3

我的 iPhone 应用程序中有一个分段控件，它在 ios6 上运行良好，但在 ios7 上，分段图块被截断（文本有足够的空间，但无论如何它都会截断它们）

    self.segmentedControl.segmentedControlStyle = UISegmentedControlStyleBar;
self.segmentedControl.autoresizingMask = UIViewAutoresizingFlexibleWidth;
NSDictionary *defaultTextAttributes = [NSDictionary dictionaryWithObjectsAndKeys:defaultFont,
                                       UITextAttributeFont,
                                       defaultFontColor,
                                       UITextAttributeTextColor,
                                       nil];
[self.segmentedControl setTitleTextAttributes:defaultTextAttributes forState:UIControlStateNormal];

NSDictionary *selectedTextAttributes = [NSDictionary dictionaryWithObjectsAndKeys:selectedFont,
                                        UITextAttributeFont,
                                        selectedFontColor,
                                        UITextAttributeTextColor,
                                        nil];
[self.segmentedControl setTitleTextAttributes:selectedTextAttributes forState:UIControlStateHighlighted];

有关如何解决此问题的任何建议？为什么它可以在 ios6 上正常工作但在 ios7 上截断标题...

这是导致问题的代码...

      UIImage *unselectedBackgroundImage = [[UIImage imageNamed:@"product_details_segmentBckg"] resizableImageWithCapInsets:UIEdgeInsetsMake(1, 1, 1, 1)];
    /* Selected background */
    UIImage *selectedBackgroundImage = [[UIImage imageNamed:@"product_details_segmentBckg"] resizableImageWithCapInsets:UIEdgeInsetsMake(1, 1, 1, 1)];
    /* Image between two unselected segments */
    UIImage *bothUnselectedImage = [[UIImage imageNamed:@"product_details_segmentBckg"] resizableImageWithCapInsets:UIEdgeInsetsMake(1, 0, 1, 0)];
     /* Image between segment selected on the left and unselected on the right */
    UIImage *leftSelectedImage = [[UIImage imageNamed:@"product_details_segmentBckg"] resizableImageWithCapInsets:UIEdgeInsetsMake(1, 0, 1, 0)];
    /* Image between segment selected on the right and unselected on the right */
    UIImage *rightSelectedImage = [[UIImage imageNamed:@"product_details_segmentBckg"] resizableImageWithCapInsets:UIEdgeInsetsMake(1, 0, 1, 0)];

    if ([UIImage instancesRespondToSelector:@selector(imageWithRenderingMode:)]) {
#ifdef __IPHONE_7_0
        unselectedBackgroundImage = [unselectedBackgroundImage imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
        selectedBackgroundImage = [selectedBackgroundImage imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
        bothUnselectedImage = [bothUnselectedImage imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
        leftSelectedImage = [leftSelectedImage imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
        rightSelectedImage = [rightSelectedImage imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];
#endif
    }


    [[UISegmentedControl appearance] setBackgroundImage:unselectedBackgroundImage
                                               forState:UIControlStateNormal
                                             barMetrics:UIBarMetricsDefault];

    [[UISegmentedControl appearance] setBackgroundImage:selectedBackgroundImage
                                               forState:UIControlStateSelected
                                             barMetrics:UIBarMetricsDefault];

    [[UISegmentedControl appearance] setDividerImage:bothUnselectedImage
                                 forLeftSegmentState:UIControlStateNormal
                                   rightSegmentState:UIControlStateNormal
                                          barMetrics:UIBarMetricsDefault];

    [[UISegmentedControl appearance] setDividerImage:leftSelectedImage
                                 forLeftSegmentState:UIControlStateSelected
                                   rightSegmentState:UIControlStateNormal
                                          barMetrics:UIBarMetricsDefault];

    [[UISegmentedControl appearance] setDividerImage:rightSelectedImage
                                 forLeftSegmentState:UIControlStateNormal
                                   rightSegmentState:UIControlStateSelected
                                          barMetrics:UIBarMetricsDefault];

如果我将其注释掉，标签会显示得很好......但我需要背景图片......那么我如何保持 ios6 兼容性，同时在 ios7 上拥有自定义分段控制

4

4 回答 4

2

我通过为正常状态和选定状态设置相同的标题文本属性来解决这个问题。在 iOS 6 中这已经足够了：

NSMutableDictionary *attributes = [NSMutableDictionary dictionaryWithObjectsAndKeys:
                                   someUIFont, UITextAttributeFont,
                                   nil];

[self.segmentedControl setTitleTextAttributes:attributes forState:UIControlStateNormal];

现在我必须添加它以使其适用于 iOS 7：

[self.segmentedControl setTitleTextAttributes:attributes forState:UIControlStateSelected];
于 2013-10-04T11:11:49.973 回答
1

经过一番研究，这是我对这个问题的解决方案（Swift 3，iOS 10）

class CustomSegmentedControl: UISegmentedControl {

override func draw(_ rect: CGRect) {

    for segment in subviews {
        for subview in segment.subviews {
            if let segmentLabel = subview as? UILabel {
                segmentLabel.numberOfLines = 0
                segmentLabel.translatesAutoresizingMaskIntoConstraints = false
                segmentLabel.leadingAnchor.constraint(equalTo: segment.leadingAnchor).isActive = true
                segmentLabel.trailingAnchor.constraint(equalTo: segment.trailingAnchor).isActive = true
                segmentLabel.topAnchor.constraint(equalTo: segment.topAnchor).isActive = true
                segmentLabel.bottomAnchor.constraint(equalTo: segment.bottomAnchor).isActive = true
            }
        }
    }
}

override func didMoveToSuperview() {
    self.layer.cornerRadius = 5
    self.clipsToBounds = true
    self.backgroundColor = .white
    self.tintColor = UIColor.orange

    let font = UIFont(name: "Helvetica", size: 12.0)
    self.setTitleTextAttributes([NSFontAttributeName: font!], for: .normal)

    let fontBold = UIFont(name: "Helvetica-Bold", size: 12.0)
    self.setTitleTextAttributes([NSFontAttributeName: fontBold!], for: .selected)
}
}
于 2017-05-17T11:49:41.650 回答
0

我尝试了一些解决方案来避免重新计算所有段大小。
为了解决我的问题，我将此代码放在valueChange分段控件的操作上：

for(int i=0;i<setControl.subviews.count; i++){
  NSString *title=[segControl titleForSegmentAtIndex:i];
  [segControl setTitle:title forSegmentAtIndex:i];
}

问题发生在为 iOS6 编译的应用程序（使用 Xcode 4.6.3）上，该应用程序在 iOS7 上运行。该故障在应用程序从暂停状态重新激活后可见，但并非在所有视图中都可见。

于 2013-11-06T21:22:59.310 回答
0

我正在更新标题，但由于原始标题的长度小于新标题，因此它被截断了。因此，我在原始标题的文本中添加了永久不间断空格\u{00a0}，以便匹配前后标题的长度。

于 2020-01-03T21:45:12.347 回答