NSArray [UIImage setContentMode:]

Question

如果我没有来自 url 提要的图像，我想放置默认图像。

if(![[stories objectAtIndex:storyIndex] valueForKey:@"url"]==nil)
{  NSNumber *numberOfKeyInstances = [stories valueForKey:@"key"];
    imageArray=[NSArray arrayWithObjects:[UIImage imageNamed:@"1.png"],nil];

    int  randomNumber_ = rand ()%19;
    UIImage *image = [imageArray objectAtIndex:indexPath.row];
    cell.imag=image;




}
else{
    if (![[[stories objectAtIndex:storyIndex] valueForKey:@"url"] isEqualToString:@""]) {


        [cell.imag setImageWithURL:[NSURL URLWithString:[[stories objectAtIndex:storyIndex] objectForKey:@"url"]] placeholderImage:[UIImage imageNamed:@"Alb.png"]];

    }



}

这是我的代码，但我得到 [UIImage setContentMode:]: unrecognized selector sent to instance 0x7f908c1dcce0'

我该如何解决？

Answer 1

尝试改变

UIImage *image = [imageArray objectAtIndex:indexPath.row];

至

UIImage *image = [UIImage imageNamed:[NSString stringWithFormat:[imageArray objectAtIndex:indexPath.row]]];

Answer 2

我怀疑 cell.imag 是 UIImageView 而不是 UIImage 属性。

所以你需要改变：

cell.imag=image;

到

cell.imag.image = image;

Answer 3

首先，imageArray只用一张图片初始化。所以调用[imageArray objectAtIndex:indexPath.row]是有问题的。你不需要一个图像数组。其次，第一个 if 语句中的参数看起来不正确。

此外，正如@midhun-mp 指出的那样，您可能应该使用 cell.imag.image。

试试这个：

if([[stories objectAtIndex:storyIndex] valueForKey:@"url"] == nil)
{  
   cell.imag.image = [UIImage imageNamed:@"1.png"];
}
else if ([[[stories objectAtIndex:storyIndex] valueForKey:@"url"] isEqualToString:@""]) 
{
   cell.imag.image = [UIImage imageNamed:@"1.png"];
}
else
{
   //SET YOUR IMAGE HERE
}

NSArray [UIImage setContentMode:]

NSArray [UIImage setContentMode:]

objective-c

uiimage

ios