一个关于oc语言的题 大神请进

NSString *string1 = @"today, we will study another string , this string is import for us!";
NSString *string2 = @"string";
NSRange range = [string1 rangeOfString:string2];
int location = range.location;
int leight = range.length;
NSString *astring = [[NSString alloc] initWithString:[NSString stringWithFormat:@"Location:%i,Leight:%i",location,leight]];
NSLog(@"astring:%@",astring);
[astring release];

---------------------------------------------或者

int)getSubStringShowNumsInStringBy:(NSString*)string andSubstring:(NSString*)Substring
{
int count =0;
NSRange range = [string rangeOfString:Substring];
if(range.length>0)
{
count++;
while (range.length>0) {
int startIndex =range.location+range.length;
int endIndex = string.length -startIndex;
string= [string substringWithRange:NSMakeRange(startIndex, endIndex)];
range = [string rangeOfString:Substring];
if(range.length>0)
{
count++;
}
}
}
return count;
}