//演示UIView的使用
//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:UIViewAnimationOptionCurveEaseOut animations:^{
bullet.frame = CGRectMake(300, 450, 50, 50);
//bullet.alpha = 0;
} completion:^(BOOL finished) {
[bullet removeFromSuperview];
}];
// 调整 UIView 的位置关系
将一个UIView显示在最前面只需要调用其父视图的 bringSubviewToFront（）方法。
将一个UIView层推送到背后只需要调用其父视图的 sendSubviewToBack（）方法。
用第二层子视图 换 第一层子视图的位置 self.view是第0层
[self.view exchangeSubviewAtIndex:1 withSubviewAtIndex:2];
}
-(void)dealTap
{
NSLog(@"点击相册");
}
