iPhone 按钮选择状态

Question

我创建了两个彼此相邻的按钮来模拟分段控件。我这样做是为了自定义超出 UIKit 允许范围的外观。我决定使用 selected 属性来保持按下按钮。我有两张图片，一张分别代表正常状态​​和选中状态。

问题是，当我选择一个按钮时，由于高亮状态，该按钮会高亮并变暗。我决定也将所选图像用于突出显示状态，但它闪烁，任何想法或建议。

- (void)leftSegmentPressed:(id)sender
{
    if ([sender isSelected]) {
        [sender setSelected:NO];
    }
    else {
        [sender setSelected:YES];
    }
}

Answer 1

对于“已选中”按钮，将其禁用并手动切换状态的图像。

- (void) viewDidLoad
{
    [rightSegmentButton setImage:[UIImage imageNamed:@"unselected.png"] forState:UIControlStateNormal];
    [rightSegmentButton setImage:[UIImage imageNamed:@"selected.png"] forState:UIControlStateDisabled];
    [leftSegmentButton setImage:[UIImage imageNamed:@"unselected.png"] forState:UIControlStateNormal];
    [leftSegmentButton setImage:[UIImage imageNamed:@"selected.png"] forState:UIControlStateDisabled];
}

- (void)leftSegmentPressed:(id)sender
{
    sender.enabled = NO;
    rightSegmentButton.enabled = YES;
}

- (void)rightSegmentPressed:(id)sender
{
    sender.enabled = NO;
    leftSegmentButton.enabled = YES;
}