通过创建UIView的分类来实现,这样处理的前提是视图的frame已经固定,如果是使用了约束,可以重写drawrect方法,并在此设置圆角
.h文件如下
#import <UIKit/UIKit.h>
NS_ASSUME_NONNULL_BEGIN
@interface UIView (CusCorner)
/**
设置指定位置的圆角
@param rectCorner 圆角位置(该变量可使用或运算,用于同时设置多个圆角)
@param radius 圆角半径
@param borderWidth 边框宽度
@param borderColor 边框颜色
@param fillColor 填充色
@param name 给子layer命名,防止重复设置增加开销
*/
- (void)setupRoundedCorners:(UIRectCorner)rectCorner
cornerRadius:(CGFloat)radius
borderWidth:(CGFloat)borderWidth
borderColor:( UIColor * _Nullable )borderColor
fillColor:(UIColor * _Nullable)fillColor
layerName:(NSString * _Nullable)name;
@end
NS_ASSUME_NONNULL_END
.m文件如下
#import "UIView+CusCorner.h"
@implementation UIView (CusCorner)
- (void)setupRoundedCorners:(UIRectCorner)rectCorner
cornerRadius:(CGFloat)radius
borderWidth:(CGFloat)borderWidth
borderColor:( UIColor * _Nullable )borderColor
fillColor:(UIColor * _Nullable)fillColor
layerName:(NSString * _Nullable)name{
//设置遮罩
CAShapeLayer *mask=nil;
if ([self.layer.mask.name isEqualToString:name]) {
mask = self.layer.mask;
} else {
mask=[CAShapeLayer layer];
mask.name = name;
}
UIBezierPath * path= [UIBezierPath bezierPathWithRoundedRect:self.bounds byRoundingCorners:rectCorner cornerRadii:CGSizeMake(radius,radius)];
mask.path=path.CGPath;
mask.frame=self.bounds;
self.layer.mask = mask;
//设置边框及填充色
__block CAShapeLayer *borderLayer = nil;
if (name.length) {
NSArray<CALayer *> *subLayers = self.layer.sublayers;
[subLayers enumerateObjectsUsingBlock:^(CALayer * _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
if([obj.name isEqualToString:name]){
borderLayer = (CAShapeLayer *)obj;
*stop = YES;
}
}];
}
if (!borderLayer) {
borderLayer=[CAShapeLayer layer];
borderLayer.name = name;
[self.layer addSublayer:borderLayer];
}
borderLayer.path=path.CGPath;
if (fillColor) {
borderLayer.fillColor = fillColor.CGColor;
}
if (borderColor) {
borderLayer.strokeColor = borderColor.CGColor;
}
if (borderWidth > 0) {
borderLayer.lineWidth = borderWidth;
}
borderLayer.frame = self.bounds;
}
@end
调用如下
//swift
cusView.setupRoundedCorners([.topLeft , .topRight , .bottomLeft],
cornerRadius: 12,
borderWidth: 0,
borderColor: nil,
fill:UIColor.clear,
layerName: "local")
//oc
[self.cusView setupRoundedCorners:UIRectCornerTopLeft|UIRectCornerTopRight
cornerRadius:15
borderWidth:0
borderColor:nil
fillColor:UIColor.clearColor
layerName:@"layername"];
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