12、UIView-OC+UI

UIView 基本属性1

UIView 介绍：

UIView 基本属性介绍

 

UIWindow:

CGRectMake

#import "ccyAppDelegate.h"@implementation ccyAppDelegate- (void)dealloc{    //还没写代码就运行的白色界面就是UIWindow    [_window release];    [super dealloc];}- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions{    self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];    // Override point for customization after application launch.        /*     3gs - 320*480（分辨率）     4,4s - 640*960     但是上面这手机屏幕比例／尺寸没有改变，改变是密度     在supporting files中有两个图：     Default.png（320*480）     [e-mail]（640*960）     两台手机程序不变，只要图片添加一个高分辨力的图片＋@2x，这样就可以了。          5 － 640*1136 （最重要是屏幕比例变了）以后讲解     */    UIView * view1 = [[UIView alloc] init];    view1.frame = CGRectMake(10, 30, 300, 30);    view1.backgroundColor = [UIColor redColor];    [self.window addSubview:view1];    [view1 release];    UIView * view2 = [[UIView alloc] init];    view2.frame = CGRectMake(10, 20, 300, 30);    view2.backgroundColor = [UIColor blueColor];    //将view2添加到父view1中 CGRectMake是相对于 view1左上角相对位置    [view1 addSubview:view2];    [view2 release];        NSLog(@"frame - x = %f", view2.frame.origin.x);    NSLog(@"frame - y = %f", view2.frame.origin.y);    NSLog(@"frame - w = %f", view2.frame.size.width);    NSLog(@"frame - h = %f", view2.frame.size.height);   /*    frame - x = 10.000000    frame - y = 20.000000    frame - w = 300.000000    frame - h = 30.000000    */            //等到view2的中心点    //CGPoint 是一个类 所以不能 加 ＊ 号    CGPoint point = view2.center;    NSLog(@"point - x = %f", point.x);    NSLog(@"point - y = %f", point.y);    /*     point - x = 160.000000     point - y = 35.000000     */        //得到边框大小 bounds不能得到x和y    CGRect bounds = view2.bounds;    NSLog(@"bounds - x = %f", bounds.origin.x);    NSLog(@"bounds - y = %f", bounds.origin.y);    NSLog(@"bounds - w = %f", bounds.size.width);    NSLog(@"bounds - h = %f", bounds.size.height);    /*     bounds - x = 0.000000     bounds - y = 0.000000     bounds - w = 300.000000     bounds - h = 30.000000     */        //设置视图标签    view2.tag = 2;        //设置内容模式 后面imageVIew 会讲解   // view2.contentMode =        self.window.backgroundColor = [UIColor whiteColor];    [self.window makeKeyAndVisible];    return YES;}

UIView 基本属性2【视图自动缩放】

UIView 基本属性介绍：

#import "ccyAppDelegate.h"@implementation ccyAppDelegate{    UIView * _backView;}- (void)dealloc{    [_backView release];    [_window release];    [super dealloc];}- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions{    self.window = [[[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]] autorelease];    // Override point for customization after application launch.        //例1    UIView * view1 = [[UIView alloc] init];    view1.frame = CGRectMake(10, 30, 300, 30);    view1.backgroundColor = [UIColor redColor];    [self.window addSubview:view1];    [view1 release];        UIView * view2 = [[UIView alloc] init];    view2.frame = CGRectMake(0, 5, 100, 20);    view2.backgroundColor = [UIColor blueColor];    [view1 addSubview:view2];    [view2 release];        UIView * view3 = [[UIView alloc] init];    view3.frame = CGRectMake(100, 5, 100, 20);    view3.backgroundColor = [UIColor grayColor];    [view1 addSubview:view3];    [view3 release];        //得到父类视图    UIView * superView = view2.superview;    superView.backgroundColor = [UIColor greenColor];        //得到子类视图数组    NSArray * subViews = view1.subviews;    NSLog(@"count = %d", subViews.count);    // count = 2    //for( UIView * view in subViews)    //{    //    view.backgroundColor = [UIColor blueColor];    //}    //数组的顺序[最先加入到父视图的在数组中就是第1个]    UIView * view = [subViews objectAtIndex:0];    view.backgroundColor = [UIColor redColor];            //例2    UIView * blueView = [[UIView alloc] init];    blueView.frame = CGRectMake(10, 100, 300, 30);    blueView.backgroundColor = [UIColor blueColor];    [self.window addSubview:blueView];    [blueView release];    //自动剪裁功能 [如果子类视图超出父视图，会被剪裁 － 子类视图 小于等于 父亲视图]    blueView.clipsToBounds = YES;        UIView * greenView = [[UIView alloc] init];    greenView.frame = CGRectMake(10, 10, 100, 100);    greenView.backgroundColor = [UIColor greenColor];    [blueView addSubview:greenView];    [greenView release];    //设置透明度 [0 - 1] 0不透明    greenView.alpha = 0.5;        //例3    //自动布局    _backView = [[UIView alloc] init];    _backView.frame = CGRectMake(100, 200, 120, 120);    _backView.backgroundColor =[UIColor blackColor];    //准许子视图使用自动布局方式    _backView.autoresizesSubviews =YES;    [self.window addSubview:_backView];        UIView * topView = [[UIView alloc] init];    topView.frame = CGRectMake(10, 10, 100, 100);    topView.backgroundColor = [UIColor orangeColor];    //设置自动布局方式    /*     UIViewAutoresizingNone                 - none     //设置 左右，上下头可以改变     UIViewAutoresizingFlexibleLeftMargin   -      UIViewAutoresizingFlexibleRightMargin     UIViewAutoresizingFlexibleTopMargin         UIViewAutoresizingFlexibleBottomMargin         //设置 宽 和 高 都和父视图同时改变     UIViewAutoresizingFlexibleWidth     UIViewAutoresizingFlexibleHeight     */    topView.autoresizingMask = UIViewAutoresizingFlexibleRightMargin |    UIViewAutoresizingFlexibleTopMargin;    [_backView addSubview:topView];    [topView release];    [NSTimer scheduledTimerWithTimeInterval:0.5 target:self selector:@selector(timeTick) userInfo:nil repeats:YES];        self.window.backgroundColor = [UIColor whiteColor];    [self.window makeKeyAndVisible];    return YES;}- (void)timeTick{    _backView.frame = CGRectMake(_backView.frame.origin.x, _backView.frame.origin.y, _backView.frame.size.width+5, _backView.frame.size.height+5);}

UIView 基本属性3【UIView 层操作】

UIView调整层的常用方法

获取层，并修改该层的颜色