Question

我使用Dimitris的URL parser class但是当init对象转换initWithURLString时遇到问题：

- (id) initWithURLString:(NSString *)url{
    self = [super init];
    if (self != nil) {
        NSString *string = url;
        NSScanner *scanner = [NSScanner scannerWithString:string];
        [scanner setCharactersToBeSkipped:[NSCharacterSet characterSetWithCharactersInString:@"&?"]];
        NSString *tempString;
        NSMutableArray *vars = [NSMutableArray new];
        //ignore the beginning of the string and skip to the vars
        [scanner scanUpToString:@"?" intoString:nil];
        while ([scanner scanUpToString:@"&" intoString:&tempString]) {
            [vars addObject:[tempString copy]];
        }
        self.variables = vars;
    }
    return self;
}

在线[scanner scanUpToString:@"?" intoString:nil];我收到错误：

[NSURL长度]：无法识别的选择器发送到实例0x1f8c2050

怎么可能？

编辑：也许您想知道我如何调用URLParser：

URLParser *urlParser = [[URLParser alloc]initWithURLString:[info valueForKey:UIImagePickerControllerReferenceURL]];

UIImagePickerControllerReferenceURL值是：assets-library：//asset/asset.PNG？id = 8D2F0449-11A3-4962-9D60-C446831645D7＆amp; ext = PNG

Answer 1

您将NSURL传递给initWithURLString，但您应该将它与NSString一起使用，如下所示：

NSString* urlString = [NSString stringWithFormat:@"%@",[info valueForKey:UIImagePickerControllerReferenceURL]];
URLParser *parser = [[[URLParser alloc] initWithURLString:urlString] autorelease];

NSScanner在scanUpToString上无法识别的选择器

1 个答案: