Popup UIPickerView

Question

我知道很多人都問過同樣的問題，我已經嘗試了很多，我不知道我錯過了什麼部分，我仍然可以使它工作。

我有一個9 * 9的表格，我想要顯示和更改，由於Iphone屏幕的大小，我正在考慮一次顯示一列。 我想要的是按左上角的按鈕和UIPickerView將彈出允許我選擇要顯示的列，然後重新加載UITextFields。

任何人都可以給我一個詳細的答案？我在這個（幾個月）還是比較新的。 預先感謝您。

UIActionSheet *actionSheet = [[UIActionSheet alloc] initWithTitle:nil 
               delegate:nil 
               cancelButtonTitle:nil 
               destructiveButtonTitle:nil 
               otherButtonTitles:nil]; 

[actionSheet setActionSheetStyle:UIActionSheetStyleBlackTranslucent]; 

CGRect pickerFrame = CGRectMake(0, 40, 0, 0); 

UIPickerView *pickerView = [[UIPickerView alloc] initWithFrame:pickerFrame]; 
pickerView.showsSelectionIndicator = YES; 
pickerView.dataSource = self; 
pickerView.delegate = self; 

[actionSheet addSubview:pickerView]; 


UISegmentedControl *closeButton = [[UISegmentedControl alloc] initWithItems:[NSArray  arrayWithObject:@"Close"]]; 
closeButton.momentary = YES; 
closeButton.frame = CGRectMake(260, 7.0f, 50.0f, 30.0f); 
closeButton.segmentedControlStyle = UISegmentedControlStyleBar; 
closeButton.tintColor = [UIColor blackColor]; 
[closeButton addTarget:self action:@selector(dismissActionSheet:) forControlEvents:UIControlEventValueChanged]; 
[actionSheet addSubview:closeButton]; 
[closeButton release]; 

[actionSheet showInView:[[UIApplication sharedApplication] keyWindow]]; 

[actionSheet setBounds:CGRectMake(0, 0, 320, 485)]; 

上面是我找到的代碼，好嗎彈出，我已經加入的問題陣列pickerview，任何人都可以告訴我dismissActionSheet方法應該如何？ 謝謝。

Answer 1

好的，所以我想我明白你在問什麼，糾正我，如果這不是你需要幫助...但是要添加一個數組（大概NSStrings）到選擇器視圖你需要使用- (NSString *)pickerView:titleForRow:forComponent:委託方法。這裏是一個快速examle：

//Say you have an array of strings you want to present in the pickerview like this 
NSArray *arrayOfStrings = [NSArray arrayWithObjects:@"One", @"Two", @"Three", @"Four", nil]; 

//First we need to say how many rows there will be in the pickerview 
- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component { 
    return [arrayOfStrings count]; 
} 

//Do the same for components (columns) in pickerview 
    - (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView { 
    return 1; 
} 
//Here we set the actual title/string on the pickerview 
- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component{ 
    if(component==0){ 
     //Grab the nth string from array 
     return [arrayOfStrings objectAtIndex:row]; 
    } 
} 
//This is called if a user taps a row 
- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component{ 
    if(component==0) 
    NSLog(@"The User Selected the row titled %@", [arrayOfStrings objectAtIndex:row]); 
} 

Similairly與actionsheet，您需要在用戶點擊了actionsheet按鈕

- (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex{ 
    if(buttonIndex==0){ 
     NSLog(@"First Button Clicked"); 
    } else if(buttonIndex == 1){ 
     NSLog(@"Second Button Clicked"); 
    } 
}