IOS学习笔记---UIKit之UILable

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UILable:是UIKit中的只读可视化控件,一般用于显示用户信息,不做动作响应.通过代码学习UILable使用:

- (void)viewDidLoad{    [superviewDidLoad];    //1.实例化leble对象   UILabel *lable = [[UILabelalloc]initWithFrame:CGRectMake(70,100,120, 150)];    //2.设置属性    [lable setBackgroundColor:[UIColoryellowColor]];//设置颜色    [lable setText:@"hello dragon-yeah , i am happy,i am happyi am happyi am happyi am happyi am happy"];    [lable setTextAlignment:NSTextAlignmentCenter];    [lable setTextColor:[UIColormagentaColor]];    [lable setNumberOfLines:3];//多少行    //[lable setShadowColor:[UIColor redColor]];//阴影    //[lable setShadowOffset:CGSizeMake(4, 4)];//设置偏移量        [lable setUserInteractionEnabled:YES];//设置用户交互    [lablesetTag:1];//设置标识视图       for (int i =0 ; i < 5; i++) {       UILabel *lable= [[UILabelalloc]initWithFrame:CGRectMake(10+60*i,250, 50, 50)];        [self.viewaddSubview:lable];//会让引用计数加1        [lablesetTag:i];        [lablerelease];        [lablesetText:@"lab544564544"];       NSLog(@"%d",[lableretainCount]);    }   UILabel * lab = (UILabel *)[self.viewviewWithTag:2];    [labsetText:@"hello"];        //设置字体    [lable setAdjustsFontSizeToFitWidth:YES];    [lable setFont:[UIFontsystemFontOfSize:20]];//设置字体大小    [lable setFont:[UIFontfontWithName:@"Arial"size:12]];//设置字体样式        //3.添加到根视图    [self.viewaddSubview:lable];    }

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