我有一个 NavigationController -> UIViewController -> UIWebView
我有一个从 tableViewController 到 NavigationController 的模态序列。
每当我执行此 segue 时，应用程序就会崩溃。我没有在控制器中编写任何代码，只是简单地在情节提要中放置了一个 uiwebview。如果我删除 uiwebview，segue 运行得很好。
调试器在我的单例对象“CoData.m”中的单例创建行处停止。当我打印它的描述时，它会打印一个 uiwebview 描述，但它是一个 NSObject 类型的自定义类。
见这里http://cl.ly/GZWJ
和这里http://cl.ly/Gaig
发生了
什么？
这是它崩溃的地方。
-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
[self performSegueWithIdentifier:@"webView" sender:self];
}
编辑** CoData.m 的删节内容
import "CoData.h"
@implementation CoData
CWL_SYNTHESIZE_SINGLETON_FOR_CLASS(CoData);
@synthesize photoSessions = _photoSessions;
@synthesize userPhotos = _userPhotos;
@synthesize photoSet = _photoSet;
@synthesize user = _user;
@synthesize pushEnabled = _pushEnabled;
@synthesize showToast = _showToast;
@synthesize highQualityPhotos = _highQualityPhotos;
@synthesize photoQualityChanged = _photoQualityChanged;
@synthesize isRetina = _isRetina;
@synthesize campers = _campers;
@synthesize camperNames = _camperNames;
@synthesize infoStream = _infoStream;
-(NSCache *)photoSet
{
if(!_photoSet){
_photoSet = [[NSCache alloc] init];
}
return _photoSet;
}
-(NSDictionary *)user
{
if(!_user){
_user = [[NSDictionary alloc] init];
}
return _user;
}
-(BOOL)isRetina
{
if(!_isRetina){
_isRetina = ([[UIScreen mainScreen] respondsToSelector:@selector(scale)] && [[UIScreen mainScreen] scale] == 2);
}
return _isRetina;
}
-(void)loadDataFromPlist
{
}
-(void)loginAPIUser
{
}
-(void)saveDataToPlist
{
}
@end
和 CWL_SYNTHESIZE_SINGLETON_FOR_CLASS 宏
//
// CWLSynthesizeSingleton.h
// CocoaWithLove
//
// Created by Matt Gallagher on 2011/08/23.
// Copyright (c) 2011 Matt Gallagher. All rights reserved.
//
// Permission is given to use this source code file, free of charge, in any
// project, commercial or otherwise, entirely at your risk, with the condition
// that any redistribution (in part or whole) of source code must retain
// this copyright and permission notice. Attribution in compiled projects is
// appreciated but not required.
//
#import <objc/runtime.h>
#define CWL_DECLARE_SINGLETON_FOR_CLASS_WITH_ACCESSOR(classname, accessorMethodName) \
+ (classname *)accessorMethodName;
#if __has_feature(objc_arc)
#define CWL_SYNTHESIZE_SINGLETON_RETAIN_METHODS
#else
#define CWL_SYNTHESIZE_SINGLETON_RETAIN_METHODS \
- (id)retain \
{ \
return self; \
} \
\
- (NSUInteger)retainCount \
{ \
return NSUIntegerMax; \
} \
\
- (oneway void)release \
{ \
} \
\
- (id)autorelease \
{ \
return self; \
}
#endif
#define CWL_SYNTHESIZE_SINGLETON_FOR_CLASS_WITH_ACCESSOR(classname, accessorMethodName) \
\
static classname *accessorMethodName##Instance = nil; \
\
+ (classname *)accessorMethodName \
{ \
@synchronized(self) \
{ \
if (accessorMethodName##Instance == nil) \
{ \
accessorMethodName##Instance = [super allocWithZone:NULL]; \
accessorMethodName##Instance = [accessorMethodName##Instance init]; \
method_exchangeImplementations(\
class_getClassMethod([accessorMethodName##Instance class], @selector(accessorMethodName)),\
class_getClassMethod([accessorMethodName##Instance class], @selector(cwl_lockless_##accessorMethodName)));\
method_exchangeImplementations(\
class_getInstanceMethod([accessorMethodName##Instance class], @selector(init)),\
class_getInstanceMethod([accessorMethodName##Instance class], @selector(cwl_onlyInitOnce)));\
} \
} \
\
return accessorMethodName##Instance; \
} \
\
+ (classname *)cwl_lockless_##accessorMethodName \
{ \
return accessorMethodName##Instance; \
} \
\
+ (id)allocWithZone:(NSZone *)zone \
{ \
return [self accessorMethodName]; \
} \
\
- (id)copyWithZone:(NSZone *)zone \
{ \
return self; \
} \
- (id)cwl_onlyInitOnce \
{ \
return self;\
} \
\
CWL_SYNTHESIZE_SINGLETON_RETAIN_METHODS
#define CWL_DECLARE_SINGLETON_FOR_CLASS(classname) CWL_DECLARE_SINGLETON_FOR_CLASS_WITH_ACCESSOR(classname, shared##classname)
#define CWL_SYNTHESIZE_SINGLETON_FOR_CLASS(classname) CWL_SYNTHESIZE_SINGLETON_FOR_CLASS_WITH_ACCESSOR(classname, shared##classname)