转自：https://juejin.im/post/5b163f536fb9a01e7d5c33d1
相关参考 ：
方法1：
https://github.com/bravegogo/UINavigationController-SafeTransition
方法2：
https://lengmolehongyan.github.io/blog/2015/10/30/cant-add-self-as-subview-beng-kui-jie-jue-ban-fa/
viewDidAppear 和 viewDidDisappear 中 设置 NO；
方法3：
https://www.jianshu.com/p/0ba6e8e12f90
didShowViewController:animated: 中 设置 NO；
本文的方法：
[CATransaction setCompletionBlock:^{
self.prohibitPushPop = NO;
}];
多次Push Pop导致的`Can't add self as subview`问题
崩溃堆栈
*** Terminating app due to uncaught exception'NSInvalidArgumentException', reason:'Can't add self as subview'
*** First throw call stack:
(
0 CoreFoundation 0x000000010ec2df35 __exceptionPreprocess + 165
1 libobjc.A.dylib 0x000000010e8c8bb7 objc_exception_throw + 45
2 CoreFoundation 0x000000010ec2de6d +[NSException raise:format:] + 205
3 UIKit 0x000000010b351982 -[UIView(Internal) _addSubview:positioned:relativeTo:] + 123
4 UIKit 0x000000010b2d0b19 __53-[_UINavigationParallaxTransition animateTransition:]_block_invoke + 1814
5 UIKit 0x000000010b34c5ce +[UIView(Animation) performWithoutAnimation:] + 65
6 UIKit 0x000000010b2d0072 -[_UINavigationParallaxTransition animateTransition:] + 1225
7 UIKit 0x000000010b424e6c -[UINavigationController _startCustomTransition:] + 3038
8 UIKit 0x000000010b4303fe -[UINavigationController _startDeferredTransitionIfNeeded:] + 386
9 UIKit 0x000000010b430f47 -[UINavigationController __viewWillLayoutSubviews] + 43
10 UIKit 0x000000010b576509 -[UILayoutContainerView layoutSubviews] + 202
11 UIKit 0x000000010b354973 -[UIView(CALayerDelegate) layoutSublayersOfLayer:] + 521
12 QuartzCore 0x000000010f589de8 -[CALayer layoutSublayers] + 150
13 QuartzCore 0x000000010f57ea0e _ZN2CA5Layer16layout_if_neededEPNS_11TransactionE + 380
14 QuartzCore 0x000000010f57e87e _ZN2CA5Layer28layout_and_display_if_neededEPNS_11TransactionE + 24
15 QuartzCore 0x000000010f4ec63e _ZN2CA7Context18commit_transactionEPNS_11TransactionE + 242
16 QuartzCore 0x000000010f4ed74a _ZN2CA11Transaction6commitEv + 390
17 UIKit 0x000000010b2d814d _UIApplicationHandleEventQueue + 2035
18 CoreFoundation 0x000000010eb63551 __CFRUNLOOP_IS_CALLING_OUT_TO_A_SOURCE0_PERFORM_FUNCTION__ + 17
19 CoreFoundation 0x000000010eb5941d __CFRunLoopDoSources0 + 269
20 CoreFoundation 0x000000010eb58a54 __CFRunLoopRun + 868
21 CoreFoundation 0x000000010eb58486 CFRunLoopRunSpecific + 470
22 GraphicsServices 0x0000000110c659f0 GSEventRunModal + 161
23 UIKit 0x000000010b2db420 UIApplicationMain + 1282
24 moma-beta 0x00000001071abe1f main + 111
25 libdyld.dylib 0x000000011068f145 start + 1
)
libc++abi.dylib: terminating with uncaught exception of type NSException复制代码
复现步骤
修复方案： Hook UINavigationController的
- (void)pushViewController:(UIViewController *)viewController animated:(BOOL)animated;
和
- (nullable UIViewController *)popViewControllerAnimated:(BOOL)animated;
两个方法。
@implementation UINavigationController (PushPopCrashFix)
+ (void)load {
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
SwizzledMethod(self, self, @selector(popViewControllerAnimated:), @selector(p_PopViewControllerAnimated:));
SwizzledMethod(self, self, @selector(pushViewController:animated:), @selector(p_PushViewController:animated:));
});
}
- (BOOL)prohibitPushPop {
return [objc_getAssociatedObject(self, @selector(prohibitPushPop)) boolValue];
}
- (void)setProhibitPushPop:(BOOL) prohibitPushPop {
objc_setAssociatedObject(self, @selector(prohibitPushPop), @(prohibitPushPop), OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}
- (UIViewController *)p_FixPopViewControllerAnimated:(BOOL)animated {
if (self.prohibitPushPop) {
return nil;
}
self.prohibitPushPop = YES;
UIViewController *vc = [self DPPFixPopViewControllerAnimated:animated];
[CATransaction setCompletionBlock:^{
self.prohibitPushPop = NO;
}];
return vc;
}
- (void)p_PushViewController:(UIViewController *)viewController animated:(BOOL)animated {
if (self.prohibitPushPop) {
return;
}
self.prohibitPushPop = YES;
[self DPPFixPushViewController:viewController animated:animated];
[CATransaction setCompletionBlock:^{
self.prohibitPushPop = NO;
}];
}
@end
