UIButton

//    UIButton *btnTest = [[UIButton alloc] initWithFrame:CGRectMake(10,10, 30, 30)];
    UIButton *btnTest = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    btnTest.frame = CGRectMake(50, 50, 50, 30);
    [btnTest setTitle:@"Select" forState:UIControlStateNormal]; //设置选中状态显示的文字
    [btnTest setTitleColor:[UIColor blueColor] forState:UIControlStateNormal]; //设置选中时文字颜色
    [btnTest setEnabled:YES]; //设置是否可以按
    [btnTest setImage:[UIImage imageNamed:@"32.png"] forState:UIControlStateNormal]; //设置选中时的图片
    btnTest.backgroundColor = [UIColor clearColor]; // 清空背景色
    [btnTest setBackgroundImage:[UIImage imageNamed:@"allow.png"] forState:UIControlStateNormal]; //设置背景图片
    btnTest.hidden = NO; //是否隐藏
    btnTest.adjustsImageWhenDisabled = NO; //当按钮被禁用时，按钮颜色会加深，这边设置NO可以消除这个问题
    btnTest.showsTouchWhenHighlighted = YES; //按钮按下时会花光
    [btnTest addTarget:self action:@selector(doTest) forControlEvents:UIControlEventTouchUpInside]; //按下事件
     //获取当前标题
    NSString *btnState = [btnTest titleForState:UIControlStateNormal];
    NSLog(@"++++%@", btnState);
    NSString *btnTitle = btnTest.currentTitle;    
    NSLog(@"++++%@", btnTitle);
   
    UIImage *img = btnTest.currentImage; //获取当前图片
    UIButton *btn = [[UIButton alloc] initWithFrame:CGRectMake(10,10, 30, 30)];
    [btn setImage:img forState:UIControlStateNormal];
    [self.view addSubview:btn];