个人iOS学习历程 - UIView和UILabel

今天主要说的是UIView和UILabel的属性和应用

首先我将今天讲的方法总结在下面

UIView

1 初始化一个UIView,起始点 从屏幕的左上角(0,0)点 开始计算
UIView *view = [[UIView alloc]initWithFrame:CGRectMake(100, 100, 200, 100)];

2 加背景颜色
view.backgroundColor = [UIColor redColor];

3 添加到window上面,实际上添加进一个数组中
[self.window addSubview:view];

4 取出子视图
NSArray *subView = self.window.subviews;

5 获取中心点(x = frame.origin.x + frame.size.width / 2,y同x)
CGPoint center = view.center;
NSLog(@”%@”,NSStringFromCGPoint(center));

6 更改中心点坐标
view.center = CGPointMake(200, 300);

7 bounds 边界 能够控制子视图的坐标系,默认bounds的起始点 就是从(0,0)开始
改变父视图的bounds 至关于改变子视图的坐标系(也就是原点坐标),父视图是不发生变化 只是更改子视图的位置
view.bounds = CGRectMake(0, 100, 200, 100);

8 添加子视图(必须把子视图添加到父视图的范围以内不然没法交互)
[view addSubview:view1];

视图属性

9 隐藏视图( 若是父视图被隐藏 那么父视图上面全部子视图也会被隐藏)
aView.hidden = NO;// YES为显示 NO为隐藏

10 透明属性 (若是父视图的透明度发生变化 那么上面的全部子视图都会发生变化)
aView.alpha = 0.5

11 取出某一子视图的父视图
UIView *superView = bView.superview;

12 添加一个标签tag值(重点) 给视图加标记 而后能够用viewWithTag取出(不能给0)
aView.tag = 10;
经过tag值取出视图
UIView *tView = [self.window viewWithTag:10];

13 把视图插入到指定的位置
[self.window insertSubview:bView atIndex:0];

14在指定的视图上面添加子视图
[self.window insertSubview:bView aboveSubview:aView];

15 在指定的视图下面添加子视图
[self.window insertSubview:bView belowSubview:aView];

16 把某一个子视图放在最前面
[self.window bringSubviewToFront:aView];

17 把某一个子视图放在最后面
[self.window sendSubviewToBack:aView];

18 交换两个子视图的位置
[self.window exchangeSubviewAtIndex:0 withSubviewAtIndex:1];

19 从父视图上删除
[bView removeFromSuperview];

UILabel

20 显示文本的控件label初始化
UILabel *label = [[UILabel alloc]initWithFrame:CGRectMake(100, 100, 200, 100)];
label.backgroundColor = [UIColor yellowColor];

21 添加字
label.text = @”Application windows are expected to have a root view”;

22 设置字体对齐方式(0: 左对齐 1: 居中 2: 右对齐)
label.textAlignment = 0;

23 设置字体颜色
label.textColor = [UIColor redColor];

24 设置字体字号(大小)
label.font = [UIFont systemFontOfSize:18];

25 获取系统全部安装的字体
NSArray *fontArray = [UIFont familyNames];

26 设置字体类型
label.font = [UIFont fontWithName:@”Apple Color Emoji” size:12];

27 设置阴影颜色
label.shadowColor = [UIColor blackColor];

28 调整阴影的位置 (y正值阴影向下偏 x正值向右偏)
label.shadowOffset = CGSizeMake(0, 15);

29 多行显示
彻底显示 填-1 或者 0;超出范围就没法显示了
label.numberOfLines = 0;

30 设置断行模式
label.lineBreakMode = 5;

UIView例题:

// UIView 表明一个矩形区域
    // 初始化一个UIView
    // 起始点 从屏幕的左上角(0,0)点 开始计算
    UIView *view = [[UIView alloc]initWithFrame:CGRectMake(100, 100, 200, 100)];
    // 加背景颜色
    view.backgroundColor = [UIColor redColor];
    // 添加到window上面
    [self.window addSubview:view];

UILabel例题:(因为没有学习图片 暂时用label代替)

UILabel *movieIconLabel = [[UILabel alloc]initWithFrame:CGRectMake(20, 20, 100, 200)];
    movieIconLabel.backgroundColor = [UIColor grayColor];
    movieIconLabel.text = @"敢死队";
    movieIconLabel.textAlignment = 1;
    [self.window addSubview:movieIconLabel];
    [movieIconLabel release];

