近日iOS13更新,Xcode也随之升级到11版本,运行了一下项目,发现iOS13针对UISegmentedControl进行了重做,默认样式改成了如下图:
UISegmentedControl.png
这样子之前自定义的UISegmentedControl样式都出现了问题。。。
首先发现圆角设置失效了,iOS12以前设置圆角:
testSegmentedControl.layer.masksToBounds = true
testSegmentedControl.layer.cornerRadius = 10
但是iOS13系统下,完全不起作用,后来找到了方法,可以用重写UISegmentedControl的layoutSubviews方法来设置圆角。
class TestSegmentedControl: UISegmentedControl {
open override func layoutSubviews() {
super.layoutSubviews()
layer.cornerRadius = 10
}
}
这样子我们用TestSegmentedControl作为子类重写父类的layoutSubviews的方法,就又可以设置圆角啦。
如果项目有需求一定要在iOS13系统上实现iOS12以前的风格样式,可以自定义一个category来实现:(下面是本人在网上找到的方法,亲测有效)
@interface UISegmentedControl (Style_OC)
/// UISegmentedControl 将iOS13风格转化成iOS12之前的风格样式
- (void)ensureiOS12Style;
@end
@implementation UISegmentedControl (Style_OC)
- (void)ensureiOS12Style {
// UISegmentedControl has changed in iOS 13 and setting the tint
// color now has no effect.
if (@available(iOS 13, *)) {
UIColor *tintColor = [self tintColor];
UIImage *tintColorImage = [self imageWithColor:tintColor];
// Must set the background image for normal to something (even clear) else the rest won't work
[self setBackgroundImage:[self imageWithColor:self.backgroundColor ? self.backgroundColor : [UIColor clearColor]] forState:UIControlStateNormal barMetrics:UIBarMetricsDefault];
[self setBackgroundImage:tintColorImage forState:UIControlStateSelected barMetrics:UIBarMetricsDefault];
[self setBackgroundImage:[self imageWithColor:[tintColor colorWithAlphaComponent:0.2]] forState:UIControlStateHighlighted barMetrics:UIBarMetricsDefault];
[self setBackgroundImage:tintColorImage forState:UIControlStateSelected|UIControlStateSelected barMetrics:UIBarMetricsDefault];
[self setTitleTextAttributes:@{NSForegroundColorAttributeName: tintColor, NSFontAttributeName: [UIFont systemFontOfSize:13]} forState:UIControlStateNormal];
[self setDividerImage:tintColorImage forLeftSegmentState:UIControlStateNormal rightSegmentState:UIControlStateNormal barMetrics:UIBarMetricsDefault];
self.layer.masksToBounds = YES;
self.layer.borderWidth = 1;
self.layer.borderColor = [tintColor CGColor];
}
}
- (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 *theImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return theImage;
}
@end
以下是本人项目在iOS13下运行的结果:
自定义样式.png
完美还原!!!
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