UIControl子类之间的关联实例

- (void)viewDidLoad {

    [super viewDidLoad];

    // Do any additional setup after loading the view.

    UISegmentedControl * segmentedControl = [[[UISegmentedControl alloc] initWithItems:@[@"左视图",@"右视图"]]autorelease];

    segmentedControl.frame = CGRectMake(20, 50, kScreenWidth-40, 30);

    //设置分段的默认选中下标

    segmentedControl.selectedSegmentIndex = 0;

    segmentedControl.tag = 100;

    [segmentedControl addTarget:self action:@selector(handleSegmentedControlAction:)  forControlEvents:UIControlEventValueChanged];

    [self.view addSubview:segmentedControl];

    

    //视图的宽度和间距

    CGFloat viewWidth = 120;

    CGFloat viewHeight = 200;

    CGFloat offsetX = (kScreenWidth-viewWidth*2) / 3;

    for (int i = 0; i < 2; i++) {

        UIView *aView = [[[UIView alloc]initWithFrame:CGRectMake(offsetX + (viewWidth +offsetX) * i, 120, viewWidth, viewHeight)] autorelease];

        aView.backgroundColor = i ? [UIColor greenColor] : [UIColor redColor];

        aView.tag = 200 + i;//加tag

        [self.view addSubview:aView];

     }

    

    NSArray *colors = @[[UIColor redColor],[UIColor greenColor],[UIColor blueColor]];

    CGFloat offsetY = 20;//纵向偏移量

    for (int i = 0; i < 3; i++) {

        UISlider *aSlider = [[[UISlider alloc] initWithFrame:CGRectMake(20, 400+(40+offsetY)*i, kScreenWidth-40, 40)]autorelease];

        aSlider.minimumValue = 0;

        aSlider.maximumValue = 1;

        aSlider.value = 0;

        aSlider.minimumTrackTintColor = colors[i];

        aSlider.thumbTintColor = colors[i];

        aSlider.tag = 300 + i;

        [aSlider addTarget:self action:@selector(handleSliderAction:) forControlEvents:UIControlEventValueChanged];

        [self.view addSubview:aSlider];   

    }

    

    UISwitch *aSwitch = [[[UISwitch alloc] initWithFrame:CGRectMake(30, kScreenHeight - 80, 0, 0)] autorelease];

    aSwitch.on = NO;

    [aSwitch addTarget:self action:@selector(handleSwitchAction:) forControlEvents:UIControlEventValueChanged];

    aSwitch.tag = 400;

    [self.view addSubview:aSwitch];

    

    UIStepper *aStepper = [[[UIStepper alloc] initWithFrame:CGRectMake(kScreenWidth - 130, kScreenHeight - 80, 0, 0)] autorelease];

    aStepper.minimumValue=200;//计步器的最小值为视图的原始高度

    aStepper.maximumValue = 280;//最终高度

    aStepper.stepValue = 5;//每次增加的值

    aStepper.value = 200;//计步器的当前值

    aStepper.tag = 500;

    [aStepper addTarget:self action:@selector(handleStepperAction:) forControlEvents:UIControlEventValueChanged];

    [self.view addSubview:aStepper];

    [self handleSegmentedControlAction:segmentedControl];

}

-(void)handleSegmentedControlAction:(UISegmentedControl *)sender{

    UISlider *redSlider = (UISlider *)[self.view viewWithTag:300];

    UISlider *greenSlider = (UISlider *)[self.view viewWithTag:301];

    UISlider *blueSlider = (UISlider *)[self.view viewWithTag:302];

    UISwitch *aSwitch = (UISwitch *)[self.view viewWithTag: 400];

    UIStepper *aStepper = (UIStepper *)[self.view viewWithTag:500];

    UIView *currentView = [self.view viewWithTag:200+sender.selectedSegmentIndex];

//    aSwitch.on = currentView.hidden;

    [aSwitch setOn:currentView.hidden animated:YES];

    aStepper.value = CGRectGetHeight(currentView.frame);

   

    CGFloat red, green, blue;

    [currentView.backgroundColor getRed:&red green:&green blue:&blue alpha:nil];

    redSlider.value = red;

    greenSlider.value = green;

    blueSlider.value = blue;

}

-(void)handleSliderAction:(UISlider *)sender{

    //得到三个滑杆的当前值，作为颜色三原色红绿蓝的色值

    CGFloat red = [(UISlider *)[self.view viewWithTag:300] value];

    CGFloat green = [(UISlider *)[self.view viewWithTag:301] value];

    CGFloat blue = [(UISlider *)[self.view viewWithTag:302] value];

    //通过segmentedControl当前选中的下标来获取被改变的视图

    UISegmentedControl *segmentedControl = (UISegmentedControl *)[self.view viewWithTag:100];

    UIView *currentView = [self.view viewWithTag:200+segmentedControl.selectedSegmentIndex];

    //设定设图的背景颜色

    currentView.backgroundColor = [UIColor colorWithRed:red green:green blue:blue alpha:1];

}

-(void)handleSwitchAction:(UISwitch *)sender{

    UISegmentedControl *segmentedControl = (UISegmentedControl *)[self.view viewWithTag:100];

    UIView *currentView = (UIView *)[self.view viewWithTag:200+segmentedControl.selectedSegmentIndex];

    currentView.hidden = sender.on;

}

-(void)handleStepperAction:(UIStepper *)sender{

    UISegmentedControl *segmentedControl = (UISegmentedControl *)[self.view viewWithTag:100];

    UIView *currentView = (UIView *)[self.view viewWithTag:200+segmentedControl.selectedSegmentIndex];

    CGRect frame = currentView.frame;

    frame.size.height = sender.value;

    currentView.frame = frame;

}