    UILabel *ratingLabel = [[UILabel alloc]initWithFrame:CGRectMake(150, 20, 100, 30)];
    ratingLabel.backgroundColor = [UIColor whiteColor];
    ratingLabel.text = @"评分: 7.1";
    [self.window addSubview:ratingLabel];
    [ratingLabel release];

    UILabel *rating_countLabel = [[UILabel alloc]initWithFrame:CGRectMake(270, 20, 100, 30)];
    rating_countLabel.backgroundColor = [UIColor whiteColor];
    rating_countLabel.text = @"(4925评论)";
    [self.window addSubview:rating_countLabel];
    [rating_countLabel release];

    UILabel *dateLabel = [[UILabel alloc]initWithFrame:CGRectMake(150, 60, 100, 30)];
    dateLabel.backgroundColor = [UIColor whiteColor];
    dateLabel.text = @"20140901";
    [self.window addSubview:dateLabel];
    [dateLabel release];

    UILabel *runtimeLabel = [[UILabel alloc]initWithFrame:CGRectMake(150, 110, 100, 30)];
    runtimeLabel.backgroundColor = [UIColor whiteColor];
    runtimeLabel.text = @"126 min";
    [self.window addSubview:runtimeLabel];
    [runtimeLabel release];

    UILabel *genresLabel = [[UILabel alloc]initWithFrame:CGRectMake(150, 160, 150, 30)];
    genresLabel.backgroundColor = [UIColor whiteColor];
    genresLabel.text = @"动做/冒险/惊悚";
    [self.window addSubview:genresLabel];
    [genresLabel release];

    UILabel *countryLabel = [[UILabel alloc]initWithFrame:CGRectMake(150, 200, 100, 30)];
    countryLabel.backgroundColor = [UIColor whiteColor];
    countryLabel.text = @"美国|法国";
    [self.window addSubview:countryLabel];
    [countryLabel release];

    UILabel *makeNameLabel = [[UILabel alloc]initWithFrame:CGRectMake(20, 220, 100, 50)];
    makeNameLabel.backgroundColor = [UIColor whiteColor];
    makeNameLabel.text = @"制做人";
    makeNameLabel.font = [UIFont systemFontOfSize:24];
    [self.window addSubview:makeNameLabel];
    [makeNameLabel release];

    UILabel *actorsLabel = [[UILabel alloc]initWithFrame:CGRectMake(20, 280, 350, 80)];
    actorsLabel.backgroundColor = [UIColor whiteColor];
    actorsLabel.text = @"西尔维斯特•史泰龙 Sylvester Stallone,杰斯•斯坦森 Jason Statham,梅尔•吉布森 MelGibson,李连杰 Jet Li";
    actorsLabel.numberOfLines = 0;
    [self.window addSubview:actorsLabel];
    [actorsLabel release];

    UILabel *moviePlotLabel = [[UILabel alloc]initWithFrame:CGRectMake(20, 350, 150, 40)];
    moviePlotLabel.backgroundColor = [UIColor whiteColor];
    moviePlotLabel.text = @"电影情节";
    moviePlotLabel.font = [UIFont systemFontOfSize:24];
    [self.window addSubview:moviePlotLabel];
    [moviePlotLabel release];

    UILabel *plotLabel = [[UILabel alloc]initWithFrame:CGRectMake(20, 380, 350, 300)];
    plotLabel.backgroundColor = [UIColor whiteColor];
    plotLabel.text = @"在第敢死队3 剧照敢死队3 剧照 (50张)三部的故事中，巴尼（西尔维斯特·史泰龙饰）与克里斯马斯（杰森·斯坦森饰）领衔的敢死队将正面迎战昔日战友、现在的军火枭雄康拉德·斯通班克斯（梅尔·吉布森饰）。斯通班克斯曾侥幸死里逃生过一次，他对敢死队下达了绝杀令巴尼则另有一番打算：为迎战强敌，巴尼决定给敢死队注入新鲜血液，招募了更快更强的高科技战斗新生，搭配长枪硬炮的硬汉前辈，展开一番大决战.";
    plotLabel.numberOfLines = 0;
    [self.window addSubview:plotLabel];
    [plotLabel release];

结果展现: