iOS 筆記-incompatible pointer types initializing 'NSMutableString *' with an expression of type 'NSString *'警告處理

記錄下來，以防止再犯錯

代碼如下

NSString *userHeader = [userInfoDictionary objectForKey:@"photo"];
    NSMutableString *mutableuserHeader = [NSMutableString stringWithString:userHeader];
    //設置用戶頭像
    NSRange range = [mutableuserHeader rangeOfString:@".."];
    [mutableuserHeader replaceCharactersInRange:range withString:@"video"];
    NSMutableString *userHeaderInfo = [Port stringByAppendingString:mutableuserHeader];

紅色字體部分出現的題目中的警告，經查實解決辦法是把

NSMutableString換成

NSString
這樣問題便迎刃而解~