Question

我有UISegmentedControl，我正在尝试设置分频器图像。图像为黑色，宽约2px。

UIImage *divider = [UIImage imageNamed:@"ZSDivider.png"];
[self.segmentedControl setDividerImage:divider forLeftSegmentState:UIControlStateNormal rightSegmentState:UIControlStateNormal barMetrics:UIBarMetricsDefault];
[self.segmentedControl setDividerImage:divider forLeftSegmentState:UIControlStateSelected rightSegmentState:UIControlStateNormal barMetrics:UIBarMetricsDefault];
[self.segmentedControl setDividerImage:divider forLeftSegmentState:UIControlStateNormal rightSegmentState:UIControlStateSelected barMetrics:UIBarMetricsDefault];

我不希望分频器看起来像什么，只是每个州的黑线，但它根本没有出现。

任何想法我做错了什么？

Answer 1

分割器图像的高度与分割控件的高度相同吗？如果我没记错，如果分隔符与控制高度不匹配，UISegmentedControl会出现问题。

Answer 2

您是否确定“divider”和“self.segmentedControl”不为空？

这看起来是错误检查的绝佳机会：

UIImage *divider = [UIImage imageNamed:@"ZSDivider"];
if(divider)
{
    if(self.segmentedControl)
    {
        [self.segmentedControl setDividerImage:divider forLeftSegmentState:UIControlStateNormal rightSegmentState:UIControlStateNormal barMetrics:UIBarMetricsDefault];
        [self.segmentedControl setDividerImage:divider forLeftSegmentState:UIControlStateSelected rightSegmentState:UIControlStateNormal barMetrics:UIBarMetricsDefault];
        [self.segmentedControl setDividerImage:divider forLeftSegmentState:UIControlStateNormal rightSegmentState:UIControlStateSelected barMetrics:UIBarMetricsDefault];
    } else {
        NSLog( @"segmentedControl is NULL");
    }
} else {
    NSLog( @"divider image is NULL");
}

UISegmentedControl分割器图像未显示

2 个答案: