iOS用最简单的方法统计字符串中指定字符的个数

方法一：

-(int)countChar:(NSString *)s cchar:(char) c
{
int count=0;
int l=[s length];
for (int i=0; i<l; i++) {
char cc=[s characterAtIndex:i];
if (cc==c) {
count++;
}
}

return count;

}

方法二：推荐

NSString *string = @"babcaadeaceagabaeaad"; NSString *subString = @"a"; NSArray *array = [string componentsSeparatedByString:subString]; NSInteger count = [array count] - 1;