Question

我动态创建了5个UIView，它由一个UILabel和一个UIButton组成。当我点击按钮时，UIView将设置为隐藏。但它仅适用于其他四个uiviews。

   @interface ViewController : UIViewController 
   {
         NSMutableArray *newViews;

   }
   @property(nonatomic,retain)IBOutlet UILabel *welcome;
   @property(nonatomic,retain)CustomView *custom;
      -(void)buttonPressed:(UIButton *)sender;
    @end



   - (void)viewDidLoad
  {
       [super viewDidLoad];

       NSString *name=@"string of length";

       int length=[name length];

      newViews = [NSMutableArray array];

      NSMutableArray *myArray = [NSMutableArray arrayWithObjects:@"cricket",          @"golf",@"wrestling", @"FootBall is good game", nil];

int yAxis=44;

int lengthOfArray=[myArray count];

for(int a=0; a<=lengthOfArray; a++){
    self.custom= [[CustomView alloc]initWithFrame:CGRectMake(20, yAxis, 100, 44)];
        yAxis=yAxis+50;
        NSLog(@"yaxis is %i",yAxis);
        self.custom.tag=200+a;

    [newViews addObject:self.custom];
    self.custom.Label = [[UILabel alloc]initWithFrame:CGRectMake(5,5, length+70, 30)];
    self.custom.button=[[UIButton alloc]initWithFrame:CGRectMake(85,10,12,10)];
    UIImage *btnImage = [UIImage imageNamed:@"button_droparrow.png"];
    [self.custom.button setImage:btnImage forState:UIControlStateNormal];
    [self.custom.button addTarget:self                       action:@selector(buttonPressed:)forControlEvents:UIControlEventTouchDown];

     self.custom.button.tag=self.custom.button.tag+a;

    self.custom.backgroundColor=[UIColor greenColor];

    custom.Label.text=@"welcome";

    custom.Label.backgroundColor = [UIColor yellowColor];

    [self.custom addSubview:self.custom.button];

    [self.custom addSubview:custom.Label];

    [self.view addSubview:self.custom];
}

   [self.custom.button addTarget:self                       action:@selector(buttonPressed:)forControlEvents:UIControlEventTouchDown];
    }


- (void)didReceiveMemoryWarning
  {
    [super didReceiveMemoryWarning];

 }

-(void)buttonPressed:(UIButton *)sender
 {
     [self.custom setHidden:YES];

  }

   @end

请帮助我。我是iOS开发的新手。我需要在这里创建具有不同引用的UIView，并且该引用分配给UIButton以关闭该特定的UIView，但是我无法得到结果。

Answer 1

您可以使用UISegmentedControl以及每个UIView的xib数量。

在每个UIView中，您可以放置所需的UIControls并将其链接相同。
在每个索引的SegmentedControl 'indexDidChangeForSegmentedControl:(UISegmentedControl *)sender'的委托方法中删除较早的UIView并添加所需的UIView。

在主标头文件中为每个IBOutlet

添加UIView

@property (nonatomic, weak) IBOutlet UIView *view1;
@property (nonatomic, weak) IBOutlet UIView *view2;

在委托方法'indexDidChangeForSegmentedControl'中的.m文件中

- (IBAction)indexDidChangeForSegmentedControl:(UISegmentedControl *)sender {

    NSUInteger index = sender.selectedSegmentIndex;

    if (UISegmentedControlNoSegment != index) {

        if (currentIndex == index) {
            return;
        }

        currentIndex = index;
        switch (index) {
            case 0:
                {
                    [self.previousView removeFromSuperview];
                    [self.view addSubview:view1];
                    self.previousView = view1;
                }
                break;

             case 1:
                {
                    [self.previousView removeFromSuperview];
                    [self.view addSubview:view2];
                    self.previousView = view2;
                }
                break;
        }
     }
}

希望这有帮助。

Answer 2

尝试这样的事情：

- (void) buttonPressed: (UIButton*) sender
{
    UIView* view = sender.superview;
    view.hidden = YES;
}

Answer 3

如果要使用属性，则必须为每个视图创建一个属性。相反，如果要动态创建它们，可以将引用存储在数组中的每个视图中。

您应该知道/做的下一步是为每个按钮添加标签。标签只是一个数字，在这种情况下应该引用它在数组中的位置。

然后根据按钮标记（您可以从发件人检索），您可以从数组中检索正确的视图/按钮并更改其上的隐藏属性。

例如（伪代码/这不会编译）：

创建视图数组

@property（非原子，强）NSMutableArray * views;

在视图中，加载创建视图

views = [[NSMutableArray alloc] init];

int nrOfViews = 5;

for(int a=0; a<=nrOfViews; a++){
   UIView *view = create UIView here.
   UIButton *button = create button here.
   [view addSubView: button];
   [button setTag: a];
   [views addObject: view];
}

通过数组中保留的指针引用视图，根据按钮标记找到正确的指针。

-(void)buttonPressed:(UIButton *)sender
{
   UIView *view = [views objectAtIndex: sender.tag]; //using the button tag to identify the right view.
   [view setHidden: yes];

}

Answer 4

您需要进行如下更改

@property(nonatomic,strong)IBOutlet UILabel *welcome; // new arc code
@property(nonatomic,strong)UIView *custom; // new arc code 

self.custom = [[UIView alloc]initWithFrame:CGRectMake(20, yAxis, 100, 44)];

setHidden时UIView的UnEven行为

4 个答案: