iOS微信朋友圈的點贊、評論功能，即點擊昵稱跳轉到個人主頁

pskz8116 8年前發布 | 25K 次閱讀 iOS開發移動開發

很多社交軟件，都會有這么一個功能，就是點擊部分文字，觸發一個事件，像微信朋友圈、QQ空間那樣點擊評論者的昵稱跳轉到個人主頁，或者點擊點贊人的昵稱跳轉到個人主頁。
本菜鳥在做社交項目的時候也遇到這個問題，一開始不知道怎么處理好。找了網上的方法，都是說：1：昵稱上面覆蓋一個UIButton 。 2：設置文字部分區域，觸發事件。
本菜鳥覺得第二種方法可靠，于是找了第三方，比如：TTTAttributedLabel、YYText 、RTLabel都是很不錯的第三方富文本。但是本菜鳥又突發奇想，我只是要實現這個簡單的功能，強大的蘋果應該不至于這么傻吧，于是就想著這么折騰一個不用第三方的辦法出來，然后就....     你懂的 ...     下面直接貼效果圖 ...  不喜勿噴,大神多多指教。</code></pre> 
  
評論的效果圖： 
   
  點贊的效果圖: 
   
  直接貼代碼：（調用UILable的擴展類） 
  在使用的地方調用方法： 
  -(void)richTextLable
{
    //評論
    NSString nameOne = @"張三";
    NSString nameTwo = @"我是李四";
    NSString *replyString = @"您好，您現在在干什么，么么噠。這個功能應該滿足需求了。";

NSString *totalString = [NSString stringWithFormat:@"%@回復%@：%@",nameOne,nameTwo,replyString];
NSMutableAttributedString *newString = [[NSMutableAttributedString alloc] initWithString:totalString];
[newString addAttribute:NSFontAttributeName value:[UIFont systemFontOfSize:16] range:NSMakeRange(0, totalString.length)];
[newString addAttribute:NSForegroundColorAttributeName value:[UIColor redColor] range:NSMakeRange(0, nameOne.length)];
[newString addAttribute:NSForegroundColorAttributeName value:[UIColor redColor] range:NSMakeRange(nameOne.length+2, nameTwo.length)];
//設置行距 實際開發中間距為0太丑了，根據項目需求自己把握
NSMutableParagraphStyle *style = [[NSMutableParagraphStyle alloc] init];
style.lineSpacing = 3;
[newString addAttribute:NSParagraphStyleAttributeName value:style range:NSMakeRange(0, totalString.length)];

UILabel *richTextLbl = [[UILabel alloc] initWithFrame:CGRectMake(20, 100, self.view.bounds.size.width - 40, 20)];
//richTextLbl.backgroundColor = [UIColor greenColor];
richTextLbl.numberOfLines = 0;//設置UILable自適應
richTextLbl.attributedText = newString;
[self.view addSubview:richTextLbl];
[richTextLbl sizeToFit];

[richTextLbl onTapRangeActionWithString:@[nameOne,nameTwo] tapClicked:^(NSString *string, NSRange range, NSInteger index) {
    NSLog(@"點擊了-->--%@ ---下標：%ld",string,index);
}];


//點贊
UILabel *goodLbl = [[UILabel alloc] init];
goodLbl.frame = CGRectMake(20, 170, 100, 20);
goodLbl.text = @"點贊的:";
[self.view addSubview:goodLbl];

NSArray *goodArray = @[@"張三",@"李四",@"王五",@"李兆",@"粟子",@"小李",@"李四",@"王五",@"李兆",@"粟子",@"小李"];
NSString *goodTotalString = [goodArray componentsJoinedByString:@", "];

NSMutableAttributedString *newGoodString = [[NSMutableAttributedString alloc] initWithString:goodTotalString];
[newGoodString addAttribute:NSFontAttributeName value:[UIFont systemFontOfSize:16] range:NSMakeRange(0, goodTotalString.length)];

//設置行距 實際開發中間距為0太丑了，根據項目需求自己把握
NSMutableParagraphStyle *paragraphstyle = [[NSMutableParagraphStyle alloc] init];
paragraphstyle.lineSpacing = 3;
[newGoodString addAttribute:NSParagraphStyleAttributeName value:paragraphstyle range:NSMakeRange(0, goodTotalString.length)];

