自左和右UISegmentedControl按钮(Customizing Left & Right

我想自定义以下分段控制，使用左图像的第一个按钮和第二个按钮右图像。我将如何做到这一点使用UIAppearance？

我想改变以下segmentedControl：

类似的像下面的内容：

我想用一个自定义图像的原因是，这样我可以改变按钮的角落。如果你看一下蓝分段控制，它更平方（我的形象有它自己的角落）。

我在想这样的事情，但没有用：

UIImage *leftImage = [[UIImage imageNamed:@"leftControl.png"] resizableImageWithCapInsets:UIEdgeInsetsMake(0, 15, 0, 15)];
UIImage *rightImage = [[UIImage imageNamed:@"rightControl.png"] resizableImageWithCapInsets:UIEdgeInsetsMake(0, 15, 0, 15)];

[[UISegmentedControl appearance] setBackgroundImage:leftImage forState:UIControlStateNormal barMetrics:UIBarMetricsDefault ];
[[UISegmentedControl appearance] setBackgroundImage:rightImage forState:UIControlStateNormal barMetrics:UIBarMetricsDefault];

Answer 1:

您需要提供以下图片：

选择的段的背景（这左和右罩）
段未被选择的背景（这左和右罩）
段中间，左边选中，未选择权
段中，未被勾选的状态，选择权
段中间，无论左，右选择
段中，无论是左，右未选择

然后使用下面的代码来设置：

/* Unselected background */
UIImage *unselectedBackgroundImage = [[UIImage imageNamed:@"segment_background_unselected"] resizableImageWithCapInsets:UIEdgeInsetsMake(10, 10, 10, 10)];
[[UISegmentedControl appearance] setBackgroundImage:unselectedBackgroundImage
                                           forState:UIControlStateNormal
                                         barMetrics:UIBarMetricsDefault];

/* Selected background */
UIImage *selectedBackgroundImage = [[UIImage imageNamed:@"segment_background_selected"] resizableImageWithCapInsets:UIEdgeInsetsMake(10, 10, 10, 10)];
[[UISegmentedControl appearance] setBackgroundImage:selectedBackgroundImage
                                           forState:UIControlStateSelected
                                         barMetrics:UIBarMetricsDefault];

/* Image between two unselected segments */
UIImage *bothUnselectedImage = [[UIImage imageNamed:@"segment_middle_unselected"] resizableImageWithCapInsets:UIEdgeInsetsMake(15, 0, 15, 0)];
[[UISegmentedControl appearance] setDividerImage:bothUnselectedImage
                             forLeftSegmentState:UIControlStateNormal
                               rightSegmentState:UIControlStateNormal
                                      barMetrics:UIBarMetricsDefault];

/* Image between segment selected on the left and unselected on the right */
UIImage *leftSelectedImage = [[UIImage imageNamed:@"segment_middle_left_selected"] resizableImageWithCapInsets:UIEdgeInsetsMake(15, 0, 15, 0)];
[[UISegmentedControl appearance] setDividerImage:leftSelectedImage
                             forLeftSegmentState:UIControlStateSelected
                               rightSegmentState:UIControlStateNormal
                                      barMetrics:UIBarMetricsDefault];

/* Image between segment selected on the right and unselected on the left */
UIImage *rightSelectedImage = [[UIImage imageNamed:@"segment_middle_right_selected"] resizableImageWithCapInsets:UIEdgeInsetsMake(15, 0, 15, 0)];
[[UISegmentedControl appearance] setDividerImage:rightSelectedImage
                             forLeftSegmentState:UIControlStateNormal
                               rightSegmentState:UIControlStateSelected
                                      barMetrics:UIBarMetricsDefault];

请注意，您必须在拉伸图像调整帽大小，以匹配您的图像。

Answer 2:

莫里吉奥的答案并不太适合我用的工具栏内的分段控制工作; 它一直显示在自分频器图像还不够宽的控制这些虚线。

所以我做了我自己。这里是所有的图像，你将需要Xcode和我也投入了Photoshop文件创建分段控制图像，以便您可以更改样式：

https://s3.amazonaws.com/iwasrobbed/stackoverflow/Custom+Segmented+Control.zip

把这个在您的AppDelegate有它改变外观，使用工具条中的所有分段控制的附加图片，：

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    [self customizeAppAppearance];
}

