如何使用UIPicker與多個文本字段

Question

我可以從一個選擇器獲取文本框值到一個文本框。我如何獲得更多文本框的不同值。目前，即使只填寫一個文本框並僅顯示第一個NSArray的值，所有文本字段都會被填充。我試過if聲明，Apple文檔沒有太大的幫助。

我不知道如何標記工作，但指出它在研究這一點時被提及。道歉，如果我沒有解釋這個正確繼承人一個測試應用程序下載，如果我havnt做太大的意義，說明它更好

APP example

.H

#import <UIKit/UIKit.h> 

@interface ViewController : UIViewController <UIPickerViewDataSource, UIPickerViewDelegate,UITextFieldDelegate> 

{ 
//decalre picker 
UIPickerView *select; 



//declare NSArrray 
NSArray *arrStatus; 
NSArray *arrStatus2; 


} 

@property (strong, nonatomic) IBOutlet UITextField *text1; 
- (IBAction)Value:(id)sender; 
@property (strong, nonatomic) IBOutlet UITextField *text2; 
@end 

.M

 - (void)viewDidLoad 
{ 



///create picker////////////////////////////////////////////////////////////////////////// 

select = [[UIPickerView alloc] initWithFrame:CGRectZero]; 
select.delegate = self; 
select.dataSource = self; 
[select setShowsSelectionIndicator:YES]; 
text1.inputView = select; 
text2.inputView = select; 



////arrays & objects 
arrStatus = [[NSArray alloc] initWithObjects:@"1",@"2",@"3",@"4",nil]; 
arrStatus2 = [[NSArray alloc] initWithObjects:@"A",@"B",@"C",@"D",nil]; 

//number of colums and rows etc of picker  
} 
-(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView 
{ 
//One column 
return 1; 
} 

-(NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent: (NSInteger)component 
{ 
//set number of rows 
return arrStatus.count; 
return arrStatus2.count; 

    } 

    -(NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component 
{ 
//set item per row 
return [arrStatus objectAtIndex:row]; 
return [arrStatus2 objectAtIndex:row]; 


- (IBAction)Value:(id)sender { 

///get picker values to text field 
NSInteger selectedRow = [select selectedRowInComponent:0]; 

text1.text = [arrStatus objectAtIndex: selectedRow]; 
[text1 resignFirstResponder]; 

text2.text = [arrStatus2 objectAtIndex: selectedRow]; 
[text2 resignFirstResponder]; 


} 

@end 

Answer 1

在didselectrow的方法我有我的if語句看哪個文本字段是第一響應者。然後使用下面的代碼。它將uipicker的值放在每個文本字段中。

-(void) pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component 
{ 
if ([_input1 isFirstResponder]) 
{ 
    NSString *resultString1 = [[NSString alloc] initWithFormat:[gradeArray objectAtIndex:[pickerView selectedRowInComponent:0]]]; 
    NSString *resultString2 = [[NSString alloc] initWithFormat:[plusMinusArray objectAtIndex:[pickerView selectedRowInComponent:1]]]; 
    NSString *gradeResult = [resultString1 stringByAppendingString:resultString2]; 
    _input1.text = gradeResult; 
}else if ([_input2 isFirstResponder]) 
{ 
    NSString *resultString1 = [[NSString alloc] initWithFormat:[gradeArray objectAtIndex:[pickerView selectedRowInComponent:0]]]; 
    NSString *resultString2 = [[NSString alloc] initWithFormat:[plusMinusArray objectAtIndex:[pickerView selectedRowInComponent:1]]]; 
    NSString *gradeResult = [resultString1 stringByAppendingString:resultString2]; 
    _input2.text = gradeResult; 
}else if ([_inputM isFirstResponder]) 
{ 
    NSString *resultString1 = [[NSString alloc] initWithFormat:[gradeArray objectAtIndex:[pickerView selectedRowInComponent:0]]]; 
    NSString *resultString2 = [[NSString alloc] initWithFormat:[plusMinusArray objectAtIndex:[pickerView selectedRowInComponent:1]]]; 
    NSString *gradeResult = [resultString1 stringByAppendingString:resultString2]; 
    _inputM.text = gradeResult; 
}else if ([_input3 isFirstResponder]) 
{ 
    NSString *resultString1 = [[NSString alloc] initWithFormat:[gradeArray objectAtIndex:[pickerView selectedRowInComponent:0]]]; 
    NSString *resultString2 = [[NSString alloc] initWithFormat:[plusMinusArray objectAtIndex:[pickerView selectedRowInComponent:1]]]; 
    NSString *gradeResult = [resultString1 stringByAppendingString:resultString2]; 
    _input3.text = gradeResult; 
}else if ([_input4 isFirstResponder]) 
{ 
    NSString *resultString1 = [[NSString alloc] initWithFormat:[gradeArray objectAtIndex:[pickerView selectedRowInComponent:0]]]; 
    NSString *resultString2 = [[NSString alloc] initWithFormat:[plusMinusArray objectAtIndex:[pickerView selectedRowInComponent:1]]]; 
    NSString *gradeResult = [resultString1 stringByAppendingString:resultString2]; 
    _input4.text = gradeResult; 
} 
} 

希望這會有所幫助。

編輯，如果你想獲得在選擇器兩個數組

，你需要做的列2.這將顯示兩個數組。我使用下面的代碼在picker視圖中顯示我的數組。

-(NSInteger) numberOfComponentsInPickerView:(UIPickerView *)pickerView 
{ 
return 2; 
} 

-(NSInteger) pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component 
{ 
if (component == 0) 
{ 
    return [gradeArray count]; 
} 
return [plusMinusArray count]; 
} 

- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component 
{ 
if (component == 0) 
{ 
    return [gradeArray objectAtIndex:row]; 
} 
return [plusMinusArray objectAtIndex:row]; 
}