ios - 替换 Objective-C 中出现的字符串

Question

我正在从 iOS 程序中的 sqlite 数据库获取数据。然后我从数据库获得的内容被放置在 UITextView 中。获取的文本示例如下:

“您好，这是一个示例。它有“”双引号“”并以简单结尾”

我想消除单打，用单打代替 double 。但它不起作用。这是我的代码:

NSString *question;
question = [[NSString stringWithUTF8String:(char *)sqlite3_column_text(statement1,1)] copy];   
question = [question stringByReplacingOccurrencesOfString:@"\"\"" withString:@"$$"];   
question = [question stringByReplacingOccurrencesOfString:@"\"" withString:@""];   
question = [question stringByReplacingOccurrencesOfString:@"$$" withString:@"\""];

怎么了？

Answer 1

代码看起来不错；我尝试过这样做

NSString *question = @"\"Hello this is a example. It has \"\" double quotes \"\" and ends with simple\"";
question = [question stringByReplacingOccurrencesOfString:@"\"\"" withString:@"$$"];
question = [question stringByReplacingOccurrencesOfString:@"\"" withString:@""];
question = [question stringByReplacingOccurrencesOfString:@"$$" withString:@"\""];

而且效果很好(嗯，除了引号原来所在的位置旁边有额外的空格，但很难知道你想要什么)

如果你添加一些

NSLog(@"question is now: %@", question);

您可能能够知道发生了什么，或者如果不能，您至少可以发布更多信息!