UILabel *goodTextLbl = [[UILabel alloc] initWithFrame:CGRectMake(20, 200, self.view.bounds.size.width - 40, 20)];
goodTextLbl.backgroundColor = [UIColor orangeColor];
goodTextLbl.numberOfLines = 0;//設置UILable自適應
goodTextLbl.attributedText = newGoodString;
[self.view addSubview:goodTextLbl];
[goodTextLbl sizeToFit];

[goodTextLbl onTapRangeActionWithString:goodArray tapClicked:^(NSString *string, NSRange range, NSInteger index) {
    NSLog(@"這是第--%ld--個點贊的,他是--%@",index,string);
}];

}</code></pre> 
  
下面是UILable擴展類 
  #import <UIKit/UIKit.h>
@interface XLRichTextModel : NSObject
@property (nonatomic, copy) NSString *string;
@property (nonatomic, assign) NSRange range;
@end
@interface UILabel (Category)
///是否顯示點擊效果，默認是打開
@property (nonatomic, assign) BOOL isShowTagEffect;
///TagArray  點擊的字符串數組

(void)onTapRangeActionWithString:(NSArray <NSString > )TagArray tapClicked:(void (^) (NSString *string , NSRange range , NSInteger index))tapClick;

@end</code></pre> 
  
#import "UILabel+Category.h"
import <objc/runtime.h>
import <CoreText/CoreText.h>
import <Foundation/Foundation.h>
@implementation XLRichTextModel
@end
@implementation UILabel (Category)
pragma mark - AssociatedObjects

(NSMutableArray *)attributeStrings
{
  return objc_getAssociatedObject(self, _cmd);
}

(void)setAttributeStrings:(NSMutableArray *)attributeStrings
{
  objc_setAssociatedObject(self, @selector(attributeStrings), attributeStrings, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}

(NSMutableDictionary *)effectDic
{
  return objc_getAssociatedObject(self, _cmd);
}

(void)setEffectDic:(NSMutableDictionary *)effectDic
{
  objc_setAssociatedObject(self, @selector(effectDic), effectDic, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}

(BOOL)isTapAction
{
  return [objc_getAssociatedObject(self, _cmd) boolValue];
}

(void)setIsTapAction:(BOOL)isTapAction
{
  objc_setAssociatedObject(self, @selector(isTapAction), @(isTapAction), OBJC_ASSOCIATION_ASSIGN);
}

(void (^)(NSString *, NSRange, NSInteger))tapBlock
{
  return objc_getAssociatedObject(self, _cmd);
}

(void)setTapBlock:(void (^)(NSString *, NSRange, NSInteger))tapBlock
{
  objc_setAssociatedObject(self, @selector(tapBlock), tapBlock, OBJC_ASSOCIATION_COPY_NONATOMIC);
}

(BOOL)isShowTagEffect
{
  return [objc_getAssociatedObject(self, _cmd) boolValue];
}


-(void)setIsShowTagEffect:(BOOL)isShowTagEffect
{
    objc_setAssociatedObject(self, @selector(isShowTagEffect), @(isShowTagEffect), OBJC_ASSOCIATION_ASSIGN);
    self.isTapEffect = isShowTagEffect;
}

(BOOL)isTapEffect
{
  return [objc_getAssociatedObject(self, _cmd) boolValue];
}

(void)setIsTapEffect:(BOOL)isTapEffect
{
  objc_setAssociatedObject(self, @selector(isTapEffect), @(isTapEffect), OBJC_ASSOCIATION_ASSIGN);
}


pragma mark - 事件方法

(void)onTapRangeActionWithString:(NSArray <NSString > )TagArray tapClicked:(void (^) (NSString *string , NSRange range , NSInteger index))tapClick
{
  //獲取部分點擊的區域
  [self tagRangeActionWithString:TagArray];
if (self.tapBlock != tapClick) {

  self.tapBlock = tapClick;

}
}


pragma mark - touchAction

(void)touchesBegan:(NSSet<UITouch > )touches withEvent:(UIEvent *)event
{
  if (!self.isTapAction) {

  return;

}
if (objc_getAssociatedObject(self, @selector(isShowTagEffect))) {

  self.isTapEffect = self.isShowTagEffect;

}
UITouch *touch = [touches anyObject];
CGPoint point = [touch locationInView:self];
__weak typeof(self) weakSelf = self;
[self tapFrameWithTouchPoint:point result:^(NSString *string, NSRange range, NSInteger index) {

  if (weakSelf.tapBlock) {
      weakSelf.tapBlock (string , range , index);
  }

  if (self.isTapEffect) {

      [self saveEffectDicWithRange:range];

