Question

我需要显示一个不是全屏的视图，并且在它下面有一个按钮和pickerView。我尝试使用此代码：

UIView *container = [[UIView alloc] initWithFrame:CGRectMake(20,20,200,200)];
        container.backgroundColor=[UIColor whiteColor];

        UIButton *myButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];
        myButton.frame = CGRectMake(container.frame.origin.x, container.frame.origin.y+5, 170, 20); // position in the parent view and set the size of the button
        myButton.titleLabel.textColor=[UIColor redColor];
        myButton.titleLabel.text=@"click me";
        //myButton.backgroundColor=[UIColor blueColor];
        //[myButton backgroundImageForState:<#(UIControlState)#>[UIImage imageNamed:@"iPhone_mainbutton_green.png"];
        // add targets and actions
        [myButton addTarget:self action:@selector(buttonClicked:) forControlEvents:UIControlEventTouchUpInside];
        // add a buttonview
        [container addSubview:myButton];

        UIPickerView *piker=[[UIPickerView alloc] initWithFrame:CGRectMake(container.frame.origin.x, container.frame.origin.y +30, 100, 100)];
        //piker.numberOfComponents=1;
        piker.showsSelectionIndicator=YES;
        //piker.delegate=self;
        //piker.dataSource=self;

        [container addSubview:piker];

        [myButton release];
        [piker release];

        [self.view addSubview:container];

我得到了这个（选择器离开屏幕并且非常大，而不是100x100）：

enter image description here

Answer 1

你在容器和容器框架中添加pickeer视图是:-( 20,20,200,200）

将其(0,20,200,200)。

Answer 2

您正在将UIPickerView添加为“容器”的子视图

UIPickerView *piker=[[UIPickerView alloc] initWithFrame:CGRectMake(container.frame.origin.x, container.frame.origin.y +30, 100, 100)];

这意味着如果你想让它在正确的位置，pickerview从容器而不是从UIView获取它的来源： -

UIPickerView *piker=[[UIPickerView alloc] initWithFrame:CGRectMake(0.0, 0.0, 100, 100)];
[container addSubview:picker];

只关注你的原点并记住每个子视图都从它的父视图中获取它。还有一件事苹果不允许更改pickerview高度所以你不能设置它100x100你可以改变它的宽度。 UIPickerView仅支持3个高度值，这些是216.0,180.0,162.0尝试仅从这3个值设置高度。它会起作用。

如果您对此有任何疑问，请与我们联系。

Answer 3

如果要调整框架，请在视图控制器的viewWillAppear:方法中进行调整 - 您可以在那里进行调整。

确保您还实现widthForComponent:并且所有组件的宽度合并小于帧宽 - 选择器插入。我使用以下内容：

- (void)viewDidLoad{
    self.picker = [[[UIPickerView alloc] init] autorelease];
    [self.view addSubview:self.picker];  
}

- (void)viewWillAppear:(BOOL)animated {
    [super viewWillAppear:animated];
    self.settingsPicker.frame =  CGRectMake(0.0, 100.0, self.view.frame.size.width, 100.0);
}

- (CGFloat)pickerView:(UIPickerView *)pickerView widthForComponent:(NSInteger)component {
    CGFloat guessedPickerInsetWidth = 24;
    CGFloat pickerWidth = self.view.frame.size.width - guessedPickerInsetWidth;
    if (component == SettingsPickerFirstComponent) {
        return pickerWidth * 0.4; // make the first component 40%
    }
    return pickerWidth * 0.3; // only two others, make them 30% each
}

UIPickerView的大小未正确设置

3 个答案: