There is a substring that occurs in a string several times. I use rangeOfString
, but it seems that it can only find the first location. How can I find all the locations of the substring?
NSString *subString1 = @"</content>";
NSString *subString2 = @"--\n";
NSRange range1 = [newresults rangeOfString:subString1];
NSRange range2 = [newresults rangeOfString:subString2];
int location1 = range1.location;
int location2 = range2.location;
NSLog(@"%i",location1);
NSLog(@"%i",location2);
You can use rangeOfString:options:range:
and set the third argument to be beyond the range of the first occurrence. For example, you can do something like this:
NSRange searchRange = NSMakeRange(0,string.length);
NSRange foundRange;
while (searchRange.location < string.length) {
searchRange.length = string.length-searchRange.location;
foundRange = [string rangeOfString:substring options:0 range:searchRange];
if (foundRange.location != NSNotFound) {
// found an occurrence of the substring! do stuff here
searchRange.location = foundRange.location+foundRange.length;
} else {
// no more substring to find
break;
}
}