【发布时间】:2012-03-08 01:35:36
【问题描述】:
有没有办法完全删除分隔 UISegmentedControl 中两个段的线?
设置segmentedControlStyle 没有帮助。
【问题讨论】:
有没有办法完全删除分隔 UISegmentedControl 中两个段的线?
设置segmentedControlStyle 没有帮助。
【问题讨论】:
不,没有。您应该考虑手动创建 UISegmentedControl 功能。也许使用两个 UIButtons。
【讨论】:
使用此方法更改您的分段分隔线图像:
[segmentControl setDividerImage:dividerimg
forLeftSegmentState:UIControlStateNormal
rightSegmentState:UIControlStateNormal
barMetrics:UIBarMetricsDefault];
【讨论】:
我在 iOS7 中使用了segmentcontrol.tintColor = [UIColor clearColor];,它似乎可以工作。
【讨论】:
setTitleTextAttributes 并为每个正常、突出显示和选定状态传递带有颜色的字体属性,这是一个很好的解决方案。
以下代码将完全符合您的要求。
UIGraphicsBeginImageContextWithOptions(CGSizeMake(1, self.segControlOut.frame.size.height), NO, 0.0);
UIImage *blank = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
[self.segControlOut setDividerImage:blank
forLeftSegmentState:UIControlStateNormal
rightSegmentState:UIControlStateNormal
barMetrics:UIBarMetricsDefault];
【讨论】:
[UIImage new]。
您可以通过设置黑色图像从 UISegmentedControl 中移除所有背景、边框和分隔符。或者您可以设置自定义颜色。
以下示例删除所有边框/分隔符,并将背景设置为 0.2 alpha 的白色,并将选定的段设置为 alpha 1.0 的白色
[self.segmentedControl setBackgroundImage:[self imageWithColor:[UIColor colorWithWhite:1.0 alpha:0.2]] forState:UIControlStateNormal barMetrics:UIBarMetricsDefault];
[self.segmentedControl setBackgroundImage:[self imageWithColor:[UIColor colorWithWhite:1.0 alpha:1.0]] forState:UIControlStateSelected barMetrics:UIBarMetricsDefault];
- (UIImage *)imageWithColor:(UIColor *)color {
CGRect rect = CGRectMake(0.0f, 0.0f, 1.0f, 1.0f);
UIGraphicsBeginImageContext(rect.size);
CGContextRef context = UIGraphicsGetCurrentContext();
CGContextSetFillColorWithColor(context, [color CGColor]);
CGContextFillRect(context, rect);
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return image;
}
【讨论】:
我将之前的答案组合成一个 Swift 扩展。
我想删除所有边框和分隔线。此代码仅使用正常的段颜色,例如选择/取消选择的色调和背景。
打电话
segmentedControl.removeBorders()
这是扩展名
extension UISegmentedControl {
func removeBorders() {
setBackgroundImage(imageWithColor(backgroundColor!), forState: .Normal, barMetrics: .Default)
setBackgroundImage(imageWithColor(tintColor!), forState: .Selected, barMetrics: .Default)
setDividerImage(imageWithColor(UIColor.clearColor()), forLeftSegmentState: .Normal, rightSegmentState: .Normal, barMetrics: .Default)
}
// create a 1x1 image with this color
private func imageWithColor(color: UIColor) -> UIImage {
let rect = CGRectMake(0.0, 0.0, 1.0, 1.0)
UIGraphicsBeginImageContext(rect.size)
let context = UIGraphicsGetCurrentContext()
CGContextSetFillColorWithColor(context, color.CGColor);
CGContextFillRect(context, rect);
let image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return image
}
}
【讨论】:
backgroundColor! 和tintColor!,否则在展开时您可能会发现 nil。否则,太棒了!
@naveed 和 @Jon Setting 的回答拯救了我的一天!
但作为一个完美主义者,我很沮丧地发现这段代码还在控件的外边界留下了漏洞:
完整的代码是
CGFloat h = self.segControlOut.frame.size.height;
UIGraphicsBeginImageContextWithOptions(CGSizeMake(1, h), NO, 0.0);
// draw the missing dots with the control border color
[self.segControlOut.tintColor set];
UIRectFrame( CGRectMake(0, -1, 1, 2.5) );
UIRectFrame( CGRectMake(0, h-1.5, 1, 2.5) );
UIImage *blank = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
[self.segControlOut setDividerImage:blank
forLeftSegmentState:UIControlStateNormal
rightSegmentState:UIControlStateNormal
barMetrics:UIBarMetricsDefault];
【讨论】:
如果有人想要这种UISegmentedControl View-
已编辑:- Swift 3.0 扩展
extension UISegmentedControl {
func customizeAppearance(for height: Int) {
setTitleTextAttributes([NSFontAttributeName:UIFont(name:"Helvetica Neue", size:13.0)!,NSForegroundColorAttributeName:UIColor.white], for:.normal)
setTitleTextAttributes([NSFontAttributeName:UIFont(name:"Helvetica Neue", size:13.0)!,NSForegroundColorAttributeName:UIColor.white], for:.selected)
setDividerImage(UIImage().colored(with: .clear, size: CGSize(width: 1, height: height)), forLeftSegmentState: .normal, rightSegmentState: .normal, barMetrics: .default)
setBackgroundImage(UIImage().colored(with: .clear, size: CGSize(width: 1, height: height)), for: .normal, barMetrics: .default)
setBackgroundImage(UIImage().colored(with: UIColor.init(red: 215/255.0, green: 0.0, blue: 30/255.0, alpha: 1.0), size: CGSize(width: 1, height: height)), for: .selected, barMetrics: .default);
for borderview in subviews {
let upperBorder: CALayer = CALayer()
upperBorder.backgroundColor = UIColor.init(red: 215/255.0, green: 0.0, blue: 30/255.0, alpha: 1.0).cgColor
upperBorder.frame = CGRect(x: 0, y: borderview.frame.size.height-1, width: borderview.frame.size.width, height: 1)
borderview.layer.addSublayer(upperBorder)
}
}
}
extension UIImage {
func colored(with color: UIColor, size: CGSize) -> UIImage {
UIGraphicsBeginImageContext(size)
let context = UIGraphicsGetCurrentContext()
context!.setFillColor(color.cgColor);
let rect = CGRect(origin: CGPoint(x: 0, y: 0), size: size)
context!.fill(rect);
let image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return image!
}
}
UIImage 扩展生成具有所需大小的彩色图像。
在customizeAppearance 中强制使用height 参数可避免在构建context 时出现任何崩溃。
您可以通过提取每个自定义属性并将其作为函数的参数来使其更加可重用;)
这是示例代码,在 iOS 9 上进行了测试,对我来说运行良好。
在viewDidLoad中添加这几行代码-
[yourSegmentControl setTitleTextAttributes:@{ NSFontAttributeName:[UIFont fontWithName:@"Roboto-black" size:13.0],NSForegroundColorAttributeName:[UIColor whiteColor] }forState:UIControlStateSelected];
[yourSegmentControl setTitleTextAttributes:@{ NSFontAttributeName:[UIFont fontWithName:@"Roboto-black" size:13.0],NSForegroundColorAttributeName:[UIColor whiteColor] }forState:UIControlStateNormal];
[yourSegmentControl setDividerImage:[self imageWithColor:[UIColor clearColor]] forLeftSegmentState:UIControlStateNormal rightSegmentState:UIControlStateNormal barMetrics:UIBarMetricsDefault];
[yourSegmentControl setBackgroundImage:[self imageWithColor:[UIColor clearColor]] forState:UIControlStateNormal barMetrics:UIBarMetricsDefault];
[yourSegmentControl setBackgroundImage:[self imageWithColor:[UIColor colorWithRed:215/255.0 green:0 blue:30/255.0 alpha:1.0]] forState:UIControlStateSelected barMetrics:UIBarMetricsDefault];
for (UIView *borderview in yourSegmentControl.subviews) {
CALayer *upperBorder = [CALayer layer];
upperBorder.backgroundColor = [UIColor colorWithRed:215/255.0 green:0 blue:30/255.0 alpha:1.0].CGColor;
upperBorder.frame = CGRectMake(0, borderview.frame.size.height-1, borderview.frame.size.width, 1.0f);
[borderview.layer addSublayer:upperBorder];
}
和
- (UIImage *)imageWithColor:(UIColor *)color {
CGRect rect = CGRectMake(0.0f, 0.0f, 1.0f, 1.0f);
UIGraphicsBeginImageContext(rect.size);
CGContextRef context = UIGraphicsGetCurrentContext();
CGContextSetFillColorWithColor(context, [color CGColor]);
CGContextFillRect(context, rect);
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return image;
}
这是在 Swift 中实现相同视图的 Swift 扩展-
yourSegmentControl.setTitleTextAttributes([NSFontAttributeName:UIFont(name:"Helvetica Neue", size:13.0)!,NSForegroundColorAttributeName:UIColor.whiteColor()], forState:UIControlState.Normal)
yourSegmentControl.setTitleTextAttributes([NSFontAttributeName:UIFont(name:"Helvetica Neue", size:13.0)!,NSForegroundColorAttributeName:UIColor.whiteColor()], forState:UIControlState.Selected)
yourSegmentControl.setDividerImage(self.imageWithColor(UIColor.clearColor()), forLeftSegmentState: UIControlState.Normal, rightSegmentState: UIControlState.Normal, barMetrics: UIBarMetrics.Default)
yourSegmentControl.setBackgroundImage(self.imageWithColor(UIColor.clearColor()), forState:UIControlState.Normal, barMetrics:UIBarMetrics.Default)
yourSegmentControl.setBackgroundImage(self.imageWithColor(UIColor.init(red: 215/255.0, green: 0.0, blue: 30/255.0, alpha:1.0)), forState:UIControlState.Selected, barMetrics:UIBarMetrics.Default);
for borderview in yourSegmentControl.subviews {
let upperBorder: CALayer = CALayer()
upperBorder.backgroundColor = UIColor.init(red: 215/255.0, green: 0.0, blue: 30/255.0, alpha: 1.0).CGColor
upperBorder.frame = CGRectMake(0, borderview.frame.size.height-1, borderview.frame.size.width, 1.0);
borderview.layer .addSublayer(upperBorder);
}
和
func imageWithColor(color: UIColor) -> UIImage {
let rect = CGRectMake(0.0, 0.0, 1.0, yourSegmentControl.frame.size.height)
UIGraphicsBeginImageContext(rect.size)
let context = UIGraphicsGetCurrentContext()
CGContextSetFillColorWithColor(context, color.CGColor);
CGContextFillRect(context, rect);
let image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return image
}
【讨论】:
- (void) configSegmentControl {
[segmentControl setBackgroundImage:[self imageWithColor:[UIColor blueColor]] forState:UIControlStateNormal barMetrics:UIBarMetricsDefault];
[segmentControl setBackgroundImage:[self imageWithColor:[UIColor redColor]] forState:UIControlStateSelected barMetrics:UIBarMetricsDefault];
segmentControl.layer.cornerRadius = 4.0f;
segmentControl.clipsToBounds = YES;
}
- (UIImage *)imageWithColor:(UIColor *)color {
CGRect rect = CGRectMake(0.0f, 0.0f, 1.0f, 1.0f);
UIGraphicsBeginImageContext(rect.size);
CGContextRef context = UIGraphicsGetCurrentContext();
CGContextSetFillColorWithColor(context, [color CGColor]);
CGContextFillRect(context, rect);
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return image;
}
【讨论】: