iOS入门（二十四）UIView

UIView 

第一类：互联网两大核心技术 ：  即时通讯  视频

第二类：面向对象不同（市场细分）： eg ：面向女性的应用

第三类：新闻类

音频

团购（用户体验，信息罗列）

购物

阅读

地图

目前移动互联网最暴利：手机游戏

command + 1 最大 +2 正常 +3 最小

3.5寸屏   物理尺寸 ：320*480    像素尺寸： 640*960

4寸屏  320*568

UIView的层级关系

frame 相对于父视图定义自己的位置

bounds 改变自己的位置关系（现在的原点相对于新的坐标系来说）改变尺寸大小时，保持中心点不变（不改变它的位置）

center 相对于父视图 确定中心点位置

    //建立一个UIWindow的对象， 并让它和屏幕一样大。

    self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];

    // Override point for customization after application launch.

    //设置window的背景颜色

    self.window.backgroundColor = [UIColor darkGrayColor];

    //如何创建UIView

    //CGRect 规定了一个矩形的位置和大小

    CGRect rect = {{10,20},{300,300}};

    UIView * view1 = [[UIView alloc]initWithFrame:rect];

    //把view贴到window上

    [self.window  addSubview:view1];

    [view1 setBackgroundColor :  [UIColor blackColor] ];

    [view1 release];

    CGRect rect2 = CGRectMake(10, 10, 280, 280);

    UIView * view2 = [[UIView alloc]initWithFrame:rect2];

    view2.backgroundColor = [UIColor blueColor];

    [view1 addSubview:view2];

    [view2 release];

    //设置为主window并且可见

    [self.window makeKeyAndVisible];

 

    //根据中心点重新设置矩形的位置

//    view2.center = CGPointMake(100, 100);

//    view2.bounds = CGRectMake(20, 20, 250, 250);

    UIView * view3 = [[UIView alloc] initWithFrame:CGRectMake(150, 150, 250, 250)];

    [_window addSubview:view3];

    view3.backgroundColor = [UIColor purpleColor];

    [view3 release];

    UIView * view4 = [[UIView alloc]initWithFrame:CGRectMake(200, 200, 200, 250)];

    view4.backgroundColor = [UIColor blueColor];

//    [view1 insertSubview:view4 atIndex:0];

//    [view1 insertSubview:view4 belowSubview:view2];

    [_window addSubview:view4];

    [view4 release];

    [_window sendSubviewToBack:view1];

    view4.hidden = NO;

    view3.alpha = 0.5;

    UIView * view5 = [view4 superview];

    view5.backgroundColor = [UIColor brownColor];

    [view5 release];

    NSArray * views = [_window subviews];

    UIView * view6 = [views objectAtIndex:1];

    view6.backgroundColor = [UIColor cyanColor];

//    view6.center = CGPointMake(150, 150);

    UIView * view7 = [view4.superview.subviews firstObject];

    view7.backgroundColor = [UIColor blackColor];

    view1.tag = 100;

    [[_window viewWithTag:100] setBackgroundColor:[UIColor greenColor]];

    

    UILabel * label1 = [[UILabel alloc]initWithFrame:CGRectMake(100, 100, 50, 20)];

    label1.backgroundColor = [UIColor blackColor];

    [_window addSubview:label1];

 

//    UIView * aview = [[UIView alloc]initWithFrame:CGRectMake(20, 40, 120, 240)];

//    aview.backgroundColor = [UIColor yellowColor];

//    [_window addSubview:aview];

//    [aview release];

//    UIView * bview = [[UIView alloc]initWithFrame:CGRectMake(40, 60, 120, 240)];

//    bview.backgroundColor = [UIColor greenColor];

//    [_window addSubview:bview];

//    [bview release];

//    UIView * cview = [[UIView alloc]initWithFrame:CGRectMake(60, 80, 120, 240)];

//    cview.backgroundColor = [UIColor brownColor];

//    [_window insertSubview:cview atIndex:1];

//    [cview release];

//    UIView * dview = [[UIView alloc]initWithFrame:CGRectMake(80, 100, 120, 240)];

//    dview.backgroundColor = [UIColor blueColor];

//    [_window insertSubview:dview aboveSubview:aview];

//    [dview release];

//    UIView * eview = [[UIView alloc]initWithFrame:CGRectMake(100, 120, 120, 240)];

//    eview.backgroundColor = [UIColor magentaColor];

//    [_window insertSubview:eview belowSubview:bview];

//    [eview release];

        [_window bringSubviewToFront:aview];

    [_window sendSubviewToBack:bview];

    [_window exchangeSubviewAtIndex:3 withSubviewAtIndex:4];

    [dview removeFromSuperview];