- (void)customizeAppAppearance
{
    // Toolbar
    [[UIToolbar appearance] setBackgroundImage:[[UIImage imageNamed:@"toolbar.png"] resizableImageWithCapInsets:UIEdgeInsetsMake(22, 5, 22, 5)] forToolbarPosition:UIToolbarPositionAny barMetrics:UIBarMetricsDefault];

    // Segmented Controls within Toolbars

    // Unselected background
    UIImage *unselectedBackgroundImage = [[UIImage imageNamed:@"segmentInactive.png"] resizableImageWithCapInsets:UIEdgeInsetsMake(15, 15, 15, 15)];
    [[UISegmentedControl appearanceWhenContainedIn:[UIToolbar class], nil] setBackgroundImage:unselectedBackgroundImage
                                                                                     forState:UIControlStateNormal
                                                                                   barMetrics:UIBarMetricsDefault];

    // Selected background
    UIImage *selectedBackgroundImage = [[UIImage imageNamed:@"segmentActive.png"] resizableImageWithCapInsets:UIEdgeInsetsMake(15, 15, 15, 15)];
    [[UISegmentedControl appearanceWhenContainedIn:[UIToolbar class], nil] setBackgroundImage:selectedBackgroundImage
                                                                                     forState:UIControlStateSelected
                                                                                   barMetrics:UIBarMetricsDefault];

    // Image between two unselected segments
    UIImage *bothUnselectedImage = [[UIImage imageNamed:@"segmentBothInactive.png"] resizableImageWithCapInsets:UIEdgeInsetsMake(15, 10, 15, 10)];
    [[UISegmentedControl appearanceWhenContainedIn:[UIToolbar class], nil] setDividerImage:bothUnselectedImage
                                                                       forLeftSegmentState:UIControlStateNormal
                                                                         rightSegmentState:UIControlStateNormal
                                                                                barMetrics:UIBarMetricsDefault];

    // Image between segment selected on the left and unselected on the right
    UIImage *leftSelectedImage = [[UIImage imageNamed:@"segmentLeftActiveRightInactive.png"] resizableImageWithCapInsets:UIEdgeInsetsMake(15, 0, 15, 0)];
    [[UISegmentedControl appearanceWhenContainedIn:[UIToolbar class], nil] setDividerImage:leftSelectedImage
                                                                       forLeftSegmentState:UIControlStateSelected
                                                                         rightSegmentState:UIControlStateNormal
                                                                                barMetrics:UIBarMetricsDefault];

    // Image between segment selected on the right and unselected on the left
    UIImage *rightSelectedImage = [[UIImage imageNamed:@"segmentRightActiveLeftInactive.png"] resizableImageWithCapInsets:UIEdgeInsetsMake(15, 0, 15, 0)];
    [[UISegmentedControl appearanceWhenContainedIn:[UIToolbar class], nil] setDividerImage:rightSelectedImage
                                                                       forLeftSegmentState:UIControlStateNormal
                                                                         rightSegmentState:UIControlStateSelected
                                                                                barMetrics:UIBarMetricsDefault];
}

Answer 3:

你需要做一个背景图片，为您的所有部分，也就是只需一个按钮，左侧边缘，也就是两个按钮之间的连接的图像，这是正确的边缘图像的图像。他们有些需要多个州做。因此，这里是你的图像列表：

左盖，选择
左盖，未选择
段的背景下，选择
段的背景下，未选择
右盖，选择
右盖，未选择
中盖，左向右选择未选择
中盖，未被勾选的状态，选择权
中盖，两者选择
中盖，都未被选择

对于中盖，你可以把它们放在这样的：（文本从苹果文档）。

// Image between two unselected segments.
[mySegmentedControl setDividerImage:image1 forLeftSegmentState:UIControlStateNormal
              rightSegmentState:UIControlStateNormal barMetrics:barMetrics];
// Image between segment selected on the left and unselected on the right.
[mySegmentedControl setDividerImage:image1 forLeftSegmentState:UIControlStateSelected
              rightSegmentState:UIControlStateNormal barMetrics:barMetrics];
// Image between segment selected on the right and unselected on the right.
[mySegmentedControl setDividerImage:image1 forLeftSegmentState:UIControlStateNormal
              rightSegmentState:UIControlStateSelected barMetrics:barMetrics];

如果您使用UIAppearance ，显然你会发送这些消息的外观代理。

文章来源: Customizing Left & Right UISegmentedControl Buttons