使用我在其他地方找到的一个例子，它将两个数组合成一个使用6个文件（一个代表h / m，一个父h / m和一个子h / m - 3个类）的outlineview，我推荐了一下这个项目并将它们组合成一个标题和一个主体（以避免额外的文件，因为项目预计会变得更大。我不知道这是否允许？）。该项目正在成功构建，但是当它崩溃时我得到以下错误，并且无法弄清楚要在initWithTitle中解决什么来纠正它。我想它与我如何组合文件有关。它们是文字副本并粘贴到一个文件中，没有任何遗漏，以及不同的实现和接口保持不同。你可以从评论中看到每个截止日期。
崩溃错误：
+[IFParentNode initWithTitle:children:]: unrecognized selector sent to class 0x1000054d8
clientProjViewController.h ：
#import <Cocoa/Cocoa.h>
// IFChildNode
@interface IFChildNode : NSObject {
NSString *title;
}
@property (nonatomic, retain) NSString *title;
- (id)initWithTitle:(NSString *)theTitle;
@end
// IFParentNode
@interface IFParentNode : NSObject {
NSString *title;
NSMutableArray *children;
}
@property (nonatomic, retain) NSString *title;
@property (nonatomic, retain) NSMutableArray *children;
- (id)initWithTitle:(NSString *)theTitle children:(NSMutableArray *)theChildren;
- (void)addChild:(id)theChild;
- (void)insertChild:(id)theChild atIndex:(NSUInteger)theIndex;
- (void)removeChild:(id)theChild;
- (NSInteger)numberOfChildren;
- (id)childAtIndex:(NSUInteger)theIndex;
@end
//clientProjView
@interface clientProjViewController : NSObject {
IBOutlet NSOutlineView *outlineView;
IBOutlet NSArrayController *projectsController;
IBOutlet NSArrayController *clientsController;
IFParentNode *rootNode;
}
@end
clientProjViewController.m ：
#import "clientProjViewController.h"
@implementation clientProjViewController
- (void)awakeFromNib {
rootNode = [[IFParentNode alloc] initWithTitle:@"Root" children:nil];
NSInteger counter;
for(counter = 0; counter < 5; counter++) {
IFParentNode *tempNode = [[IFParentNode alloc] initWithTitle:[NSString stringWithFormat:@"Parent %i", counter] children:nil];
NSInteger subCounter;
for(subCounter = 0; subCounter < 5; subCounter++) {
IFChildNode *subTempNode = [[IFChildNode alloc] initWithTitle:[NSString stringWithFormat:@"Child %i", subCounter]];
[tempNode addChild:subTempNode];
[subTempNode release];
}
[rootNode addChild:tempNode];
[tempNode release];
}
}
- (void)dealloc {
[rootNode release];
[super dealloc];
}
/* - - - - - - - - - - - - - - - - - - - -
Required OutlineviewDataSource methods
- - - - - - - - - - - - - - - - - - - - */
- (id)outlineView:(NSOutlineView *)outlineView child:(NSInteger)index ofItem:(id)item {
if([item isKindOfClass:[IFChildNode class]]) {
return nil;
}
return (item == nil ? [rootNode childAtIndex:index] : [(IFParentNode *)item childAtIndex:index]);
}
- (BOOL)outlineView:(NSOutlineView *)outlineView isItemExpandable:(id)item {
return (item == nil || [item isKindOfClass:[IFParentNode class]]);
}
- (NSInteger)outlineView:(NSOutlineView *)outlineView numberOfChildrenOfItem:(id)item {
if([item isKindOfClass:[IFChildNode class]]) {
return 0;
}
return (item == nil ? [rootNode numberOfChildren] : [(IFParentNode *)item numberOfChildren]);
}
- (id)outlineView:(NSOutlineView *)outlineView objectValueForTableColumn:(NSTableColumn *)tableColumn byItem:(id)item {
if([item isKindOfClass:[IFChildNode class]]) {
return ((IFChildNode *)item).title;
}
if([item isKindOfClass:[IFParentNode class]]) {
return ((IFParentNode *)item).title;
}
return nil;
}
// Extra methods for datasource
- (BOOL)outlineView:(NSOutlineView *)outlineView isGroupItem:(id)item {
return (item == nil || [item isKindOfClass:[IFParentNode class]]);
}
- (BOOL)outlineView:(NSOutlineView *)outlineView shouldSelectItem:(id)item {
return ([item isKindOfClass:[IFChildNode class]]);
}
@end
/* - - - - - - - - - - - - - - - - - - - -
IfChild
- - - - - - - - - - - - - - - - - - - - */
@implementation IFChildNode
@synthesize title;
- (id)initWithTitle:(NSString *)theTitle {
if(self = [super init]) {
self.title = theTitle;
}
return self;
}
- (void)dealloc {
self.title = nil;
[super dealloc];
}
@end
/* - - - - - - - - - - - - - - - - - - - -
IfParent
- - - - - - - - - - - - - - - - - - - - */
@implementation IFParentNode
@synthesize title, children;
- (id)initWithTitle:(NSString *)theTitle children:(NSMutableArray *)theChildren {
if(self = [super init]) {
self.title = theTitle;
self.children = (theChildren == nil ? [NSMutableArray new] : theChildren);
}
return self;
}
- (void)addChild:(id)theChild {
[self.children addObject:theChild];
}
- (void)insertChild:(id)theChild atIndex:(NSUInteger)theIndex {
[self.children insertObject:theChild atIndex:theIndex];
}
- (void)removeChild:(id)theChild {
[self.children removeObject:theChild];
}
- (NSInteger)numberOfChildren {
return [self.children count];
}
- (id)childAtIndex:(NSUInteger)theIndex {
return [self.children objectAtIndex:theIndex];
}
- (void)dealloc {
self.title = nil;
self.children = nil;
[super dealloc];
}
@end
堆栈跟踪：
2011-02-27 19:05:44.165 ProjectName[2070:a0f] +[IFParentNode initWithTitle:children:]: unrecognized selector sent to class 0x1000054d8
2011-02-27 19:05:44.169 ProjectName[2070:a0f] An uncaught exception was raised
2011-02-27 19:05:44.169 ProjectName[2070:a0f] +[IFParentNode initWithTitle:children:]: unrecognized selector sent to class 0x1000054d8
2011-02-27 19:05:44.210 ProjectName[2070:a0f] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '+[IFParentNode initWithTitle:children:]: unrecognized selector sent to class 0x1000054d8'
*** Call stack at first throw:
(
0 CoreFoundation 0x00007fff865047b4 __exceptionPreprocess + 180
1 libobjc.A.dylib 0x00007fff83fca0f3 objc_exception_throw + 45
2 CoreFoundation 0x00007fff8655e1a0 __CFFullMethodName + 0
3 CoreFoundation 0x00007fff864d691f ___forwarding___ + 751
4 CoreFoundation 0x00007fff864d2a68 _CF_forwarding_prep_0 + 232
5 ProjectName 0x0000000100002a3f -[clientProjViewController awakeFromNib] + 81
6 CoreFoundation 0x00007fff864b2a2d -[NSSet makeObjectsPerformSelector:] + 205
7 AppKit 0x00007fff82528657 -[NSIBObjectData nibInstantiateWithOwner:topLevelObjects:] + 1445
8 AppKit 0x00007fff8252688d loadNib + 226
9 AppKit 0x00007fff82525d9a +[NSBundle(NSNibLoading) _loadNibFile:nameTable:withZone:ownerBundle:] + 248
10 AppKit 0x00007fff82525bd2 +[NSBundle(NSNibLoading) loadNibNamed:owner:] + 326
11 AppKit 0x00007fff82523153 NSApplicationMain + 279
12 ProjectName 0x0000000100001441 main + 33
13 ProjectName 0x0000000100001418 start + 52
14 ??? 0x0000000000000003 0x0 + 3
)
terminate called after throwing an instance of 'NSException'
Program received signal: “SIGABRT”.
sharedlibrary apply-load-rules all
答案 0 :(得分：1)
那是因为
- (id)initWithTitle:(NSString *)theTitle children:(NSMutableArray *)theChildren
是一种实例方法
[IFParentNode initWithTitle: @"Some title" children: children]
你必须这样打电话：
[[IFParentNode alloc] initWithTitle: @"Some title" children: children]
如果要向课程发送消息，则必须将该方法声明为静态：
+ (id)initWithTitle:(NSString *)theTitle children:(NSMutableArray *)theChildren
答案 1 :(得分：1)
虽然您的代码中似乎没有任何可能导致此崩溃的内容，但您的代码确实包含错误的内存泄漏：
self.children = (theChildren == nil ? [NSMutableArray new] : theChildren);
虽然我看不到属性声明，但看起来它被声明为（复制）或（保留）。分配数组并分配给属性而不再释放原始数组会导致内存泄漏。
答案 2 :(得分：0)
代码还可以。这是一个旧表绑定到表列之前没有出现问题，之前与代码尝试充当同一个表的数据源的代码冲突。