NSString中的多重搜索

Question

NSString *labelText = @"Choose a topic from the left to find answers for your questions about iPhone. For the latest downloads, manuals, and other resources for iPhone, choose an option below."; 
NSLog(@"Label Text:--->%@",labelText); 

所以我的问题是，我想要搜索iPhone文本无论在上面的nsstring中显示，并且如果可能的话，也请获取位置，所以请给我任何想法或任何链接来开发此功能。

Answer 1

拿在这里：（NSLog将打印substring位置的指标在source字符串）

- (void)findAllLocationsOfString:(NSString *)substring sourceString:(NSString *)source 
{ 
    NSRange searchRange = NSMakeRange(0, [source length]); 
    NSRange place = NSMakeRange(0, 0); 
    while (searchRange.location < [source length]) 
    { 
     place = [source rangeOfString:substring options:NSLiteralSearch range:searchRange]; 
     if (place.location != NSNotFound) NSLog(@"found here : %d", place.location); 
     searchRange.location = place.location + place.length; 
     searchRange.length = [source length] - searchRange.location; 
    } 
}