ios - 无法使用我的字符串填充 PickerView

Question

我使用 inputView 在单击文本字段时显示 pickerView。然后我想用数字 1-100 填充 pickerview。我有一些我认为可以工作的代码，但是当我运行程序并单击文本字段时，它只会弹出一个空的选择器 View 。还需要知道如何在工具栏上放置另一个按钮。我想在右侧有一个提交按钮来确认用户的选择(将更改完成以取消)我必须在界面生成器中使用选择器和按钮执行某些操作吗？因为我实际上在界面生成器中没有这些，因为它们是用代码制作的......

下面是我的 .h 和 .m 文件。

.h----

@interface TestinputviewViewController : UIViewController <UITextFieldDelegate,UIPickerViewDataSource,UIPickerViewDelegate> {

IBOutlet UITextField *textField;
NSMutableArray *pickerViewArray;
}
-(IBAction) textFieldDidBeginEditing;
@end

.m---

 #import "TestinputviewViewController.h"

@implementation TestinputviewViewController


-(IBAction)textFieldDidBeginEditing{


UIPickerView *myPickerView = [[UIPickerView alloc] init];
textField.inputView = myPickerView;
myPickerView.showsSelectionIndicator = YES;
myPickerView.delegate = self;
myPickerView.dataSource = self;
    [myPickerView release];


UIToolbar *myToolbar = [[UIToolbar alloc] initWithFrame:CGRectMake(0,0,320,44)];
                        UIBarButtonItem *doneButton =     [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self   action:@selector(inputAccessoryViewDidFinish)];
[myToolbar setItems:[NSArray arrayWithObject:doneButton] animated:NO];
                        textField.inputAccessoryView =     myToolbar; 

}   



-(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)myPickerView {
return 1;
}

-(NSInteger)pickerView:(UIPickerView *) myPickerView numberOfRowsInComponent: (NSInteger)component {
return [pickerViewArray count];
}

-(NSString *)pikerView:(UIPickerView *) myPickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component {
return [pickerViewArray objectAtIndex:row];
}


// Implement viewDidLoad to do additional setup after loading the view, typically from a     nib.
- (void)viewDidLoad {
[super viewDidLoad];

pickerViewArray = [[NSMutableArray alloc] init];
for (int i = 1; i<=20; i++) {
    NSString *myString = [NSString stringWithFormat:@"%d%",i];
    [pickerViewArray addObject:myString];

}
}

Answer 1

您没有将选择器的委托(delegate)设置为当前对象类。

使用

`myPickerView.delegate = self;`

 `myPickerView.dataSource = self;`

分配选取器 View 对象后。

继续..