NSString * motherstr = @"w is w is w";
NSString * sonstr = @"w";
NSRange range = [motherstr rangeOfString:sonstr];
while(range.location != NSNotFound)
{
NSLog(@"start = %@",NSStringFromRange(range));
NSRange temp = NSMakeRange((range.location + range.length), (motherstr.length-(range.location+range.length)));
range =[motherstr rangeOfString:sonstr options:NSBackwardsSearch range:temp];
}
查找的时候只找到了开头和结尾中的w,中间的包含的子串字符并没有找到,想了很久也没想出来为什么,求大神告知。