尝试使用以下代码在readerview中打开pdf
self.appDelegate.window.rootViewController.modalPresentationStyle = UIModalPresentationCurrentContext;
self.modalPresentationStyle = UIModalPresentationCurrentContext;
dispatch_async(dispatch_get_main_queue(), ^{
[self.appDelegate.aNavController presentViewController:downloadView animated:NO completion:nil];
});
它在iPhone上工作正常，但没有在iPad上工作，显示：
ViewController respondsToSelector：发送到deallocated的消息 实例
从方案中启用zombie后出现此类错误
0x655d799 <+777>: jmp 0x655d89e ; <+1038>
0x655d79e <+782>: movl %edi, (%esp)
0x655d7a1 <+785>: calll 0x668711c ; symbol stub for: class_getSuperclass
0x655d7a6 <+790>: movl %eax, %edi
0x655d7a8 <+792>: movl %ebx, (%esp)
0x655d7ab <+795>: calll 0x668721e ; symbol stub for: object_getClassName
0x655d7b0 <+800>: movl %eax, %esi
0x655d7b2 <+802>: testl %edi, %edi
0x655d7b4 <+804>: jne 0x655d7d7 ; <+839>
0x655d7b6 <+806>: movl %ebx, %edi
0x655d7b8 <+808>: movl %edi, (%esp)
0x655d7bb <+811>: calll 0x668721e ; symbol stub for: object_getClassName
0x655d7c0 <+816>: movl %eax, 0x10(%esp)
0x655d7c4 <+820>: movl %esi, 0xc(%esp)
0x655d7c8 <+824>: movl %edi, 0x8(%esp)
0x655d7cc <+828>: movl -0x14(%ebp), %eax
0x655d7cf <+831>: leal 0x3028fa(%eax), %eax
0x655d7d5 <+837>: jmp 0x655d7ea ; <+858>
0x655d7d7 <+839>: movl %esi, 0xc(%esp)
0x655d7db <+843>: movl %ebx, %edi
0x655d7dd <+845>: movl %edi, 0x8(%esp)
0x655d7e1 <+849>: movl -0x14(%ebp), %eax
0x655d7e4 <+852>: leal 0x30290a(%eax), %eax
0x655d7ea <+858>: movl %eax, 0x4(%esp)
0x655d7ee <+862>: movl $0x4, (%esp)
0x655d7f5 <+869>: calll 0x65a94a0 ; CFLog
0x655d7fa <+874>: movl %edi, %ebx
0x655d7fc <+876>: movl -0x10(%ebp), %esi
0x655d7ff <+879>: movl %esi, (%esp)
0x655d802 <+882>: calll 0x668723c ; symbol stub for: sel_getName
0x655d807 <+887>: movl %eax, %edi
0x655d809 <+889>: movl %edi, (%esp)
0x655d80c <+892>: calll 0x6687242 ; symbol stub for: sel_getUid
0x655d811 <+897>: cmpl %esi, %eax
0x655d813 <+899>: je 0x655d83d ; <+941>
0x655d815 <+901>: movl %eax, 0x10(%esp)
0x655d819 <+905>: movl %edi, 0xc(%esp)
0x655d81d <+909>: movl -0x10(%ebp), %eax
0x655d820 <+912>: movl %eax, 0x8(%esp)
0x655d824 <+916>: movl -0x14(%ebp), %eax
0x655d827 <+919>: leal 0x30291a(%eax), %eax
0x655d82d <+925>: movl %eax, 0x4(%esp)
0x655d831 <+929>: movl $0x4, (%esp)
0x655d838 <+936>: calll 0x65a94a0 ; CFLog
0x655d83d <+941>: movl %ebx, (%esp)
0x655d840 <+944>: calll 0x6687218 ; symbol stub for: object_getClass
0x655d845 <+949>: movl -0x14(%ebp), %ecx
0x655d848 <+952>: movl 0x2eb65e(%ecx), %esi
0x655d84e <+958>: movl %esi, 0x4(%esp)
0x655d852 <+962>: movl %eax, (%esp)
0x655d855 <+965>: calll 0x6687128 ; symbol stub for: class_respondsToSelector
0x655d85a <+970>: testb %al, %al
0x655d85c <+972>: jne 0x655d88a ; <+1018>
0x655d85e <+974>: movl %ebx, (%esp)
0x655d861 <+977>: calll 0x668721e ; symbol stub for: object_getClassName
0x655d866 <+982>: movl %eax, 0xc(%esp)
0x655d86a <+986>: movl %ebx, 0x8(%esp)
0x655d86e <+990>: movl -0x14(%ebp), %eax
0x655d871 <+993>: leal 0x30292a(%eax), %eax
0x655d877 <+999>: movl %eax, 0x4(%esp)
0x655d87b <+1003>: movl $0x4, (%esp)
0x655d882 <+1010>: calll 0x65a94a0 ; CFLog
0x655d887 <+1015>: int3
0x655d888 <+1016>: jmp 0x655d89e ; <+1038>
0x655d88a <+1018>: movl -0x10(%ebp), %eax
0x655d88d <+1021>: movl %eax, 0x8(%esp)
0x655d891 <+1025>: movl %esi, 0x4(%esp)
0x655d895 <+1029>: movl %ebx, (%esp)
0x655d898 <+1032>: calll 0x66871b2 ; symbol stub for: objc_msgSend
0x655d89d <+1037>: int3
0x655d89e <+1038>: calll 0x6687680 ; symbol stub for: getpid
0x655d8a3 <+1043>: movl %eax, (%esp)
0x655d8a6 <+1046>: movl $0x9, 0x4(%esp)
0x655d8ae <+1054>: calll 0x66876da ; symbol stub for: kill
0x655d8b3 <+1059>: nopw %cs:(%eax,%eax)
使用仪器来获得这种东西。任何人都可以帮我弄清楚确切的问题在哪里
答案 0 :(得分：0)
我想我解决了这个问题，希望这个解决方案可以帮助别人。
- (void)viewWillDisappear:(BOOL)animated {
SpeakerDescriptionTableCell *cell =(SpeakerDescriptionTableCell *)localObjCell;
[cell.descriptionWebView stopLoading];
[cell.descriptionWebView setDelegate:nil];
cell.descriptionWebView = nil;
}