我在 Xcode 4.4 中遇到了选择器视图的问题。我想用多个数组填充 1 Picker。我看了/阅读了很多教程,几乎可以开始工作了。这是我的代码:
*。H
#import <UIKit/UIKit.h>
@interface PickerView : UIViewController
<UIPickerViewDataSource,UIPickerViewDelegate>
{
IBOutlet UIPickerView *picker;
NSMutableArray *array_1;
NSMutableArray *array_2;
}
@property (strong, nonatomic) IBOutlet UIView *pickerContainer;
@property (strong, nonatomic) IBOutlet UITextField *textfield_1;
@property (strong, nonatomic) IBOutlet UITextField *textfield_2;
- (IBAction)showArray_1Picker:(id)sender;
- (IBAction)showArray_2Picker:(id)sender;
- (IBAction)hidePicker:(id)sender;
@end
*.m
#import "PickerView.h"
@interface PickerView ()
@end
@implementation PickerView
@synthesize pickerContainer;
@synthesize textfield_1;
@synthesize textfield_2;
int textFieldTouched = 0;
- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)picker
{
return 1;
}
- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent (NSInteger)component
{
switch(textFieldTouched)
{
case 1:
return [array_1 count];
break;
case 2:
return [array_2 count];
break;
default:
return 0;
}
}
- (NSString *)pickerView:(UIPickerView *)picker titleForRow:(NSInteger)row forComponent:(NSInteger)component
{
switch(textFieldTouched)
{
case 1:
return [array_1 objectAtIndex:row];
break;
case 2:
return [array_2 objectAtIndex:row];
break;
default:
return @"nothing";
}
}
- (void) pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component
{
switch(textFieldTouched)
{
case 1:
textfield_1.text = [array_1 objectAtIndex:[pickerView selectedRowInComponent:0]];
break;
case 2:
textfield_2.text = [array_2 objectAtIndex:[pickerView selectedRowInComponent:0]];
break;
}
}
- (void)viewDidLoad
{
array_1 = [[NSMutableArray alloc] init];
[array_1 addObject:@"1"];
[array_1 addObject:@"2"];
[array_1 addObject:@"3"];
[array_1 addObject:@"4"];
[array_1 addObject:@"5"];
array_2 = [[NSMutableArray alloc] init];
[array_2 addObject:@"a"];
[array_2 addObject:@"b"];
[array_2 addObject:@"c"];
[array_2 addObject:@"d"];
[array_2 addObject:@"e"];
pickerContainer.frame = CGRectMake(0, 460, 320, 261);
[super viewDidLoad];
}
- (void)viewDidUnload
{
[self setPickerContainer:nil];
[self setTextfield_1:nil];
[self setTextfield_2:nil];
[super viewDidUnload];
}
- (IBAction)showArray_1Picker:(id)sender
{
[textfield_1 resignFirstResponder];
textFieldTouched = 1;
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:0.3];
pickerContainer.frame = CGRectMake(0, 200, 320, 261);
[UIView commitAnimations];
}
- (IBAction)showArray_2Picker:(id)sender
{
[textfield_2 resignFirstResponder];
textFieldTouched = 2;
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:0.3];
pickerContainer.frame = CGRectMake(0, 200, 320, 261);
[UIView commitAnimations];
}
- (IBAction)hidePicker:(id)sender
{
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:0.3];
pickerContainer.frame = CGRectMake(0, 460, 320, 261);
[UIView commitAnimations];
}
@end
所以我遇到了两个主要问题:
如果我设置 textFieldTouched = 0 (或 > 2),就像我在选择器出现时为空之前所做的那样。无论如何,如果我再次隐藏它,它会在文本字段中写入相应数组的第一个值。
如果我设置 textFieldTouched = 1 或 =2,无论我尝试编辑什么文本字段,选择器都会填充相关数组。但是,如果我将选择器上的值滚动到我的视线之外,当我向后滚动时它们会发生变化。
我想要这样:
如果我触摸文本字段 1,选择器会显示填充数组 1
如果我触摸文本字段 2,选择器会显示填充数组 2
等等。
你能帮我吗?
我已经上传了代码,以便您更好地查看它。
https://dl.dropbox.com/u/5858884/ProblemCode.zip
附言
英语不是我的母语,所以请原谅错误;)
我两周前开始编程,所以如果你在我的代码中发现不属于我的问题的错误,请告诉我,这样我会变得更好:)