【iphone】开发视频教程2里面的代码

VideoProject2ViewController.h

//
//  VideoProject2ViewController.h
//  VideoProject2
//
//  Created by stu56 on 11-10-11.
//  Copyright 2011 __MyCompanyName__. All rights reserved.
//

#import <UIKit/UIKit.h>

@interface VideoProject2ViewController : UIViewController {
	
	IBOutlet  UISlider *slider ; 
	IBOutlet  UILabel *label ; 
	

}


@property (nonatomic,retain) IBOutlet  UISlider *slider ;
@property (nonatomic,retain)  IBOutlet UILabel *label ; 


-(IBAction) sliderChanged:(id) sender ; 

@end

VideoProject2ViewController.m

//
//  VideoProject2ViewController.m
//  VideoProject2
//
//  Created by stu56 on 11-10-11.
//  Copyright 2011 __MyCompanyName__. All rights reserved.
//

#import "VideoProject2ViewController.h"

@implementation VideoProject2ViewController


@synthesize slider;
@synthesize label ; 

 
-(IBAction) sliderChanged:(id) sender {
	UISlider *s = (UISlider *)sender ; 
	
	
	NSString *text =[NSString stringWithFormat:@"%3.2f", s.value];
	label.text = text;
	
	
}





/*
// The designated initializer. Override to perform setup that is required before the view is loaded.
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}
*/

/*
// Implement loadView to create a view hierarchy programmatically, without using a nib.
- (void)loadView {
}
*/


/*
// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad {
    [super viewDidLoad];
}
*/


/*
// Override to allow orientations other than the default portrait orientation.
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
    // Return YES for supported orientations
    return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
*/

- (void)didReceiveMemoryWarning {
	// Releases the view if it doesn't have a superview.
    [super didReceiveMemoryWarning];
	
	// Release any cached data, images, etc that aren't in use.
}

- (void)viewDidUnload {
	// Release any retained subviews of the main view.
	// e.g. self.myOutlet = nil;
}


- (void)dealloc {
	
	[slider release];
	[label release];
	
    [super dealloc];
}

@end