UI初级 Label

UILabel的部分常用属性

//TODO:UILabel
    CGFloat nameLabelX = 50;
    CGFloat nameLabelY = 200;
    CGFloat nameLabelW = 80;
    CGFloat nameLabelH = 40;
    
    UILabel *nameLabel = [[UILabel alloc] initWithFrame:CGRectMake(nameLabelX, nameLabelY, nameLabelW, nameLabelH)];
    nameLabel.backgroundColor = [UIColor cyanColor];
    
    //设置文本显示的字
    nameLabel.text = @"用户名";
    
    //设置文本居中
    nameLabel.textAlignment = NSTextAlignmentCenter; //居中
    
    //将nameLabel添加到window 视图上
    [self.window addSubview:nameLabel];
    
    //创建pswLabel对象,并设置frame
    UILabel *pswLabel = [[UILabel alloc] initWithFrame:CGRectMake(nameLabelX, nameLabelY + 50, nameLabelW, nameLabelH)];
    
    pswLabel.backgroundColor = [UIColor cyanColor];
    
    pswLabel.text = @"密码";
    
    pswLabel.textAlignment = NSTextAlignmentCenter;
    
    [self.window addSubview:pswLabel];
    
    //用户名后面的label
    UILabel *nameBackLabel = [[UILabel alloc] initWithFrame:CGRectMake(nameLabelX + 90, nameLabelY, nameLabelW + 100, nameLabelH)];
    
    nameBackLabel.backgroundColor = [UIColor yellowColor];
    
    nameBackLabel.text = @"请输入用户名";
    
    nameBackLabel.textAlignment = NSTextAlignmentCenter;
    
    [self.window addSubview:nameBackLabel];
    
    //密码后面的label
    UILabel *pswBackLabel = [[UILabel alloc] initWithFrame:CGRectMake(nameLabelX + 90, nameLabelY + 50, nameLabelW + 100, nameLabelH)];
    
    pswBackLabel.backgroundColor = [UIColor yellowColor];
    
    pswBackLabel.text = @"请输入密码";
    
    pswBackLabel.textAlignment = NSTextAlignmentCenter;
    
    [self.window addSubview:pswBackLabel];

当然还有一些美化的属性代码

//label边角变圆
    pswBackLabel.layer.cornerRadius = 20;
    //边框颜色
    pswBackLabel.layer.borderColor = [UIColor redColor].CGColor;
    //边框宽度
    pswBackLabel.layer.borderWidth = 5;
    //label显示内容的行数 0代表没有限制,其他数几就是几行
    pswBackLabel.numberOfLines = 0;

恩,大致常用的就这些了,还有想加的属性的话可以百度搜,有许多大神会发,学无止境