      [self tapEffectWithStatus:YES];
  }


}];
}

(UIView )hitTest:(CGPoint)point withEvent:(UIEvent )event {
if (self.isTapAction) {

  if ([self tapFrameWithTouchPoint:point result:nil]) {
      return self;
  }

}
  return [super hitTest:point withEvent:event];
}


pragma mark - 獲取點擊的范圍

(BOOL)tapFrameWithTouchPoint:(CGPoint)point result:(void (^) (NSString *string , NSRange range , NSInteger index))resultBlock
{
  CTFramesetterRef framesetter = CTFramesetterCreateWithAttributedString((CFAttributedStringRef)self.attributedText);
CGMutablePathRef Path = CGPathCreateMutable();
CGPathAddRect(Path, NULL, CGRectMake(0, 0, self.bounds.size.width, self.bounds.size.height));
CTFrameRef frame = CTFramesetterCreateFrame(framesetter, CFRangeMake(0, 0), Path, NULL);
CFRange range = CTFrameGetVisibleStringRange(frame);
if (self.attributedText.length > range.length) {

  UIFont *font ;

  if ([self.attributedText attribute:NSFontAttributeName atIndex:0 effectiveRange:nil]) {

      font = [self.attributedText attribute:NSFontAttributeName atIndex:0 effectiveRange:nil];

  }else if (self.font){
      font = self.font;

  }else {
      font = [UIFont systemFontOfSize:17];
  }

  Path = CGPathCreateMutable();

  CGPathAddRect(Path, NULL, CGRectMake(0, 0, self.bounds.size.width, self.bounds.size.height + font.lineHeight));

  frame = CTFramesetterCreateFrame(framesetter, CFRangeMake(0, 0), Path, NULL);

}
CFArrayRef lines = CTFrameGetLines(frame);
if (!lines) {

  return NO;

}
CFIndex count = CFArrayGetCount(lines);
CGPoint origins[count];
CTFrameGetLineOrigins(frame, CFRangeMake(0, 0), origins);
CGAffineTransform transform = [self transformForCoreText];
CGFloat verticalOffset = 0;
for (CFIndex i = 0; i < count; i++) {

  CGPoint linePoint = origins[i];

  CTLineRef line = CFArrayGetValueAtIndex(lines, i);

  CGRect flippedRect = [self lineBounds:line point:linePoint];

  CGRect rect = CGRectApplyAffineTransform(flippedRect, transform);

  rect = CGRectInset(rect, 0, 0);

  rect = CGRectOffset(rect, 0, verticalOffset);

  NSParagraphStyle *style = [self.attributedText attribute:NSParagraphStyleAttributeName atIndex:0 effectiveRange:nil];

  CGFloat lineSpace;

  if (style) {
      lineSpace = style.lineSpacing;
  }else {
      lineSpace = 0;
  }

  CGFloat lineOutSpace = (self.bounds.size.height - lineSpace * (count - 1) -rect.size.height * count) / 2;

  rect.origin.y = lineOutSpace + rect.size.height * i + lineSpace * i;

  if (CGRectContainsPoint(rect, point)) {

      CGPoint relativePoint = CGPointMake(point.x - CGRectGetMinX(rect), point.y - CGRectGetMinY(rect));

      CFIndex index = CTLineGetStringIndexForPosition(line, relativePoint);

      CGFloat offset;

      CTLineGetOffsetForStringIndex(line, index, &offset);

      if (offset > relativePoint.x) {
          index = index - 1;
      }

      NSInteger link_count = self.attributeStrings.count;

      for (int j = 0; j < link_count; j++) {

          XLRichTextModel *model = self.attributeStrings[j];

          NSRange link_range = model.range;
          if (NSLocationInRange(index, link_range)) {
              if (resultBlock) {
                  resultBlock (model.string , model.range , (NSInteger)j);
              }
              return YES;
          }
      }
  }

}
  return NO;
}

(void)touchesEnded:(NSSet<UITouch > )touches withEvent:(UIEvent *)event
{
  if (self.isTapEffect) {

  [self performSelectorOnMainThread:@selector(tapEffectWithStatus:) withObject:nil waitUntilDone:NO];


}
}

(void)touchesCancelled:(NSSet<UITouch > )touches withEvent:(UIEvent *)event
{
  if (self.isTapEffect) {

