NSTableView 不显示对象值表列方法的返回值

Question

无论我返回什么，表视图都只显示在.xib文件中手动设置的文本（NSTextField的"标题"）。请帮我弄清楚我做错了什么。谢谢

我的NSTableView只有1列。

这是代码：

#import "DeviceSettingsController.h"
#import <ImageCaptureCore/ImageCaptureCore.h>
@interface DeviceSettingsController ()
@property (weak) IBOutlet NSTableView *tableViewScanners;
@property (weak) IBOutlet NSMatrix *checkBoxes;
@property NSMutableArray *availableScanners;
@property ICDeviceBrowser *deviceBrowser;
@end
@implementation DeviceSettingsController
- (void)viewDidLoad {
    [super viewDidLoad];
    _availableScanners = [[NSMutableArray alloc] init];
    _deviceBrowser = [[ICDeviceBrowser alloc] init];
    _tableViewScanners.delegate = self;
    _tableViewScanners.dataSource = self;
    _deviceBrowser.browsedDeviceTypeMask = ICDeviceTypeMaskScanner | ICDeviceLocationTypeMaskLocal | ICDeviceLocationTypeMaskShared | ICDeviceLocationTypeMaskBluetooth | ICDeviceLocationTypeMaskBonjour;
    _deviceBrowser.delegate = self;
    [_deviceBrowser start];    
}
- (id)initWithMainView:(NSView *)_theView AndMainController:(NSViewController *)_theViewController AndNibName:(NSString *)nibName AndArgs:(NSArray *)_args {
    self = [super initWithMainView:_theView AndMainController:_theViewController AndNibName:nibName AndArgs:_args];
    return self;
}
- (void)deviceBrowser:(ICDeviceBrowser *)browser didAddDevice:(ICDevice *)device moreComing:(BOOL)moreComing {
    [_availableScanners addObject:device];
    [_tableViewScanners reloadData];
}
- (void)deviceBrowser:(ICDeviceBrowser *)browser didRemoveDevice:(ICDevice *)device moreGoing:(BOOL)moreGoing {
    [_availableScanners removeObject:device];
    [_tableViewScanners reloadData];
}
- (void)didRemoveDevice:(ICDevice *)device {
}
- (NSInteger)numberOfRowsInTableView:(NSTableView *)tableView {
    return [_availableScanners count];
}
- (id)tableView:(NSTableView *)tableView objectValueForTableColumn:(NSTableColumn *)tableColumn row:(NSInteger)row {
    NSString *retVal = [((ICScannerDevice *)[_availableScanners objectAtIndex:row]) name];
    return retVal;
}
@end

Answer 1

表视图内容模式是基于单元格还是基于视图？我认为它是基于视图的，因为您提到了xib，因此您必须使用而不是objectValueForTableColumn（基于单元格）

- (NSView *)tableView:(NSTableView *)tableView viewForTableColumn:(NSTableColumn *)tableColumn row:(NSInteger)row  

另请参阅Apple Docs，因此典型的实现方式如下

- (NSView *)tableView:(NSTableView *)tableView
   viewForTableColumn:(NSTableColumn *)tableColumn
                  row:(NSInteger)row {
      // Retrieve to get the @"MyView" from the pool or,
      // if no version is available in the pool, load the Interface Builder version
      NSTableCellView *result = [tableView makeViewWithIdentifier:@"MyView" owner:self];
      // Set the stringValue of the cell's text field to the nameArray value at row
      result.textField.stringValue = [self.nameArray objectAtIndex:row];
      // Return the result
      return result;
}