디렉토리를 표시하기 위해 아웃 라인보기를 얻으려고하고 있습니다. 이제는 "EXEC_BAD_ACCESS"노드를 확장 할 때를 제외하고 내가 설정 한 모든 디렉토리에서 작동하도록 Apple의 예제를 편집했습니다. NSOutlineView 클래스에서. 여기 NSOutlineView를 사용할 때 EXC_BAD_ACCESS
헤더 파일입니다#import <Cocoa/Cocoa.h>
@interface SMLDirectoryDataSource : NSObject {
NSString *rootDirectory;
}
- (int)outlineView:(NSOutlineView *)outlineView numberOfChildrenOfItem:(id)item;
- (BOOL)outlineView:(NSOutlineView *)outlineView isItemExpandable:(id)item;
- (id)outlineView:(NSOutlineView *)outlineView
child:(int)index
ofItem:(id)item;
- (id)outlineView:(NSOutlineView *)outlineView objectValueForTableColumn:(NSTableColumn *)tableColumn
byItem:(id)item;
- (void) setRootDirectory:(NSString *)directory;
@end
@interface SMLDirectoryDataItem : NSObject
{
NSString *relativePath, *fullPath;
SMLDirectoryDataItem *parent;
NSMutableArray *children;
}
//+ (SMLDirectoryDataItem *)rootItem;
- (int)numberOfChildren;// Returns -1 for leaf nodes
- (SMLDirectoryDataItem *)childAtIndex:(int)n;// Invalid to call on leaf nodes
- (NSString *)fullPath;
- (NSString *)relativePath;
@end
을 그리고 여기에 구현 파일입니다
#import "SMLDirectoryDataSource.h"
@implementation SMLDirectoryDataSource
- (id)initWithDirectory:(NSString *)path
{
rootDirectory = path;
return self;
}
- (int)outlineView:(NSOutlineView *)outlineView numberOfChildrenOfItem:(id)item
{
return (item == nil) ? 1 : [item numberOfChildren];
}
- (BOOL)outlineView:(NSOutlineView *)outlineView isItemExpandable:(id)item
{
return (item == nil) ? NO : ([item numberOfChildren] != -1);
}
- (id)outlineView:(NSOutlineView *)outlineView
child:(int)index
ofItem:(id)item
{
NSLog(@"hi there");
if(rootDirectory == nil)
rootDirectory = @"/";
NSLog(rootDirectory);
if(item == nil){
SMLDirectoryDataItem *item = [[SMLDirectoryDataItem alloc] initWithPath:rootDirectory parent:NULL];
return item;
[item release];
}
else
return [(SMLDirectoryDataItem *)item childAtIndex:index];
}
/*(
- (id)outlineView:(NSOutlineView *)outlineView
objectValueForTableColumn:(NSTableColumn *)tableColumn
byItem:(id)item
{
if(rootDirectory == nil)
rootDirectory = @"/";
return rootDirectory;
}
*/
- (void)setRootDirectory:(NSString *)directory
{
rootDirectory = directory;
}
- (id)outlineView:(NSOutlineView *)outlineView objectValueForTableColumn:(NSTableColumn *)tableColumn byItem:(id)item {
if(item == nil)
return rootDirectory;
else
return (id)[(SMLDirectoryDataItem *)item relativePath];
}
- (BOOL)outlineView:(NSOutlineView *)outlineView shouldEditTableColumn:(NSTableColumn *)tableColumn item:(id)item {
return NO;
}
@end
@implementation SMLDirectoryDataItem
//static SMLDirectoryDataItem *rootItem = nil;
#define IsALeafNode ((id)-1)
- (id)initWithPath:(NSString *)path parent:(SMLDirectoryDataItem *)obj
{
fullPath = [path copy];
if (self = [super init])
{
relativePath = [[path lastPathComponent] copy];
parent = obj;
}
return self;
}
/*+ (SMLDirectoryDataItem *)rootItem
{
if (rootItem == nil) rootItem = [[SMLDirectoryDataItem alloc] initWithPath:@"/" parent:nil];
return rootItem;
}*/
// Creates, caches, and returns the array of children
// Loads children incrementally
- (NSArray *)children
{
if (children == NULL) {
NSFileManager *fileManager = [NSFileManager defaultManager];
//NSString *fullPath = [self fullPath];
BOOL isDir, valid = [fileManager fileExistsAtPath:fullPath isDirectory:&isDir];
if (valid && isDir) {
NSArray *array = [fileManager contentsOfDirectoryAtPath:fullPath error:NULL];
if (!array) { // This is unexpected
children = [[NSMutableArray alloc] init];
} else {
NSInteger cnt, numChildren = [array count];
children = [[NSMutableArray alloc] initWithCapacity:numChildren];
NSString *filename = [[NSString alloc] init];
for (cnt = 0; cnt < numChildren; cnt++) {
filename = [fullPath stringByAppendingPathComponent:[array objectAtIndex:cnt]];
SMLDirectoryDataItem *item = [[SMLDirectoryDataItem alloc] initWithPath:filename parent:self];
[children addObject:item];
[item release];
}
[filename release];
}
} else {
NSLog(@"is a leaf... strange");
children = IsALeafNode;
}
}
return children;
}
- (NSString *)relativePath
{
return relativePath;
}
- (NSString *)fullPath
{
// If no parent, return our own relative path
//if (parent == nil) return relativePath;
// recurse up the hierarchy, prepending each parent’s path
//return [[parent fullPath] stringByAppendingPathComponent:relativePath];
return fullPath;
}
- (SMLDirectoryDataItem *)childAtIndex:(int)n
{
return [[self children] objectAtIndex:n];
}
- (int)numberOfChildren
{
id tmp = [self children];
return (tmp == IsALeafNode) ? (0) : [tmp count];
}
- (void)dealloc
{
if (children != IsALeafNode) [children release];
[relativePath release];
[super dealloc];
}
@end
업데이트 : 최신 버전으로 코드를 업데이트
괜찮 았으므로 충돌이 발생하지 않도록 변경했지만 이제는 "[__NSCFType numberOfChildren] : 인식 할 수없는 선택기를 인스턴스로 보냄" – kennyisaheadbanger
그러면 디버깅을해야 할 것입니다. Break on -outlineView : numberOfChildrenOfItem : 항목의 값과 클래스가 무엇인지 확인합니다. 그런 다음 아이템 클래스가 어떻게 생겼는지 결정하십시오. –
이제 저는 정말로 혼란 스럽습니다. 업데이트 된 예제를 복사했습니다. 그리고 objectValueForTableColumn 메서드는 충돌을 일으키고 있습니다. 사전에 약 4 번 호출하여 작동하고 있지만 ... if (item == nil) 어떤 이유로 작동하지 않습니다! – kennyisaheadbanger