搜索字符串中字符出现的次数，并且高亮显示

objective-c :搜索字符串中字符出现的次数，并且高亮显示

- (NSMutableAttributedString *)colorData:(NSString *)withStr{

NSMutableAttributedString *dataStr = [[NSMutableAttributedString alloc] initWithString:withStr];

for (int i = 0; i < withStr.length - appDelegate.searchKeyWords.length + 1; i++) {

if ([[withStr substringWithRange:NSMakeRange(i, appDelegate.searchKeyWords.length)] isEqualToString:appDelegate.searchKeyWords])
{

NSRange range = NSMakeRange(i, appDelegate.searchKeyWords.length);

[dataStr addAttribute:NSForegroundColorAttributeName value:SETCOLOR(255, 114, 0) range:NSMakeRange(range.location,range.length)];

}

}

return dataStr;

}