【学习ios之路:UI系列】ios中常见的几种控件.(UISlider,UISwitch,UIStepper,UISegmentedControl)

一.滑块控件(UISlider)  效果如下

注:系统原来效果如下

具体功能运用:

①创建滑块控件(UISlider),设置控件大小,并添加到window视图上,后释放

 UISlider *slider = [[UISlider alloc] initWithFrame:CGRectMake(20, 30, 280, 100)];
 [self.window addSubview:slider];
 [slider release];

    //设置最大值10
    [slider setMaximumValue:10];
    //设置最小值0
    [slider setMinimumValue:0];
    slider.value = 5;//当前位置是4.显示效果如上图.

  slider.minimumTrackTintColor = [UIColor orangeColor];//设置移动前线条的颜色
  slider.maximumTrackTintColor = [UIColor blackColor];//设置移动后线条的颜色
    

slider.minimumValueImage = [UIImage imageNamed:@"[email protected]"];//设置滚动条最左边的图片
slider.maximumValueImage = [UIImage imageNamed:@"[email protected]"];//设置滚动条最右边的图片

slider.thumbTintColor = [UIColor grayColor];//设置中间按钮移动按钮的颜色

[slider setThumbImage:[UIImage imageNamed:@"[email protected]"] forState:UIControlStateNormal];

1).触发状态为:UIControlEventValueChanged,当触发时,slider.value的值会随之改变

2)当UISlider的进度值发生改变时,会自动调用self的function:方法,并且将UISlider作为第一个参数传入.

 [slider addTarget:self action:@selector(function:) 
                                       forControlEvents:UIControlEventValueChanged];

//设置轴迹图片
- (void)setMinimumTrackImage:(UIImage *)image forState:(UIControlState)state;
- (void)setMaximumTrackImage:(UIImage *)image forState:(UIControlState)state;
//通过状态获取点击按钮的图片
- (UIImage *)thumbImageForState:(UIControlState)state;
//通过事件触发状态获取足迹图片.
- (UIImage *)minimumTrackImageForState:(UIControlState)state;
- (UIImage *)maximumTrackImageForState:(UIControlState)state;

//获取当前状态时的对应要的图片
UIImage *image = slider.currentThumbImage; 
<span style="font-size:18px;"></span><pre name="code" class="objc">UIImage *image = slider.currentMinimumTrackImage; 

开关控件的常见操作:

①创建开关控件,设置大小,添加到视图上,并释放

UISwitch *switchView = [[UISwitch alloc] initWithFrame:CGRectMake(50, 100, 280, 100)];
[self.window addSubview:switchView];
[switchView release];

BOOL setting =  switchView.isOn;//获得开关状态
[switchView setOn:setting animated:YES];//设置开关状态

  //<span style="font-size:14px;">开关控件切换槽<span class="s6"> </span>颜色</span>.如将上面的绿色替换成橘黄色
  switchView.onTintColor = [UIColor orangeColor];
  //设置按钮的颜色
  switchView.thumbTintColor = [UIColor redColor];
  //<span style="font-size:14px;">开关控件外部的颜色</span>
  switchView.tintColor = [UIColor purpleColor];

switchView.onImage = [UIImage imageNamed:@"[email protected]"];
    
switchView.offImage = [UIImage imageNamed:@"[email protected]"];
    

[switchView addTarget:self action:@selector(switchTag:)
                                   forControlEvents:UIControlEventValueChanged];

- (void)switchTag:(UISwitch *)switchTag {     
        BOOL setting = switchTag.isOn;
        [swithch setOn:setting animated:YES];
        if (setting)
        {
            NSLog(@"on");
        }else
        {
            NSLog(@"off");
        }
  }

创建功能如下

①创建计数器控件,并释放

UIStepper *step = [[UIStepper alloc] init];
step.frame = CGRectMake(50, 300, 300, 300);
[self.window addSubview:step];
[step release];

   每按一次减号，value就会自动减去一定的数值(数值大小由stepValue决定)
   每按一次加号，value就会自动增加一定的数值(数值大小由stepValue决定)

    step.maximumValue = 1;
    step.minimumValue = 0.1;
    step.stepValue = 0.1;//每次增减的值

step.continuous = YES;//默认是yes
step.wraps = YES;//判断是否循环,即到最大值后又从最小值开始.

 step.tintColor = [UIColor purpleColor];//设置按钮的颜色;
 [step setBackgroundColor:[UIColor orangeColor]];//设置背景颜色
 [step setBackgroundImage:[UIImage imageNamed:@"[email protected]"]
                                               forState:UIControlStateNormal];

//设置背景图片,再某个状态时
- (void)setBackgroundImage:(UIImage*)image forState:(UIControlState)state 
//在某个状态时,获取背景图片,
- (UIImage*)backgroundImageForState:(UIControlState)state

 [step addTarget:self action:@selector(stepTag:) 
                                 forControlEvents:UIControlEventValueChanged];
//事件响应方法实现
- (void)stepTag:(UIStepper *)stepper {
    [self.window viewWithTag:200].alpha = stepper.value;
} 

实现操作如下:

   NSArray *arr = [NSArray arrayWithObjects:
                       @"轻拍", @"长按", @"轻扫", @"平移", @"捏合", @"旋转", nil];
    UISegmentedControl *segmentedControl = [[UISegmentedControl alloc] 
                                                         initWithItems:arr];
    segmentedControl.frame = CGRectMake(10, 40, 300, 40);
    [segmentedControl addTarget:self action:@selector(function:) 
                             forControlEvents:UIControlEventValueChanged];
    [self.window addSubview:segmentedControl];
    
   

- (void)removeSegmentAtIndex:(NSUInteger)segment animated:(BOOL)animated;
- (void)removeAllSegments;//输出所有选项卡
  <span style="font-size:18px;"></span><pre name="code" class="objc"> segmentedControl.tintColor = [UIColor orangeColor];//设置边框颜色
    <span style="font-size:18px;"></span><pre name="code" class="objc"><pre name="code" class="objc"> NSInteger count  = segmentedControl.numberOfSegments;//计算个数