UI--基础控件

#pragma 视图类 -- UIView    //创建UIView    //创建对象 设置属性    UIView *oneView = [[UIView alloc] init];    //设置背景颜色    oneView.backgroundColor = [UIColor cyanColor];    //设置大小    oneView.frame = CGRectMake(100, 100, 100, 100);    //设置中心点    oneView.center = CGPointMake(100, 100);    //隐藏    oneView.hidden = NO;    //透明度    oneView.alpha = 0.2;    //tag值标记    //通过标记间接访问对应视图    oneView.tag = 1000;    //根据标记获取对象    UIView *tagView = [self.window viewWithTag:1000];    //重置颜色 取随机颜色    //arc4random() % 256 取0~255随机数    //RGB颜色数值为 0 ~ 255    //通过得到的 （随机数 / 255.0）    tagView.backgroundColor = [UIColor colorWithRed:arc4random() % 256 / 255.0 green:arc4random() % 256 / 255.0 blue:arc4random() % 256 / 255.0 alpha: 1];    //添加到父视图上    [self.window addSubview:oneView];    //内存管理    [oneView release];        //获取本视图的子视图    NSLog(@"subViews: %@", self.window.subviews);    //获取本视图的父视图    NSLog(@"superView: %@", oneView.superview);    //打印屏幕尺寸    NSLog(@"%@", NSStringFromCGRect(self.window.frame));        #pragma  UIView 切圆角        //锐角度 -> 添加圆角    //正方形边长 / 2 -> 圆形    oneView.layer.cornerRadius = oneView.frame.size.width / 2;    //边框宽度    oneView.layer.borderWidth = 10;    //边框颜色    oneView.layer.borderColor = [UIColor redColor].CGColor;    

#pragma mark - UILabel标签        //创建对象 设置frame    UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(100, 100, 100, 100)];    label.backgroundColor = [UIColor yellowColor];    [self.window addSubview:label];    [label release];        //设置文本    label.text = @"随便一个字符串";    //文本颜色    label.textColor = [UIColor redColor];    //文本对齐    label.textAlignment = NSTextAlignmentCenter;    //断行模式    //1.换行原则    //2.省略原则    label.lineBreakMode = NSLineBreakByTruncatingMiddle;    //行数    //默认为1行 0 表示不限制行数    label.numberOfLines = 0;    //字体    label.font = [UIFont systemFontOfSize:18];    //阴影颜色    label.shadowColor = [UIColor blackColor];    //阴影偏移量    label.shadowOffset = CGSizeMake(1, 1);

#pragma mark - UITextField输入框        //创建textfield    UITextField *textField = [[UITextField alloc] initWithFrame:CGRectMake(100, 100, 100, 100)];    //设置背景颜色    textField.backgroundColor = [UIColor yellowColor];    //添加到父视图    [self.window addSubview:textField];    //内存管理    [textField release];        //属性    //文本    textField.text = @"panpan";    //占位字符串    textField.placeholder = @"请输入用户名";    //输入控制    //是否可用    textField.enabled = YES;    //安全文本    textField.secureTextEntry = YES;    //开始编辑时清空所有    textField.clearsOnBeginEditing = YES;    //键盘类型    textField.keyboardType = UIKeyboardTypeURL;    //返回按钮类型    textField.returnKeyType = UIReturnKeyJoin;        //输入视图（自定义键盘）    UIView *input = [[UIView alloc] initWithFrame:CGRectMake(100, 100, 100, 100)];    input.backgroundColor = [UIColor redColor];    textField.inputView = input;    //输入辅助视图    textField.inputAccessoryView = input;    [input release];        //外观控制    //边框样式    textField.borderStyle = UITextBorderStyleRoundedRect;    //清除按钮模式    textField.clearButtonMode = UITextFieldViewModeAlways;

#pragma mark - UIButton        //创建对象 button有自己的初始化(不需要release)    UIButton *button = [UIButton buttonWithType:UIButtonTypeSystem];    //设置属性    button.frame = CGRectMake(100, 100, 100, 100);    //设置背景颜色    button.backgroundColor = [UIColor yellowColor];    //添加点击事件    [button addTarget:self action:@selector(buttonClick) forControlEvents:UIControlEventTouchUpInside];    [self.window addSubview:button];        //button属性设置    //设置标题    [button setTitle:@"点我啊" forState:UIControlStateNormal];    //文本颜色    [button setTitleColor:[UIColor yellowColor] forState:UIControlStateNormal];    //设置高亮    [button setTitle:@"高亮" forState:UIControlStateHighlighted];    //设置选中    [button setTitle:@"选中" forState:UIControlStateSelected];    //选中属性    button.selected = YES;       //前景图片    //解决图片不显示的两种方案    //1.system -> custom    //2.改变UIImage读取模式    [button setImage:[[UIImage imageNamed:@"qiaoba"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal] forState:UIControlStateNormal];        //背景图片    [button setBackgroundImage:[UIImage imageNamed:@"qiaoba"] forState:UIControlStateNormal];

#pragma mark - UIImageView（相框）    UIImageView *imgView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 100, 100)];    imgView.backgroundColor = [UIColor redColor];    [self.window addSubview:imgView];    [imgView release];    //设置居中    imgView.center = CGPointMake(self.window.center.x, 100);    //设置圆角    imgView.layer.cornerRadius = imgView.frame.size.width / 2;    imgView.clipsToBounds = YES;    //设置图片    //相对路径(效率低 图片过多时 加载缓慢)    imgView.image = [UIImage imageNamed:@"qiaoba"];    //绝对路径    imgView.image = [UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"qiaoba" ofType:@"png"]];

#pragma mark - 定时器    //定时器 NSTimer    //每隔固定时间间隔 让某个对象执行某个方法    //参数1.时间间隔    //参数2.某个对象    //参数3.某个方法    //参数5.是否重复    [NSTimer scheduledTimerWithTimeInterval:1 target:self selector:@selector(repeat) userInfo:nil repeats:YES];

//定时器- (void)repeat{    NSLog(@"定时器");}//button点击- (void)buttonClick{    NSLog(@"哈哈");    }