iOS 截取字符串中两个指定字符串中间的字符串

- (void)viewDidLoad {
    [super viewDidLoad];
    NSString *string = @"<a href=\"http\">这是要截取的内容</a>";
    NSRange startRange = [string rangeOfString:@"\">"];
    NSRange endRange = [string rangeOfString:@"</"];
    NSRange range = NSMakeRange(startRange.location + startRange.length, endRange.location - startRange.location - startRange.length);
    NSString *result = [string substringWithRange:range];
    NSLog(@"%@",result);
}