Question

我试图通过使用分段控制器在2个uiviews之间切换，但我似乎无法掌握它。

- (void)viewDidLoad {
    [super viewDidLoad];


    CGRect applicationFrame = [[UIScreen mainScreen] applicationFrame];
   contentView = [[UIView alloc] initWithFrame:applicationFrame];
    contentView.backgroundColor = [UIColor greenColor];
    self.view = contentView;

   CGRect applicationFrame2 = [[UIScreen mainScreen] applicationFrame];
    contentView2 = [[UIView alloc] initWithFrame:applicationFrame2];
    contentView2.backgroundColor = [UIColor yellowColor];



    NSArray *itemArray = [NSArray arrayWithObjects: @"Player 1", @"Player 2", nil];
    segmentedControl = [[UISegmentedControl alloc] initWithItems:itemArray];
    segmentedControl.frame = CGRectMake(12, 100, 350, 30);
    [segmentedControl addTarget:self action:@selector(segmentAction) forControlEvents: UIControlEventValueChanged];
    [contentView addSubview:segmentedControl];
    [contentView2 addSubview:segmentedControl];

}

-(void) segmentAction {

    if (segmentedControl.selectedSegmentIndex == 0) {

        [contentView setHidden:NO];
        [contentView2 setHidden:YES];

    }
    if (segmentedControl.selectedSegmentIndex == 1) {

        [contentView setHidden:YES];
        [contentView2 setHidden: NO];

    }
}

当我运行此代码时，分段控件不会显示在任何视图上。我试着拿出这条线：

[contentView2 addSubview：segmentedControl];

但现在第二个UIView显示黑色而不是黄色，只有第一个UIView显示UISegmented控件。我是IOS的初学者，非常感谢任何帮助。

Answer 1

在视图didload ....删除此行..

  [contentView addSubview:segmentedControl];
  [contentView2 addSubview:segmentedControl];

＆安培;添加以下行......

 [self.view addsubview:contentView ];
[self.view addsubview:contentView2 ];
[self.view addsubview:segmentedControl];

使用UISegmentedControl切换UIViews

1 个答案: