1 前言
UIProgressView控件用來顯示進度條描述某個任務的進度。

2 代碼實例
ZYViewController.h：

[plain] view plaincopyprint?#import <UIKit/UIKit.h> 
 
@interface ZYViewController : UIViewController 
 
@property(nonatomic,strong) UIProgressView *progressView; 
 
@end 

#import <UIKit/UIKit.h>

@interface ZYViewController : UIViewController

@property(nonatomic,strong) UIProgressView *progressView;

@end
ZYViewController.m:

[plain]
@synthesize progressView; 
 
- (void)viewDidLoad 
{ 
    [super viewDidLoad]; 
    // Do any additional setup after loading the view, typically from a nib. 
    self.view.backgroundColor = [UIColor whiteColor]; 
    self.progressView = [[UIProgressView alloc] initWithProgressViewStyle:UIProgressViewStyleBar];//初始化條狀進度條 
    self.progressView.center = self.view.center; 
    self.progressView.progress = 0.5f;//設置進度條進度為50% 
    [self.view addSubview:self.progressView]; 
} 

@synthesize progressView;

- (void)viewDidLoad
{
    [super viewDidLoad];
 // Do any additional setup after loading the view, typically from a nib.
    self.view.backgroundColor = [UIColor whiteColor];
    self.progressView = [[UIProgressView alloc] initWithProgressViewStyle:UIProgressViewStyleBar];//初始化條狀進度條
    self.progressView.center = self.view.center;
    self.progressView.progress = 0.5f;//設置進度條進度為50%
    [self.view addSubview:self.progressView];
}
運行結果：