如何在ios中拾取多个图像

我正在为iPhone制作一个应用程序，希望让用户能够从照片库中多选择图像。我已经有一个工作代码供用户一次选择四个图像。但我不能一次选择2或3张图像。我想一次选择2或3个图像

如果我选择了2个图像，则会出现如下异常：由于未捕获的异常“NSRangeException”而终止应用程序，原因：“***-[\uu NSArrayM objectAtIndex:]：索引3超出边界[0..2]

如果我选择了3个图像，我会得到如下异常：由于未捕获的异常“NSRangeException”而终止应用程序，原因：“***-[\uu NSArrayM objectAtIndex:]：索引2超出边界[0..1]”

如果我单击一个图像，会出现如下异常：由于未捕获的异常“NSRangeException”而终止应用程序，原因：“***-[\uu NSArrayM objectAtIndex:]：索引1超出边界[0..0]”。我找不到解决这个问题的办法。我应该如何修复代码以使其按预期工作

以下是我目前的代码：

- (void)elcImagePickerController:(ELCImagePickerController *)picker didFinishPickingMediaWithInfo:(NSArray *)info

{

[self dismissViewControllerAnimated:YES completion:nil];

for (UIView *v in [_scrollView subviews]) 

{

[v removeFromSuperview];

 }

CGRect workingFrame = _scrollView.frame;

workingFrame.origin.x = 0;

NSMutableArray *images = [NSMutableArray arrayWithCapacity:[info count]];

for (NSDictionary *dict in info) 

{

UIImage *image = [dict objectForKey:UIImagePickerControllerOriginalImage];

[images addObject:image];

UIImageView *imageview = [[UIImageView alloc] initWithImage:image];

[imageview setContentMode:UIViewContentModeScaleAspectFit];

imageview.frame = workingFrame;

workingFrame.origin.x = workingFrame.origin.x + workingFrame.size.width;

self.chosenImages = images;

}

UIImageView *image1=[[UIImageView alloc]initWithFrame:CGRectMake(10, 240, 40, 40)];

image1.image=[images objectAtIndex:0];

[self.view addSubview:image1];

UIImageView *image2=[[UIImageView alloc]initWithFrame:CGRectMake(60, 240, 40, 40)];

image2.image=[images objectAtIndex:1];

[self.view addSubview:image2];

//self.chosenImages = images;

UIImageView *image3=[[UIImageView alloc]initWithFrame:CGRectMake(120, 240, 40, 40)];

image3.image=[images objectAtIndex:2];

[self.view addSubview:image3];

UIImageView *image4=[[UIImageView alloc]initWithFrame:CGRectMake(180, 240, 40, 40)];

image4.image=[images objectAtIndex:3];

[self.view addSubview:image4];

[_scrollView setPagingEnabled:YES];

[_scrollView setContentSize:CGSizeMake(workingFrame.origin.x, workingFrame.size.height)];

}

---

此错误告诉您正在选择的图像索引超出数组范围

例如

---

您的数组在索引[0,1,2,3]处有项，并且您正在从索引（如4和5）中选择项。您的代码说明了您的崩溃

UIImageView *image1=[[UIImageView alloc]initWithFrame:CGRectMake(10, 240, 40, 40)];

image1.image=[images objectAtIndex:0];

[self.view addSubview:image1];

UIImageView *image2=[[UIImageView alloc]initWithFrame:CGRectMake(60, 240, 40, 40)];

image2.image=[images objectAtIndex:1];

[self.view addSubview:image2];

//self.chosenImages = images;

UIImageView *image3=[[UIImageView alloc]initWithFrame:CGRectMake(120, 240, 40, 40)];

image3.image=[images objectAtIndex:2];

[self.view addSubview:image3];

UIImageView *image4=[[UIImageView alloc]initWithFrame:CGRectMake(180, 240, 40, 40)];

image4.image=[images objectAtIndex:3];

[self.view addSubview:image4];

若我选择了2张图片，我会得到如下异常：由于 未捕获异常“NSRangeException”，原因：'*-[\uu NSArrayM objectAtIndex:：索引3超出范围[0..2]

在这种情况下，您不能执行[images objectAtIndex:3]。因为数组只包含2个图像。同样，其他情况也不例外

根据评论更新：

只需尝试添加[self.view addSubview:imageview]；在for循环中，如下所示

for (NSDictionary *dict in info) 

{

    UIImage *image = [dict objectForKey:UIImagePickerControllerOriginalImage];

    [images addObject:image];

    UIImageView *imageview = [[UIImageView alloc] initWithImage:image];

    [imageview setContentMode:UIViewContentModeScaleAspectFit];

    imageview.frame = workingFrame;

    [self.view addSubview:imageview ];

    workingFrame.origin.x = workingFrame.origin.x + workingFrame.size.width;

    self.chosenImages = images;

}

---

感谢您的回复。请告诉我解决方案？我的代码中有任何更改。请告诉我……提前感谢……如果您总是选择4个图像，那么您的代码将正常工作，但在其他情况下，您需要根据所选图像的数量创建ImageView。感谢您的回复。如何根据您的建议修改我的代码。请告诉我朋友..提前感谢..根据您的评论更新了答案。请检查它是否有用。感谢您的回复。但仍然会遇到相同的异常情况…告诉我任何解决方案感谢您的回复。我没有删除任何代码…但不工作请给我任何想法…或示例代码。感谢您的回复…您必须回复给您问题答案的用户。