摘要：
1.UI书写：一个小练习图片如下：代码如下：@implementationAppDelegate{UIControl*control;UILabel*label;} label= [[UILabelalloc]initWithFrame:CGRectMake(10,50,300,50)];control= [[UIControlalloc]initWithFrame:CGRectMake(10,50,300,50)];label.backgroundColor= [UIColorclearColor];label.text=@"按我呀、好爽！";label.textColo 阅读全文
