UI控件——自定义按钮

CGRect frame;       
UIButton *Btn = [[UIButton buttonWithType:UIButtonTypeCustom] retain]; //按钮的类型
[Btn setImage:[UIImage imageNamed:@“aaa.png”] forState:UIControlStateNormal];//设置按钮图片
Btn.tag = 10; 
frame.size.width = 59;  //设置按钮的宽度
frame.size.height = 59;   //设置按钮的高度
frame.origin.x =150;   //设置按钮的位置
frame.origin.y =260;
[Btn setFrame:frame];
[Btn setBackgroundColor:[UIColor clearColor]];
[Btn addTarget:self action:@selector(btnPressed:)forControlEvents:UIControlEventTouchUpInside];   //按钮的单击事件
[self.view addSubview:Btn];      
[Btn release];


-(void)btnPressed:(id)sender {
    //在这里实现按钮的单击事件
}