iOS中类似微信红点显示功能
设计思路：给UIView增加一个分类所有的视图都可以根据需要来进行红点显示
#import<UIKit/UIKit.h>
@interfaceUIView(CHRRedDot)
@property(readonly,nonatomic)CALayer*chr_redDotLayer;
/**
红点圆心的位置，与各个边之间的距离。如果距离<=0，则忽略距离
*/
@property(nonatomic,assign)UIEdgeInsetschr_redDotEdgeInsets;
/**
红点的半径，默认为4
*/
@property(nonatomic,assign)CGFloatchr_redDotRadius;
/**
红点的颜色，默认为0xFF5A5A
*/
@property(nonatomic,strong)UIColor*chr_redDotColor;
/**
红点是否显示
*/
@property(nonatomic,assign)BOOLchr_redDotShow;
@end
#pragmamark-method
-(void)chr_updateRedDot{
CALayer*redDot=self.chr_redDotLayer;
if(self.chr_redDotShow){
if(redDot==nil){
redDot=[CALayerlayer];
self.chr_redDotLayer=redDot;
[self.layeraddSublayer:redDot];
}
redDot.backgroundColor=self.chr_redDotColor.CGColor;
[selfchr_layoutRedDot];
}else{
[redDotremoveFromSuperlayer];
self.chr_redDotLayer=nil;
}
}
-(void)chr_layoutRedDot{
CALayer*redDot=self.chr_redDotLayer;
if(redDot==nil)return;
CGFloatradius=self.chr_redDotRadius;
redDot.cornerRadius=radius;
UIEdgeInsetsedgeInsets=self.chr_redDotEdgeInsets;
CGFloatoriginX=edgeInsets.right<=0?edgeInsets.left-radius:self.bounds.size.width-edgeInsets.right+radius;
CGFloatoriginY=edgeInsets.bottom<=0?edgeInsets.top-radius:self.bounds.size.height-edgeInsets.bottom+radius;
CGFloatlength=radius*2;
redDot.frame=CGRectMake(originX,originY,length,length);
}
以上所述是小编给大家介绍的iOS中类似微信红点显示功能，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对毛票票网站的支持！