  [self performSelectorOnMainThread:@selector(tapEffectWithStatus:) withObject:nil waitUntilDone:NO];


}
}

(CGAffineTransform)transformForCoreText
{
  return CGAffineTransformScale(CGAffineTransformMakeTranslation(0, self.bounds.size.height), 1.f, -1.f);
}

(CGRect)lineBounds:(CTLineRef)line point:(CGPoint)point
{
  CGFloat ascent = 0.0f;
  CGFloat descent = 0.0f;
  CGFloat leading = 0.0f;
  CGFloat width = (CGFloat)CTLineGetTypographicBounds(line, &ascent, &descent, &leading);
  CGFloat height = ascent + fabs(descent) + leading;
return CGRectMake(point.x, point.y , width, height);
}


pragma mark - 是否顯示點擊效果  默認是   項目中一般是現實點擊效果

(void)tapEffectWithStatus:(BOOL)status
{
  if (self.isTapEffect) {

  NSMutableAttributedString *attStr = [[NSMutableAttributedString alloc] initWithAttributedString:self.attributedText];

  NSMutableAttributedString *subAtt = [[NSMutableAttributedString alloc] initWithAttributedString:[[self.effectDic allValues] firstObject]];

  NSRange range = NSRangeFromString([[self.effectDic allKeys] firstObject]);

  if (status) {
      [subAtt addAttribute:NSBackgroundColorAttributeName value:[UIColor lightGrayColor] range:NSMakeRange(0, subAtt.string.length)];

      [attStr replaceCharactersInRange:range withAttributedString:subAtt];
  }else {

      [attStr replaceCharactersInRange:range withAttributedString:subAtt];
  }
  self.attributedText = attStr;

}
}

(void)saveEffectDicWithRange:(NSRange)range
{
  self.effectDic = [NSMutableDictionary dictionary];
NSAttributedString *subAttribute = [self.attributedText attributedSubstringFromRange:range];
[self.effectDic setObject:subAttribute forKey:NSStringFromRange(range)];
}


pragma mark - 獲取部分點擊的區域

(void)tagRangeActionWithString:(NSArray <NSString >  )strings
{
  if (self.attributedText == nil) {

  self.isTapAction = NO;
  return;

}
self.isTapAction = YES;
self.isTapEffect = YES;
__block  NSString *totalStr = self.attributedText.string;
self.attributeStrings = [NSMutableArray array];
__weak typeof(self) weakSelf = self;
[strings enumerateObjectsUsingBlock:^(NSString  _Nonnull obj, NSUInteger idx, BOOL  _Nonnull stop) {

  NSRange range = [totalStr rangeOfString:obj];

  if (range.length != 0) {

      totalStr = [totalStr stringByReplacingCharactersInRange:range withString:[weakSelf stringWithRange:range]];

      XLRichTextModel *model = [XLRichTextModel new];

      model.range = range;

      model.string = obj;

      [weakSelf.attributeStrings addObject:model];

  }


}];
}

(NSString )stringWithRange:(NSRange)range
{
  NSMutableString string = [NSMutableString string];
for (int i = 0; i < range.length ; i++) {

  [string appendString:@" "];

}
  return string;
}


@end</code></pre> 
  
  
  來自：http://www.jianshu.com/p/34369aed6789


                    
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                         iOS開發 移動開發

iOS微信朋友圈的點贊、評論功能，即點擊昵稱跳轉到個人主頁

import <objc/runtime.h>

import <CoreText/CoreText.h>

import <Foundation/Foundation.h>

pragma mark - AssociatedObjects

pragma mark - 事件方法

pragma mark - touchAction

pragma mark - 獲取點擊的范圍

pragma mark - 是否顯示點擊效果默認是項目中一般是現實點擊效果

pragma mark - 獲取部分點擊的區域

相關經驗

相關資訊

相關文檔

目錄

iOS微信朋友圈的點贊、評論功能，即點擊昵稱跳轉到個人主頁

import <objc/runtime.h>

import <CoreText/CoreText.h>

import <Foundation/Foundation.h>

pragma mark - AssociatedObjects

pragma mark - 事件方法

pragma mark - touchAction

pragma mark - 獲取點擊的范圍

pragma mark - 是否顯示點擊效果 默認是 項目中一般是現實點擊效果

pragma mark - 獲取部分點擊的區域

相關經驗

相關資訊

相關文檔

目錄

pragma mark - 是否顯示點擊效果默認是項目中一般是現實點擊效果