ios - 如何使用 switch 语句更改 UIButton 的图像？

Question

我能够向数组中的 UIButton 添加“setbackgroundimage”。现在所有按钮都具有相同的图像。如何创建 switch 语句以便能够为我的 NSarray 中的每个 initwithobjects @""设置不同的图像？

下面是我使用的代码:

 menuItems = [[NSArray alloc]initWithObjects:@"",@"",@"",@"",@"",@"",@"", nil];
    for (int b=0;b<[menuItems count];b++) {

        UIButton *mybutton = [[UIButton alloc]initWithFrame:CGRectMake(3.0f, originofButtons, buttonWidth, buttonHeight)];
        //mybutton.backgroundColor = [UIColor redColor];
        [mybutton setBackgroundImage:[UIImage imageNamed:@"menubutton.png"]
         forState:UIControlStateNormal];
        [mybutton setTag:b];
        [mybutton setTitle:[menuItems objectAtIndex:b] forState:UIControlStateNormal];
        [mybutton setSelected:false];
        [mybutton addTarget:self action:@selector(buttonpress:) forControlEvents:UIControlEventTouchUpInside];

        [m_scrollview addSubview:mybutton];

        originofButtons += (buttonHeight + buttonseparator); 
        }

Answer 1

设置选中图片:

[mybutton setBackgroundImage:[UIImage imageNamed:@"YOUR_SELECTED_IMG.png"] forState:UIControlStateSelected];

虽然你想设置不同的每个，你可以链接 tag 。

switch (myButton.tag) {
        case 0:
            [mybutton setBackgroundImage:[UIImage imageNamed:@"YOUR_SELECTED_IMG.png"] forState:UIControlStateSelected];
            break;
        case 1:
            [mybutton setBackgroundImage:[UIImage imageNamed:@"YOUR_SELECTED_IMG.png"] forState:UIControlStateSelected];
            break;
    }