从UISegmentedControl中删除白色渐变

如何在UISegmentedControl（Bar style）中摆脱或改变白色渐变？

Answer 1

我找到的唯一方法是在每个段上绘制一个图层。 坏消息是，每当它改变时你必须自己着色选定的片段（并且“取消选择”未选择的片段）好消息是你可以为每个片段设置许多不同的颜色组并在附近显示红色蓝色附近的绿色……

您可以在segmentedControl更改时调用您的方法：

- (IBAction)changeSection:(id)sender { UISegmentedControl *segmetedControl = sender; [self colorize2SegmentsWithSelected:segmetedControl.selectedSegmentIndex]; // (...) } 

在你的方法中：

 -(void)colorize2SegmentsWithSelected:(int)selected{ switch (selected) { case 0: [self myShineGradient:[initialStateArraySegmentedControl objectAtIndex:1] withColor1:myUIColor1 withColor2:myUIColor2]; [self myShineGradient:[initialStateArraySegmentedControl objectAtIndex:0] withColor1:myUIColor3 withColor2:myUIColor4]; break; case 1: [self myShineGradient:[initialStateArraySegmentedControl objectAtIndex:0] withColor1:myUIColor1 withColor2:myUIColor2]; [self myShineGradient:[initialStateArraySegmentedControl objectAtIndex:1] withColor1:myUIColor3 withColor2:myUIColor4]; break; // (...) } // (...) } 

其中myColor1和2是未选定段的中性色（UIColor），在您的情况下是3 + 4，如果只需要一种颜色，则将1种颜色=第二种（和3 = 4）。

initialStateArraySegmentedControl是你的segmentedControl的初始数组（单击时可能会命令，但是你需要初始数组），所以在你的init中试试这个：

 initialStateArraySegmentedControl = self.segmentedControl.subviews; [self setColorForBackGround:self.segmentedControl withColor1:myUIColor1 withColor2:myUIColor2]; 

最后一行是保持分段控件主视图周围的角落

和：

 - (void)myShineGradient:(UIView*)myView withColor1:(UIColor*)color1 withColor2:(UIColor*)color2 { // remove old personal shine layer (if any exists): int layerNumberNow = [[myView.layer sublayers] count]; if (layerNumberNow>2) { [[[myView.layer sublayers] objectAtIndex:0] removeFromSuperlayer]; } // add shine layer CAGradientLayer *gradientLayer = [CAGradientLayer layer]; [gradientLayer setBounds:[myView bounds]]; // Center the layer inside the parent layer [gradientLayer setPosition: CGPointMake([myView bounds].size.width/2, [myView bounds].size.height/2)]; // Set the colors for the gradient to the // two colors specified for high and low [gradientLayer setColors: [NSArray arrayWithObjects: (id)[color1 CGColor],(id)[color2 CGColor], nil]]; [myView.layer insertSublayer:gradientLayer atIndex:layerNumberNow-2]; } - (void)setColorForBackGround:(UIView*)myView withColor1:(UIColor*)color1 withColor2:(UIColor*)color2 { // add shine layer CAGradientLayer *gradientLayer = [CAGradientLayer layer]; [gradientLayer setBounds:[myView bounds]]; // Center the layer inside the parent layer [gradientLayer setPosition: CGPointMake([myView bounds].size.width/2, [myView bounds].size.height/2)]; // Set the colors for the gradient to the // two colors specified for high and low [gradientLayer setColors: [NSArray arrayWithObjects: (id)[color1 CGColor],(id)[color2 CGColor], nil]]; [myView.layer setBackgroundColor:[ [UIColor colorWithRed:0 green:0 blue:0 alpha:0] CGColor]]; [myView.layer setCornerRadius:4]; [[myView layer] setMasksToBounds:YES]; // Display a border around the button // with a 1.0 pixel width [[myView layer] setBorderWidth:1.0f]; [[myView layer] setBorderColor:[ [UIColor colorWithRed:1 green:1 blue:1 alpha:.1] CGColor] ]; /// } 

PS你需要导入石英框架