【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];

②设置最大值,最小值,以及开始时滑动条所在的位置

    //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.

③设置滑动条的颜色,即滑动前和滑动后的颜色

  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    

④设置滑动控件左右的图片

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

⑤设置手指点击时按钮的颜色

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

⑥将按钮换成图片,正常状态下

[slider setThumbImage:[UIImage imageNamed:@"[e-mail]"] forState:UIControlStateNormal];

⑦移动时触发的响应事件

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];

⑧其他功能

//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; 

UIImage *image = slider.currentMaximumTrackImage;

二. 开关控件(UISwitch) 效果如下

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];

②设置开关状态

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

③设置颜色

  //<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];

④设置图片( 在ios7 中无效果)

switchView.onImage = [UIImage imageNamed:@"[e-mail]"];    switchView.offImage = [UIImage imageNamed:@"[e-mail]"];    

⑤开关控件触发的事件处理

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

实现代码如下switchTag:

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

三. 计数器控件(UIStepper)效果如下

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];

②设置最大值和最小值,以及每次加减时的值

   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

③设置是否循环和是否连续

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

④设置颜色,如上图的紫色

 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:@"[e-mail]"]                                               forState:UIControlStateNormal];

⑤其它操作

//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

⑥数字控件的事件处理

 [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;} 

四. 选项卡控件UISegmentedControl,效果图如下

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];       

其他操作

- (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