Custom UIButton

UIButton *Btn;

CGRect frame;

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;//设置按钮的表示

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;

frame.origin.y =260;//设置按钮的位置

[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}