iOS开发小技巧

Label中的文字添加点击事件

• GitHub地址:https://github.com/lyb5834/YBAttributeTextTapAction

• 以前老师讲过类似的功能,自己懒得回头看了,找了很多第三方的,感觉这个小巧便利,作者只是扩展了分类,实现起来代码也少.先来个效果图

• 自己的项目,直接上代码

- (void)setTopicModel:(CYQTopicModel *)topicModel

{

 _topicModel = topicModel;

 NSArray *likeArr = self.topicModel.userLike;

 if (!likeArr.count) return; // 没有点赞的直接返回

 NSMutableArray *ranges = [NSMutableArray array]; // 特殊字符的Range集合,修改文字颜色用

 NSMutableArray *actionStrs = [NSMutableArray array]; // 将要添加点击事件的字符串集合

 NSString *string = @"";

 for (int i=0; i<likeArr.count; i++) {

 CYQAccount *account = likeArr[i];

 // 拼接字符串

 string = [string stringByAppendingString:account.userName];

 [actionStrs addObject:account.userName];

 if (i != likeArr.count - 1) {

 string = [string stringByAppendingString:@"，"];

 }

 // 特殊字符的Range

 NSRange range = [string rangeOfString:account.userName];

 [ranges addObject:[NSValue valueWithRange:range]];

 }

 // 转换成富文本字符串

 NSMutableAttributedString *attrStr = [[NSMutableAttributedString alloc] initWithString:string];

 [attrStr addAttributes:@{NSFontAttributeName : [UIFont systemFontOfSize:14.f]} range:NSMakeRange(0, string.length)];

 // 最好设置一下行高，不设的话默认是0

 NSMutableParagraphStyle *style = [[NSMutableParagraphStyle alloc] init];

 style.lineSpacing = 0;

 [attrStr addAttribute:NSParagraphStyleAttributeName value:style range:NSMakeRange(0, string.length)];

 // 给指定文字添加颜色

 for (NSValue *rangeVal in ranges) {

 [attrStr addAttributes:@{NSForegroundColorAttributeName : [UIColor blueColor]} range:rangeVal.rangeValue];

 }

 self.likeLabel.attributedText = attrStr;

 // 给指定文字添加点击事件,并设置代理,代理中监听点击

 [self.likeLabel yb_addAttributeTapActionWithStrings:actionStrs delegate:self];

}

• 代理中具体的事件没有处理,方法中的index参数跟模型集合一一对应,到时候直接拿到相应的模型来做事情就可以

// 弹窗的宏

#define ChaosAlertShow(messageText,buttonName) 

UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"提示" message:(messageText) 

delegate:nil cancelButtonTitle:(buttonName) otherButtonTitles: nil];

[alert show];

#pragma mark - YBAttributeTapActionDelegate

- (void)yb_attributeTapReturnString:(NSString *)string range:(NSRange)range index:(NSInteger)index

{

 NSString *message = [NSString stringWithFormat:@"点击了“%@”字符
range: %@
index: %ld 
跳转到"%@"的个人界面",string,NSStringFromRange(range),index,string];

 ChaosAlertShow(message, @"取消");

 CLog(@"%@",message);

}