1 前言
UISlider控件允許用戶用一個簡單只管的界面來在一個范圍內選擇一個值。
2 代碼實例
ZYViewController.h:
[plain]
#import <UIKit/UIKit.h>
@interface ZYViewController : UIViewController
@property(nonatomic,strong) UISlider *mySlider;
@end
#import <UIKit/UIKit.h>
@interface ZYViewController : UIViewController
@property(nonatomic,strong) UISlider *mySlider;
@end
ZYViewController.m:
[plain]
@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)];
mySlider.center = self.view.center;
self.mySlider.minimumValue = 0.0f;//滑動條的最小值
self.mySlider.maximumValue = 100.0f;//滑動條的最大值
self.mySlider.value = mySlider.maximumValue/2.0;//滑動條的當前值
[mySlider addTarget:self action:@selector(sliderValueChanged:) forControlEvents:UIControlEventValueChanged];//添加滑動事件
mySlider.continuous = NO;//設置只有在離開滑動條的最後時刻才觸發滑動事件
[mySlider setThumbImage:[UIImage imageNamed:@"slider.png"] forState:UIControlStateHighlighted];//設置滑動的時候顯示的圖片
[self.view addSubview:mySlider];//添加視圖
}
//添加滑動事件
-(void)sliderValueChanged:(UISlider *)paramSender{
if ([paramSender isEqual:self.mySlider]) {
NSLog(@"New value=%f",paramSender.value);
}
}
@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)];
mySlider.center = self.view.center;
self.mySlider.minimumValue = 0.0f;//滑動條的最小值
self.mySlider.maximumValue = 100.0f;//滑動條的最大值
self.mySlider.value = mySlider.maximumValue/2.0;//滑動條的當前值
[mySlider addTarget:self action:@selector(sliderValueChanged:) forControlEvents:UIControlEventValueChanged];//添加滑動事件
mySlider.continuous = NO;//設置只有在離開滑動條的最後時刻才觸發滑動事件
[mySlider setThumbImage:[UIImage imageNamed:@"slider.png"] forState:UIControlStateHighlighted];//設置滑動的時候顯示的圖片
[self.view addSubview:mySlider];//添加視圖
}
//添加滑動事件
-(void)sliderValueChanged:(UISlider *)paramSender{
if ([paramSender isEqual:self.mySlider]) {
NSLog(@"New value=%f",paramSender.value);
}
}運行結果:
初始狀態:
滑動時候: