UI常用控制項，ui控制項

UI常用控制項，ui控制項

//建立警告框對象

UIAlertView *alertView=[[UIAlertView alloc]initWithTitle:@"警告!" message:@"您確定退出嗎？"  delegate:self cancelButtonTitle:@"取消" otherButtonTitles:@"確定",@"繼續",@"查看",nil];

//顯示警告框

[alertView show];

 

//需要在.h裡遵守UIAlertViewDelegate協議並且實現協議裡面方法

- (void)alertView:(UIAlertView *)alertView clickedButtonAtIndex:(NSInteger)buttonIndex

{

    //通過buttonIndex參數，可以區分點擊的為哪個按鈕

    NSLog(@"%i",buttonIndex);

}

(2)

//建立ActionSheet對象

UIActionSheet *actionSheet=[[UIActionSheet alloc]initWithTitle:nil delegate:self cancelButtonTitle:@"取消" destructiveButtonTitle:@"刪除圖片" otherButtonTitle:nil,nil];

//添加到self.view上

[actionSheet showInView:self.view];

//也需要在.h檔案中遵守UIActionSheetDelegate協議實現協議裡面的方法

- (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex

{

    NSLog(@"%i",buttonIndex);

}

 (3)

//建立步進器對象

UIStepper *stp=[[UIStepper alloc]initWithFrame:CGRectMake(100,100,100,0)

[self.view addSubview:stp];

//設定步進器的最大值和最小值

stp.maximumValue=10;

stp.minimumValue=0;

//設定步進器的幅度 預設為一

stp.stepValue=2;

[stp addTarget:self action:@selector(stpClick:) forControlEvents:UIControlEventValueChanged];

//建立進度條對象

//進度不能設定最大和最小值

//進度條的取值範圍0~1

UIProgressView *p=[[UIProgressView alloc]initWithFrame:CGRectMake(10,150,300,10)];

p.tag=200;

[self.view addSubview:p];

//p.progress設定進度條進度

 

（4）

NSArray *arr=@[@"菜單",@"購物車",@"結賬",@"單價"];

UISegmentedCotrol *seg=[[UISegmentControl alloc]initWithItems:arr];

[self.view addSubview:seg];

seg.frame=CGRectMake(100,100,200,30);

//設定預設選中的位置

seg.selectedSegmentIndex=1;

//向segment控制項中添加按鈕

[seg insertSegmentWithTitle:@"數量" atIndex=1 animated:YES];

//給segment控制項添加事件

[seg addTarget:self action:@selector(segChange:) forControlEvents:UIControlEventValueChanged];

-(void)segChange:(UISegmentedControl*)sg

{

    NSLog(@"%i",sg.selectedSegmentIndex);;

}

 (5)

UISlider *slider=[[UISlider alloc]initWithFrame:CGRectMake(10,200,300,30)];

[self.view addSubview:slider];

//設定劃條最大值

slider.maximumValue=50;

//設定劃條最小值

slider.minimunValue=0;

//給 劃條添加滑動事件

[slider addTarget:self action:@selector(sliderChange:) forControlEvents:UIControlEventValueChanged];

//滑動結束後調用方法

slider.continuous=NO;

//設定左右兩側的滑條顏色

slider.minimumTrackTintColor=[UIColor redColor];

slider.maxmumTrackTintColor=[UIColor blueColor];

//設定滑條左右圖片

slider.maximumValueImage=[UIImage imageNamed:@"b.png"];

slider.minimumValueImage=[UIImage imageNamed:@"a.png"];

-(void)sliderChange:(UISlider *)s

{

    NSLog(@"%f",s.value);

}

 

(6)

//建立開關控制項對象

UISwitch *sw=[[UISwitch alloc]initWithFrame:CGRectMake(100,100,0,0);

[self.view addSubview:sw];

//設定開關處於開的狀態

[sw setOn:YES];

[sw addTarget:self action:@selector(swChange:) forControlEvents:UIControlEventValueChanged];

 

//建立UIActivityIndicatorView對象，用於網路載入

UIActivityIndicatorView *act=[[UIActivityIndicatorView alloc]initWithActivityIndicatorStyle:UIActivityIndicatorViewStyleWhite];

act.frame=CGRectMake(100,150,100,100);

[self.view addSubview:act];

act.tag=100;

//開始載入

[act startAnimating];

 

 

-(void)swChange:(UISwitch*)sw

{

    

    UIActivityIndicatorView *act=(UIActivityIndicatorView *)[self.view viewWithTag:100];

  

    if (sw.isOn) {

        [act startAnimating];

        NSLog(@"on");

    }

    else

    {

        //停止載入

        [act stopAnimating];

        NSLog(@"off");

    }

    

    

}

 （7）

//建立網頁載入控制項對象

UIWebView *webView=[[UIWebView alloc]initWithFrame:CGRectMake(20,90,220,220)];

webView.backgroundColor=[UIColor redColor];

[self.view addSubview:webView];

webView.tag=200;

 

 

-(void)btnClick:(UIButton *)bt

{
//獲得文字框對象

UITextField *textField=(UITextField *)[self.view viewWithTag:100];

//獲得文字框中的網址

NSString *strURL=textField.text;

//獲得webView對象

UIWebView *webView=(UIWebView *)[self.view viewWithTag：200];

NSURL *url=[NSURL URLWithString:strURL];

//封裝網路請求類

NSURLRequest *request=[[NSURLRequest alloc]initWithURL:url];

//載入網路請求

[webView loadRequest:request];

}