我在使用表視圖顯示數據源中的數據時遇到問題。希望有人能在這裏指出我正確的方向。NSTableView不顯示項目
在IB我有兩個表格視圖,我分別設置他們的標籤爲1和2。我也有一個AppController對象,並將兩個表連接到數據源和委託。
該應用程序的工作原理是用戶單擊一個按鈕,該按鈕在AppController.m中運行一個方法,允許用戶導航到一個目錄並選擇它,然後該方法獲取該目錄中的所有文件名,然後進行篩選。 tif和.eps文件。很基本的東西。這是這種方法。
//allows the user to select a folder to read and filter for acceptable image files (eps, tif)
- (IBAction) getFileNames : (id) sender {
//clear out file list
if ([fileList count] > 0) {
[fileList removeAllObjects];
}
// Create the File Open Dialog class.
NSOpenPanel* openDlg = [NSOpenPanel openPanel];
// Enable the selection of files in the dialog.
[openDlg setCanChooseFiles:YES];
// Enable the selection of directories in the dialog.
[openDlg setCanChooseDirectories:YES];
// Display the dialog. If the OK button was pressed,
if ([openDlg runModalForDirectory:nil file:nil] == NSOKButton) {
// Get an array containing the full filenames of all
// files and directories selected.
NSArray* files = [openDlg filenames];
// Loop through all the files and process them. (Hopefully most of the time Mark will be selecting just the archive directory on storage server)
for(int i = 0; i < [files count]; i++) {
//make string of object path
NSString* objPath = [files objectAtIndex:i];
//determine if object is a directory or file
//create a file manager
NSFileManager* fileManager = [[NSFileManager alloc] init];
//set a bool
BOOL isDir;
//check to see if the object is a folder
if ([fileManager fileExistsAtPath:objPath isDirectory:&isDir] && isDir) {
//set the fileList array
//if it is a directory then read the contents of the directory and display in the file list table
NSError* dirErr;
NSMutableArray *rawFileList = (NSMutableArray *)[[NSFileManager defaultManager] contentsOfDirectoryAtPath:objPath error:&dirErr];
//loop through file list and get the file type, if it is a .eps or .tif then move it to fileList
for(int f=0; f<[rawFileList count]; f++) {
//set an NSString
NSString* thisFile = [rawFileList objectAtIndex:f];
//filter out any file that does not have a .tif or .eps extension
if ([thisFile rangeOfString:@".eps"].location != NSNotFound || [thisFile rangeOfString:@".eps"].location != NSNotFound) {
//add correct files to fileList arrays
[fileList addObject:thisFile];
}
//use core graphics to get the meta data of the file and determine if it is an eps or tif file
/*CGImageSourceRef source = CGImageSourceCreateWithURL((CFURLRef) URL, NULL);
NSDictionary* metadata = (NSDictionary *)CGImageSourceCopyPropertiesAtIndex(source,0,NULL);*/
}
NSLog(@"%i:::", [fileList count]);
//dump file list into NSTable
} else {
NSLog(@"nope, this is a file");
}
}
}
}
當我登錄的項目數的陣列的fileList我得到118。然而,當我在表的方法登錄的fileList在我得到0。我希望,當應用程序「醒來」,但之後的fileList是發送的對象不應該改變嗎?我知道IB中的NSTableViews連接正確(請參閱下面的代碼),因爲我可以在numberOfRowsInTableView方法中硬編碼一個數字,並在tableView方法中硬編碼一個字符串,並且它們可以工作。他們只是不會與我的陣列工作。
- (int)numberOfRowsInTableView:(NSTableView *)t {
NSLog(@"%i", [fileList count]);
return [fileList count];
}
- (id)tableView:(NSTableView *)t objectValueForTableColumn:(NSTableColumn *)tableColumn row:(int)row {
// return [fileList objectAtIndex:row];
if ([t tag] == 1) {
return [fileList objectAtIndex:row];
} else {
return @"table 2";
}
return 0;
}
我對代表如何工作的,但是從文檔,這似乎是類似的AppleScript的閒置事件,其中控制器與對象溝通,對方表示正在發生的任何變化有點模糊。我是否必須將文件列表聲明爲要觀看的數組?
很高興你回答,我只是想出了自己,併發布了一個答案,但現在我可以泵一個信用。 :D – PruitIgoe 2011-03-22 17:49:42
+ 1爲教程鏈接 - 我的老闆只是說如果你能解釋綁定到我你(我)會搖滾......:D – PruitIgoe 2011-03-22 17:50:11
很高興幫助!綁定在工作時就像魔術一樣,但他們的學習曲線肯定會更陡。 – Laura 2011-03-22 18:25:05