iphone - NSString 有格式字符串解析器吗？

Answer 1

stringWithFormat is "just" a front-end to sprintf; as it's plain C, scanf and its variants are also available if you need.

Answer 2

你描述你的parseWithFormat功能的方式，由于结构模糊，它不能工作。

格式替换的%@标记在您的结果字符串中消失了string，因此结果提取可能不明确。

示例：

NSString *format = @"He likes %@ and %@.";
NSString *string = [NSString 
   stringWithFormat:format, @"apples and oranges", @"bananas"];
// --> @"He likes apples and oranges and bananas."
NSArray *array = [string parseWithFormat:format];
// Array could be:
// @[@"apples and oranges", @"bananas"] or 
// @[@"apples"  @"oranges and bananas"]