如何禁用部分 UISegmentedControl？

以下是代码UISegmentedControl

UISegmentedControl *segmentedControl = [[UISegmentedControl alloc] initWithItems:[NSArray arrayWithObjects: [UIImage imageNamed:@"down.png"], [UIImage imageNamed:@"dList.png"], nil]];  

[segmentedControl addTarget:self action:@selector(segmentAction:) forControlEvents:UIControlEventValueChanged];  
segmentedControl.frame = CGRectMake(0, 0, 90, 65);  
segmentedControl.segmentedControlStyle = UISegmentedControlStyleBar;  
segmentedControl.momentary = YES;  

UIBarButtonItem *segmentBarItem = [[UIBarButtonItem alloc] initWithCustomView:segmentedControl];  

[segmentedControl release];  

self.navigationItem.rightBarButtonItem = segmentBarItem;  

[segmentBarItem release];    

and

- (void)segmentAction:(id)sender{
    if([sender selectedSegmentIndex] == 0)
    {
        button.hidden=NO;
    }
    else
    {
        [self dListMethod ];
    }
}

在 if() 部分我想禁用selectedSegmentIndex==0并启用时button.hidden=YES

Use setEnabled:forSegmentAtIndex:启用和禁用段的方法。

[segmentedControl setEnabled:NO forSegmentAtIndex:0];

如果您想禁用第一段。