    //理解:
显示一块矩形区域
    UIView *view1 = [[UIView
alloc] init];
    view1.frame =
CGRectMake(100, 100, 100, 100);
    view1.backgroundColor = [UIColor
redColor];
    [self.view
addSubview:view1];
    
    //2.常用属性
    //位置
    //view1.frame
    //只改大小,
不改位置
    view1.bounds =
CGRectMake(0, 0, 50, 50);
    view1.backgroundColor = [UIColor
yellowColor];
    
    //使用tag区分不同控件
    //view1.tag = 100;
    
    //设置中心点位置
    view1.center =
CGPointMake(50, 50);
    
    //是否打开用户交互
    //UILabel和UIImageView控件这个值是NO
    //  按钮加入到UIImageView没有反应
    view1.userInteractionEnabled =
YES;
    
    //view设置圆角
    view1.layer.cornerRadius = 10;
    view1.clipsToBounds =
YES;
    
    //是否隐藏
    view1.hidden =
YES;
    view1.hidden =
NO;
    
    //透明度
    view1.alpha = 0.7;
    
    //3.常用方法
    //view1 addSubview:<#(UIView *)#>
    //界面上移除控件
    //[view1 removeFromSuperview];
    
    //视图层级关系方法
    view1.frame =
CGRectMake(100, 100, 100, 100);
    
    UIView *view2 = [[UIView
alloc] initWithFrame:CGRectMake(150, 150, 100, 100)];
    view2.backgroundColor = [UIColor
blueColor];
    [self.view
addSubview:view2];
    
    //放到最前面
    [self.view
bringSubviewToFront:view1];
    
    //最后面
    [self.view
sendSubviewToBack:view1];
    
    //插入视图
    UIView *view3 = [[UIView
alloc] initWithFrame:CGRectMake(125, 125, 100, 100)];
    view3.backgroundColor = [UIColor
greenColor];
    //[self.view addSubview:view3];
    [self.view
insertSubview:view3 belowSubview:view2];
    
    //属性
    //所有子视图
    //self.view.subviews
    
    //父视图
    //self.view.superview
    
    //4.使用UIView进行控件自定义和界面布局
    //  view+2个label+一个图片
    //原理:
只是原理展示, 控件定制需要继承
    UIView *photoView = [[UIView
alloc] initWithFrame:CGRectMake(0, 300, 320, 100)];
    photoView.backgroundColor = [UIColor
lightGrayColor];
    [self.view
addSubview:photoView];
    
    //头像
    UIImageView *headImageView = [[UIImageView
alloc] initWithFrame:CGRectMake(20, 20, 60, 60)];
    headImageView.image = [UIImage
imageNamed:@"defaultHead.png"];
    [photoView addSubview:headImageView];
    
    UILabel *label = [[UILabel
alloc] initWithFrame:CGRectMake(100, 20, 100, 30)];
    label.text =
@"风景";
    [photoView addSubview:label];
    
    
    UILabel *timeLabel = [[UILabel
alloc] initWithFrame:CGRectMake(100, 60, 100, 30)];
    timeLabel.text =
@"2014-08-26";
    [photoView addSubview:timeLabel];
    
    UITapGestureRecognizer *tap = [[UITapGestureRecognizer
alloc] initWithTarget:self
action:@selector(dealTap)];
    [photoView addGestureRecognizer:tap];
    
    //5.UIView的动画(扩展:
仿射变换)
    UIImageView *bullet = [[UIImageView
alloc] initWithFrame:CGRectMake(10, 450, 20, 20)];
    bullet.image = [UIImage
imageNamed:@"bullet.png"];
    [self.view
addSubview:bullet];

//    [UIView animateWithDuration:2 animations:^{
//        bullet.frame = CGRectMake(300, 450, 50, 50);
//        bullet.alpha = 0;
//    }];
    
    //
    [UIView
animateWithDuration:4 delay:0
options:UIViewAnimationOptionAutoreverse
animations:^{
        bullet.frame =
CGRectMake(300, 450, 50, 50);
        //bullet.alpha = 0;
    } completion:^(BOOL finished) {
        [bullet removeFromSuperview];
    }];
    
}
-(void)dealTap
{
    NSLog(@"点击相册");
}