字符串目标C中的字符出现

Question

如何计算字符串中字符的出现次数？

例

字符串:123-456-7890

我想在给定的字符串中找到" - "的出现次数

Answer 1

你可以这样做:

NSString *string = @"123-456-7890";
int times = [[string componentsSeparatedByString:@"-"] count]-1;

NSLog(@"Counted times: %i", times);

输出:

Counted times: 2