我使用动画在视图之间进行转换。它有时会起作用,它有时会导致崩溃,我不明白为什么。我的代码位于@try-@catch
块中,但在@catch
中没有检索到任何异常。我只是使用SIGABRT信号和以下日志获得应用程序崩溃:
2015-09-23 10:03:43.420我的应用程序[1510:528283]视图层次结构没有为约束准备: 添加到视图时,约束的项必须是该视图(或视图本身)的后代。如果在组装视图层次结构之前需要解析约束,则会崩溃。打破 - [UIView(UIConstraintBasedLayout)_viewHierarchyUnpreparedForConstraint:]进行调试。
2015-09-23 10:03:43.421我的应用程序[1510:528283] ***断言失败 - [UIView _layoutEngine_didAddLayoutConstraint:roundingAdjustment:mutualExclusiveConstraints:],/ BuildRoot / Library / Cache / com.apple.xbs /源/的UIKit / UIKit的-3505.16 / NSLayoutConstraint_UIKitAdditions.m:590
我不明白为什么它有时会起作用,有时它会崩溃,我不明白我该如何调试它,请我帮忙。
提前致谢
修改
这种方法似乎导致应用程序崩溃:
- (void)switchToMainView
{
[UIView transitionWithView:self.view
duration:1.0
options:UIViewAnimationOptionTransitionFlipFromRight
animations:^{
@try {
if ([self.secView superview]) {
[self setMainView];
[self.secView removeFromSuperview];
[self.view addSubview:self.mainView];
[self.view sendSubviewToBack:self.secView];
}
}
@catch (NSException *exception) {
NSLog(@"exception: %@", exception.description);
}
}
completion:^(BOOL finished){
if (finished) {
@try {
[self.view setNeedsUpdateConstraints];
[self setMessage];
}
@catch (NSException *exception) {
NSLog(@"exception: %@", exception.description);
}
}
}];
}
在完成块中调用的setMessage
方法:
- (void)setMessage
{
UIView *messageView = nil;
@try {
messageView = [[[NSBundle mainBundle] loadNibNamed:@"MessageView" owner:nil options:nil] firstObject];
messageView.frame = CGRectMake(0, 0, self.messagesContainerView.frame.size.width, self.messagesContainerView.frame.size.height);
[self.messagesContainerView.subviews makeObjectsPerformSelector: @selector(removeFromSuperview)];
[self.messagesContainerView addSubview:messageView];
}
@catch (NSException *exception) {
NSLog(@"exception: %@", exception.description);
}
}
其中self.messagesContainerView
是第一种方法中self.mainView
的子视图。
再次感谢
编辑2:
这是我设法获得的最后一次崩溃信息:
日期/时间:2015-09-24 10:01:13 +0000操作系统版本:iPhone OS 9.0(13A344)报告版本:104
异常类型:SIGABRT异常代码:0x34de0d24处的#0崩溃 线程:0
特定应用信息: ***由于未捕获的异常'NSInternalInconsistencyException'终止应用程序,原因:'无法设置 视图层次结构的布局没有为约束做好准备。'
Last Exception Backtrace:0 CoreFoundation
0x22ee786b 0x22df2000 + 1005675 1 libobjc.A.dylib
0x345e6dff 0x345e0000 + 28159 2 CoreFoundation
0x22ee7741 0x22df2000 + 1005377 3基金会 0x23c772ab 0x23be0000 + 619179 4 UIKit
0x277ced17 0x26fe7000 + 8289559 5 UIKit
0x270f8b1b 0x26fe7000 + 1121051 6 UIKit
0x270f898d 0x26fe7000 + 1120653 7 UIKit
0x270f88a7 0x26fe7000 + 1120423 8 UIKit
0x277cee6d 0x26fe7000 + 8289901 9 UIKit
0x270f878f 0x26fe7000 + 1120143 10我的应用程序
0x000423c5 0x11000 + 201669 11 UIKit
0x277d479d 0x26fe7000 + 8312733 12基金会 0x23c29c81 0x23be0000 + 302209 13 UIKit
0x270fbaa9 0x26fe7000 + 1133225 14 UIKit
0x277d49d9 0x26fe7000 + 8313305 15 UIKit
0x270fc78b 0x26fe7000 + 1136523 16基金会 0x23c29c81 0x23be0000 + 302209 17 UIKit
0x270fbaa9 0x26fe7000 + 1133225 18 UIKit
0x270fc487 0x26fe7000 + 1135751 19 UIKit
0x277d4fa5 0x26fe7000 + 8314789 20 UIKit
0x272edfa9 0x26fe7000 + 3174313 21 UIKit
0x26ff56bb 0x26fe7000 + 59067 22 QuartzCore
0x268c167d 0x268b4000 + 54909 23 QuartzCore
0x268bcd79 0x268b4000 + 36217 24 QuartzCore
0x268bcc09 0x268b4000 + 35849 25 QuartzCore
0x268bc129 0x268b4000 + 33065 26 QuartzCore
0x268bbdeb 0x268b4000 + 32235 27 QuartzCore
0x268b55bf 0x268b4000 + 5567 28 CoreFoundation
0x22eaa0f1 0x22df2000 + 753905 29 CoreFoundation
0x22ea83e7 0x22df2000 + 746471 30 CoreFoundation
0x22ea8825 0x22df2000 + 747557 31 CoreFoundation
0x22dfb1e9 0x22df2000 + 37353 32 CoreFoundation
0x22dfafdd 0x22df2000 + 36829 33 GraphicsServices
0x2c09faf9 0x2c096000 + 39673 34 UIKit
0x2706018d 0x26fe7000 + 496013 35我的应用程序
0x000d7d69 0x11000 + 814441 36 libdyld.dylib
0x34d11873 0x34d0f000 + 10355线程0崩溃:0 libsystem_kernel.dylib 0x34de0d24 0x34dcc000 + 85284 1 libsystem_c.dylib 0x34d78f51 0x34d2e000 + 307025 2我的应用程序0x001abebf 0x11000 + 1683135 3 CoreFoundation 0x22ee7ba9 0x22df2000 + 1006505 4 libobjc.A.dylib
0x345e7087 0x345e0000 + 28807 5 libc ++ abi.dylib
0x33dcce17 0x33db6000 + 93719 6 libc ++ abi.dylib
0x33dcc8f7 0x33db6000 + 92407 7 libobjc.A.dylib
0x345e6f47 0x345e0000 + 28487 8 CoreFoundation
0x22dfb26f 0x22df2000 + 37487 9 CoreFoundation
0x22dfafdd 0x22df2000 + 36829 10 GraphicsServices
0x2c09faf9 0x2c096000 + 39673 11 UIKit
0x2706018d 0x26fe7000 + 496013 12我的应用程序
0x000d7d69 0x11000 + 814441 13 libdyld.dylib
0x34d11873 0x34d0f000 + 10355