IOS progressview的简单使用

head 代码。。 

 #import <UIKit/UIKit.h>

 @interface ViewController : UIViewController
 {
     UIProgressView *progressview;
     UIProgressView *progressviewbar;
     NSTimer *timer;
 }
 @property(retain,nonatomic)
 IBOutlet UIProgressView *progressview;
 @property(retain,nonatomic)
 IBOutlet UIProgressView *progressviewbar;

 -(IBAction)startprogress:(id)sender;
 -(IBAction)stopprogress:(id)sender;

 @end

m 代码 

 #import "ViewController.h"

 @interface ViewController ()

 @end

 @implementation ViewController
 @synthesize progressview;
 @synthesize progressviewbar;
 - (void)viewDidLoad
 {
     [super viewDidLoad];

     // Do any additional setup after loading the view, typically from a nib.
 }

 - (void)didReceiveMemoryWarning
 {
     [super didReceiveMemoryWarning];
     // Dispose of any resources that can be recreated.
 }
 /* 启动进度条 */
 -(IBAction)startprogress:(id)sender{
     timer = [NSTimer scheduledTimerWithTimeInterval:0.03f target:self selector:@selector(timeChanged:) userInfo:nil repeats:YES];

     /*
      启动一个定时器，间隔时间为0.03s，间隔0.03s即调用self里边的timechanged方法
      */

 }
 /* 停止进度条，进度都置为零*/
 -(IBAction)stopprogress:(id)sender{
     [timer invalidate];
 //    [timer release];
     timer = nil;
     self.progressview.progress=0.0f;
     self.progressviewbar.progress=0.0f;
 }
 /* 进度条进度+0.01*/
 -(IBAction)timeChanged:(id)sender{

     self.progressview.progress +=0.01f;
     self.progressviewbar.progress+=0.01f;
 }
 @end