在一次不細(xì)心的操作過程中，將一個(gè)bool對(duì)象改為nsstring時(shí)，忘記將修飾assign改為copy了

@property (assign, nonatomic) NSString *selectedWord;

這是第一塊代碼，第二塊代碼如下

- (void)translatorWebView:(TRTranslatorWebView *)translatorWebView didSelectText:(NSString *)selectedText {
// 此處對(duì)selectedText做了去除首尾空格處理，這是我第二塊代碼問題的關(guān)鍵
   self.selectedWord = [selectedText stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]];
   if (![self.selectedWord isEqualToString:@""]) {
       [self.delegate textTranslator:self webView:translatorWebView withText:self.selectedWord];
   }else{
       [textConciseView hideBriefViewAnimations];
   }
}
- (void)didGotTranslation:(id)dictionary{
   [self.delegate textTranslator:self withEventDic:@{@"eventName":@"TranslationBar"}];
   if (dictionary != nil  ) {
       if (dictionary[@"error"] != nil) {
           // 網(wǎng)絡(luò)錯(cuò)誤
           NSDictionary *commonConfig = [TRCommon configData:kTextTranslatorConfig];
           TRWord *wordObject = [[TRWord alloc] init];
           wordObject.name = self.selectedWord;  // 此處selectedWord對(duì)象變成野指針了
           wordObject.definitions = [BKCommon currentNetworkStatus] == BKNotReachable ? commonConfig[@"briefViewNotReachable"]:commonConfig[@"briefViewFaileText"];
           [[NSNotificationCenter defaultCenter] postNotificationName:TRDataManagerDidTranslateTextNotification object:self userInfo:@{@"word" : wordObject}];
           return;
       }else{
           [dataManager translateText:dictionary];
       }
   }
}

crash場(chǎng)景：以上代碼的情況下，出現(xiàn)在選中的換行文本處，應(yīng)該是換行的地方有什么特例情況，觸發(fā)assign修飾的string對(duì)象變成野指針
解決：將nsstring改為正確的修飾copy（不改回copy還用assign的情況下，不用去空格代碼也不會(huì)crash，當(dāng)然寫法也不規(guī)范，我是對(duì)這個(gè)特殊觸發(fā)場(chǎng)景比較疑惑）