Question

我有这个ImportViewController.m

我从服务器的xml中提取和加载名称。元素总数为33。

- (void)viewDidLoad
{
    [super viewDidLoad];
    self.title = @"IMPORT";
    NSLog(@"User id = %@",currentUserId);

    //some code to send http request.............
    NSString *str=[[NSString alloc]initWithData:urlData encoding:NSUTF8StringEncoding];
    NSLog(@"str response:%@",str);
    NSURL *fileURL= [[NSURL alloc] initWithString:[str stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding]];
    NSData *xmlData = [[NSMutableData alloc] initWithContentsOfURL:fileURL];
    GDataXMLDocument *doc =[[GDataXMLDocument alloc] initWithData:xmlData options:0 error:nil];

    NSArray * names = [doc nodesForXPath:@"//contacts/contact/name/firstname" error:nil];

    for (GDataXMLElement *element in names) {
        // NSLog(@"name: %@ ",element.stringValue);
        [Option addObject:element.stringValue];
    }

    [Option addObject:@"nil"];
    NSLog(@"count: %u ",[Option count]);

    for (CFIndex i=0; i<=[Option count]; i++) {
        NSLog(@"options item %lu: %@\n",i,Option[i]);
    }
}

错误：由于未捕获的异常终止应用＆＃39; NSRangeException＆＃39;，原因：＆＃39; * - [__ NSArrayM objectAtIndex：]：索引33超出范围[0 .. 32]＆＃39 ; * 首先抛出调用堆栈：

Answer 1

你的行

for (CFIndex i=0; i<=[Option count]; i++)

应该阅读

for (CFIndex i=0; i<[Option count]; i++)

由于未捕获的异常'NSRangeException'而终止应用程序。 [__NSArrayM objectAtIndex：]：索引33超出边界[0 .. 32]'

1 个答案: