使用UISlider實現指定范圍選擇
創建一個滑動條並且把它放在試圖控制器的視圖中。
@interface SliderView:UIViewController
@property(non atomic,strong)UISlider *mySlider;
@end
@synthesize mySlider;
-(void)viewDidLoad{
[super viewDidLoad];
self.view.backgroundColor = [UIColor whiteColor];
self.mySlider = [ [UISlider alloc] initWithFrame:CGRectMake(0.0f,0.0f,200.0f,23.0f)];
self.mySlider.center = self.view.center;
self.mySlider.minimumValue = 0.0f;//選擇范圍的最小值
self.mySlider.maximumValue= 100.0f;//選擇范圍的最大值
self.mySlider.value = self.mySlider.maximumValue / 2.0;//當前值
self.mySlider.continuous = NO;//默認YES，若為YES，thumb滑動時會連續調用slider d target。
[self.mySlider addTarget:self action:@selecter(sliderValueChanged:) forControlEvents:UIControlEventValueChanged];
[self.view addSubView:self.mySlider];
}
slider上的小滑塊叫做thumb；
target
-(void)sliderValueChanged:(UISlider *)paramSender{
if([paramSender isEqual:self.mySlider]){
NSLog(@"%@",paramSender.value);
}
}
slider 的 thumb 圖片選中設置
setThumbImage:forState:方法
UIControlStateNormal //正常狀態下的thumb ，即沒有點擊的。
UIControlStateHighlighted //選中狀態的thumb，即用戶點擊thumb時顯示的圖片
[self.mySlider setThumbImage:[UIImage imaged:@"ThumbNormal.png"] forState:UIControlStateNormal];
[self.mySlider setThumbImage:[UIImage imaged:@"ThumbHighlighted.png"] forState:UIControlStateHighlighted];
UISegmentedControl 做簡單選項分組
@interface SegmentedControl ：UIViewController
@property(non atomic,strong)UISegmentedControl *mySegmentedControl;
@end;
@synthesize mySegmentedControl;
-(void)viewDidLoad{
[super viewDidLoad];
self.view.backgrounderColor = [UIColor whiteColor];
NSArray *segments = [[NSArray alloc] initWithObjects:@"iPhone",@"iPad",nil];
self.mySegmentedControl = [[UISegmentedControl alloc]initWithItems:segments];
self.mySegmentedControl.center = self.view.center;
[self.view addSubview:self.mySegmentedControl];
}