Iphone NSRangeException随机崩溃应用程序 我的应用程序在\u storeArray中突然崩溃 在viewDidLoad中,使用解析xml文件的方法[self-loadUrl],然后添加字典[\u storeArray addObject:dictionary] 当carousel reusingView首先调用,然后调用[self-loadUrl]时,就会发生崩溃 我添加了if(\u storeArray),但它仍然崩溃
这是一个例外:Iphone NSRangeException随机崩溃应用程序 我的应用程序在\u storeArray中突然崩溃 在viewDidLoad中,使用解析xml文件的方法[self-loadUrl],然后添加字典[\u storeArray addObject:dictionary] 当carousel reusingView首先调用,然后调用[self-loadUrl]时,就会发生崩溃 我添加了if(\u storeArray),但它仍然崩溃,iphone,ios,xml,nsrangeexception,Iphone,Ios,Xml,Nsrangeexception,这是一个例外: 2013-04-06 09:33:35.254 Semhora[7347:907] *** Terminating app due to uncaught exception 'NSRangeException', reason: '*** -[__NSArrayM objectAtIndex:]: index 0 beyond bounds for empty array' 代码如下: - (void)loadURL:(NSString *)newURL{ // C
2013-04-06 09:33:35.254 Semhora[7347:907] *** Terminating app due to uncaught exception 'NSRangeException', reason: '*** -[__NSArrayM objectAtIndex:]: index 0 beyond bounds for empty array'
代码如下:
- (void)loadURL:(NSString *)newURL{
// Create a success block to be called when the asyn request completes
TBXMLSuccessBlock successBlock = ^(TBXML *tbxmlDocument) {
[[UIApplication sharedApplication] setNetworkActivityIndicatorVisible:NO];
// If TBXML found a root node, process element and iterate all children
if (tbxmlDocument.rootXMLElement)
{
// Obtain root element
TBXMLElement * root = tbxml.rootXMLElement;
if (root)
{
[_storeArray removeAllObjects];
TBXMLElement * elem_PLANT = [TBXML childElementNamed:@"principal" parentElement:root];
while (elem_PLANT !=nil)
{
TBXMLElement * elem_title = [TBXML childElementNamed:@"title" parentElement:elem_PLANT];
NSString *titleName = [TBXML textForElement:elem_title];
// TBXMLElement * elem_artist = [TBXML childElementNamed:@"text" parentElement:elem_PLANT];
// NSString *artistName = [TBXML textForElement:elem_artist];
TBXMLElement * elem_thumb = [TBXML childElementNamed:@"thumb_url" parentElement:elem_PLANT];
NSString *thumbName = [TBXML textForElement:elem_thumb];
TBXMLElement * elem_photo1 = [TBXML childElementNamed:@"photo1" parentElement:elem_PLANT];
NSString *photo1Name = [TBXML textForElement:elem_photo1];
TBXMLElement * elem_photo2 = [TBXML childElementNamed:@"photo2" parentElement:elem_PLANT];
NSString *photo2Name = [TBXML textForElement:elem_photo2];
TBXMLElement * elem_photo3 = [TBXML childElementNamed:@"photo3" parentElement:elem_PLANT];
NSString *photo3Name = [TBXML textForElement:elem_photo3];
TBXMLElement * elem_photo4 = [TBXML childElementNamed:@"photo4" parentElement:elem_PLANT];
NSString *photo4Name = [TBXML textForElement:elem_photo4];
TBXMLElement * elem_photo5 = [TBXML childElementNamed:@"photo5" parentElement:elem_PLANT];
NSString *photo5Name = [TBXML textForElement:elem_photo5];
NSDictionary *dictionary = [[NSDictionary alloc]initWithObjects:@[titleName, thumbName, photo1Name, photo2Name, photo3Name, photo4Name, photo5Name] forKeys:@[@"title", @"thumb_url", @"photo1", @"photo2", @"photo3", @"photo4", @"photo5",]];
elem_PLANT = [TBXML nextSiblingNamed:@"principal" searchFromElement:elem_PLANT];
[_storeArray addObject:dictionary];
[self startLoading:dictionary];
[[NSOperationQueue mainQueue] addOperationWithBlock:^{ [_carousel reloadData]; }];
}
}
}
};
// Create a failure block that gets called if something goes wrong
TBXMLFailureBlock failureBlock = ^(TBXML *tbxmlDocument, NSError * error) {
NSLog(@"Error! %@ %@", [error localizedDescription], [error userInfo]);
};
// Initialize TBXML with the URL of an XML doc. TBXML asynchronously loads and parses the file.
tbxml = [[TBXML alloc] initWithURL:[NSURL URLWithString:newURL]
success:successBlock
failure:failureBlock];
}
- (UIView *)carousel:(iCarousel *)carousel viewForItemAtIndex:(NSUInteger)index reusingView:(UIView *)view
{
//create new view if no view is available for recycling
if (view == nil)
{
FXImageView *imageView = [[FXImageView alloc] initWithFrame:CGRectMake(0, 0, 200.0f, 200.0f)];
imageView.contentMode = UIViewContentModeScaleAspectFit;
imageView.asynchronous = YES;
imageView.reflectionScale = 0.5f;
imageView.reflectionAlpha = 0.25f;
imageView.reflectionGap = 10.0f;
imageView.shadowOffset = CGSizeMake(0.0f, 2.0f);
imageView.shadowBlur = 5.0f;
imageView.cornerRadius = 10.0f;
view = imageView;
}
//show placeholder
((FXImageView *)view).processedImage = [UIImage imageNamed:@"placeholder.png"];
//set image
NSLog(@"%@", _storeArray);
if (_storeArray) {
NSDictionary *tempdic = [_storeArray objectAtIndex:0];
switch (index) {
case 0:
[(FXImageView *)view setImageWithContentsOfURL:[NSURL URLWithString:[tempdic objectForKey:@"photo1"]]];
break;
case 1:
[(FXImageView *)view setImageWithContentsOfURL:[NSURL URLWithString:[tempdic objectForKey:@"photo2"]]];
break;
case 2:
[(FXImageView *)view setImageWithContentsOfURL:[NSURL URLWithString:[tempdic objectForKey:@"photo3"]]];
break;
case 3:
[(FXImageView *)view setImageWithContentsOfURL:[NSURL URLWithString:[tempdic objectForKey:@"photo4"]]];
break;
case 4:
[(FXImageView *)view setImageWithContentsOfURL:[NSURL URLWithString:[tempdic objectForKey:@"photo5"]]];
break;
default:
break;
}
}
return view;
}
\u storeArray
的检查仅检查变量是否存在,而不检查其中是否存在任何元素。但是在检查之后,您只需假设数组中有1个元素,而不必在检查之前检查是否为真
所以改变这个
if (_storeArray) {
为此:
if (_storeArray && [_storeArray count] > 0) {
photo1
等的键。如果没有,生成的URL将为空,因此视图也可能会得到一个nil URL
我将作出如下修改:
NSDictionary *tempdic = [_storeArray objectAtIndex:0];
NSString *tempObjKey = nil;
switch (index) {
case 0:
tempObjKey = @"photo1";
break;
case 1:
tempObjKey = @"photo2";
break;
case 2:
tempObjKey = @"photo3";
break;
case 3:
tempObjKey = @"photo4";
break;
case 4:
tempObjKey = @"photo5";
break;
default:
break;
}
if (tempObjKey && [tempdic objectForKey:tempObjKey])
[(FXImageView *)view setImageWithContentsOfURL:[NSURL URLWithString:[tempdic objectForKey:tempObjKey]]];
}
我需要知道一件事,您的解析是否在所有这些之前发生并成功返回一个数组(NSLog it),因为数组似乎是这里的问题。你不能直接取出第一个物体,你必须保持防御,所以做类似的事情
if (_storeArray) {
if(_storeArray.count >0) {
NSDictionary *tempdic = [_storeArray objectAtIndex:0];
switch (index) { // all ur stmts }
}}
我无法编辑此代码以清晰显示…谢谢@Kerni,您按下哪个按钮以清晰显示代码?仅仅因为_storeArray不是nil并不意味着它包含对象。在何处将对象添加到_storeArray?它是一个空数组,因此objectAtIndex:0不存在。
if(\u storeArray)
测试对象是否存在。您的错误消息说它存在,但为空。您可以检查[\u storeArray count]
是否大于零。@JaiGovindani,我正在[self-loadUrl]方法中的[u-storeArray]中添加对象,该方法解析xml文件,然后在[self-loadUrl]中向[u-storeArray.My-xml解析调用添加字典,完成后添加[\u-storeArray-addObject:dictionary]但有时,旋转木马会在XML完成操作之前调用该方法。