UISegmentControl 、UIStepper

• UISegmentControl

1.    UISegmentedControl *segmentControl = [[UISegmentedControl alloc] initWithItems:@[@"1",@"2",@"3",@"4"]];
2.segmentControl.frame = (CGRect){50,100,100,50};

等同于

1.    UISegmentedControl *segmentControl = [[UISegmentedControl alloc]
2.                                          initWithFrame:CGRectMake(50, 100, 100, 50)];
3.
4.    [segmentControl insertSegmentWithTitle:@"1" atIndex:0 animated:YES];
5.    [segmentControl insertSegmentWithTitle:@"2" atIndex:1 animated:YES];
6.    [segmentControl insertSegmentWithTitle:@"3" atIndex:2 animated:YES];
7.    [segmentControl insertSegmentWithTitle:@"4" atIndex:3 animated:YES];

其监听事件是值改变事件

1.    [segmentControl addTarget:self action:@selector(valueChange:)
2.             forControlEvents:UIControlEventValueChanged];

1.-(void)valueChange:(UISegmentedControl *)sender{
2.
3.    UIColor *red = [UIColor redColor];
4.    UIColor *green = [UIColor purpleColor];
5.    UIColor *purple = [UIColor greenColor];
6.    UIColor *gray = [UIColor grayColor];
7.
8.    NSArray *array = @[red,green,purple,gray];
9.
10.    NSInteger index = sender.selectedSegmentIndex;
11.    self.view.backgroundColor = array[index];
12.}

• UIStepper

  • 简单了解一些属性
    

    1.@property(nonatomic) double value;                        // default is 0. sends UIControlEventValueChanged. clamped to min/max
    2.@property(nonatomic) double minimumValue;                 // default 0. must be less than maximumValue
    3.@property(nonatomic) double maximumValue;                 // default 100. must be greater than minimumValue
    4.@property(nonatomic) double stepValue;                    // default 1. must be greater than 0
    5.