UIImage imageNamed上的实时应用崩溃:

Question

我的应用程序遇到了一些奇怪的问题,使用它时会崩溃UIImage.我[UIImage imageNamed:@"imageName"]从图像资产中获取图像.但在某些设备上,它返回nil哪个崩溃我的应用程序,但它不应该nil.我已经检查过它在主线程上运行,剩下足够的内存(虽然它运行不足).

图像是PDF作为图像资源中的单个矢量图像,这应该创建正确的图像大小.

任何人都可以给我任何关于如何解决这个问题的指示吗？

Thread : Crashed: com.apple.main-thread
0  CoreFoundation                 0x1844d7108 CFDataGetBytePtr + 36
1  Foundation                     0x18545a848 bytesInEncoding + 204
2  CoreFoundation                 0x1844e88d4 -[__NSCFString UTF8String] + 80
3  CoreUI                         0x18d6827c0 -[CUIStructuredThemeStore _canGetRenditionWithKey:isFPO:lookForSubstitutions:] + 780
4  CoreUI                         0x18d6a5614 -[CUICatalog _resolvedRenditionKeyFromThemeRef:withBaseKey:scaleFactor:deviceIdiom:deviceSubtype:sizeClassHorizontal:sizeClassVertical:memoryClass:graphicsClass:graphicsFallBackOrder:] + 1484
5  CoreUI                         0x18d6a4784 -[CUICatalog namedLookupWithName:scaleFactor:deviceIdiom:deviceSubtype:sizeClassHorizontal:sizeClassVertical:] + 148
6  UIKit                          0x18a3df338 __98-[_UIAssetManager imageNamed:scale:idiom:subtype:cachingOptions:sizeClassPair:attachCatalogImage:]_block_invoke + 424
7  UIKit                          0x18a3df0d8 -[_UIAssetManager imageNamed:scale:idiom:subtype:cachingOptions:sizeClassPair:attachCatalogImage:] + 212
8  UIKit                          0x18a4f1698 -[UIImageAsset imageWithTraitCollection:] + 404
9  UIKit                          0x18a3df7c0 -[_UIAssetManager imageNamed:withTrait:] + 276
10 UIKit                          0x189e7277c +[UIImage imageNamed:inBundle:compatibleWithTraitCollection:] + 220
11 UIKit                          0x189ccb47c +[UIImage imageNamed:] + 124
12 Speakap                        0x1000bef50 -[LoadingView commonInit] (LoadingView.m:74)
13 Speakap                        0x1000beabc -[LoadingView initWithFrame:] (LoadingView.m:28)
14 Speakap                        0x1001348dc -[BaseTableViewController viewDidLoad] (BaseTableViewController.m:32)
15 Speakap                        0x1001570d4 -[BaseMessageViewController viewDidLoad] (BaseMessageViewController.m:66)
16 Speakap                        0x10014aa34 -[MessageViewController viewDidLoad] (MessageViewController.m:37)
17 UIKit                          0x189b8c098 -[UIViewController loadViewIfRequired] + 996
18 UIKit                          0x189ba4350 -[UIViewController __viewWillAppear:] + 132
19 UIKit                          0x189d3dfb4 -[UINavigationController _startCustomTransition:] + 1052
20 UIKit                          0x189c4a190 -[UINavigationController _startDeferredTransitionIfNeeded:] + 688
21 UIKit                          0x189c49e6c -[UINavigationController __viewWillLayoutSubviews] + 60
22 UIKit                          0x189c49dd4 -[UILayoutContainerView layoutSubviews] + 208
23 UIKit                          0x189b877ac -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 644
24 QuartzCore                     0x189386b58 -[CALayer layoutSublayers] + 148
25 QuartzCore                     0x189381764 CA::Layer::layout_if_needed(CA::Transaction*) + 292
26 QuartzCore                     0x189381624 CA::Layer::layout_and_display_if_needed(CA::Transaction*) + 32
27 QuartzCore                     0x189380cc0 CA::Context::commit_transaction(CA::Transaction*) + 252
28 QuartzCore                     0x189380a08 CA::Transaction::commit() + 512
29 UIKit                          0x189b7d9d8 _afterCACommitHandler + 180
30 CoreFoundation                 0x1845afbd0 __CFRUNLOOP_IS_CALLING_OUT_TO_AN_OBSERVER_CALLBACK_FUNCTION__ + 32
31 CoreFoundation                 0x1845ad974 __CFRunLoopDoObservers + 372
32 CoreFoundation                 0x1845adda4 __CFRunLoopRun + 928
33 CoreFoundation                 0x1844dcca0 CFRunLoopRunSpecific + 384
34 GraphicsServices               0x18f718088 GSEventRunModal + 180
35 UIKit                          0x189bf4ffc UIApplicationMain + 204
36 Speakap                        0x100162b24 main (main.m:14)
37 libdyld.dylib                  0x19990a8b8 start + 4

Answer 1

我在这里看到的唯一可能性是特定设备可能没有正确的文件。例如，如果设备具有 Retina 显示屏，并且图像资源中没有 @2x 图像，则它将返回 nil 等。

我的建议是确保所有必需的尺寸确实存在于图像资源中+确保使用imageNamed: 参数的资源组名称。

另外，您是否在各种模拟器或真实设备上测试它？