我有一个屏幕，上面有很多文本字段。对于一个特定的文本字段，我需要它显示一个选择器，用户可以从中选择状态名称，一旦用户通过单击状态名称选择了一个状态，选择器应该消失。
我不太确定如何做到这一点，我制作了一个看起来像这样的 Nib 文件。
这是我的头文件：
#import <UIKit/UIKit.h>
#import "APIHelper.h"
@interface AddNewAddressViewController : UIViewController <UIPickerViewDelegate,
UIPickerViewDataSource, UITextFieldDelegate>
{
APIHelper *myAPIHelper;
NSMutableData *responseData;
NSURLConnection *theConnection;
UIPickerView *picker;
NSArray *stateNames;
@public IBOutlet UIImageView *imageNewAddressBox;
@public IBOutlet UIImageView *imageNewAddressBox1;
@public IBOutlet UIImageView *imageNewAddressBox2;
@public IBOutlet UIImageView *imageNewAddressBox3;
@public IBOutlet UILabel *labelNewAddress;
@public IBOutlet UILabel *labelStreetAddress;
@public IBOutlet UILabel *labelStreetAddressTwo;
@public IBOutlet UILabel *labelZipCode;
@public IBOutlet UILabel *labelState;
@public IBOutlet UILabel *labelCity;
@public IBOutlet UILabel *labelPhoneNumber;
@public IBOutlet UITextField *textFieldFullName;
@public IBOutlet UITextField *textFieldStreetAddress;
@public IBOutlet UITextField *textFieldPhoneNumber;
@public IBOutlet UITextField *textFieldStreetAddressTwo;
@public IBOutlet UITextField *textFieldCity;
@public IBOutlet UITextField *textFieldState;
@public IBOutlet UITextField *textFieldZipCode;
@public IBOutlet UIButton *buttonNext;
}
@property (nonatomic, strong) IBOutlet UIPickerView *picker;
@property (nonatomic, strong) NSArray *stateNames;
@property (nonatomic, strong) IBOutlet UIImageView *imageNewAddressBox;
@property (nonatomic, strong) IBOutlet UIImageView *imageNewAddressBox1;
@property (nonatomic, strong) IBOutlet UIImageView *imageNewAddressBox2;
@property (nonatomic, strong) IBOutlet UIImageView *imageNewAddressBox3;
@property (nonatomic, strong) IBOutlet UILabel *labelNewAddress;
@property (nonatomic, strong) IBOutlet UILabel *labelStreetAddress;
@property (nonatomic, strong) IBOutlet UILabel *labelStreetAddressTwo;
@property (nonatomic, strong) IBOutlet UILabel *labelZipCode;
@property (nonatomic, strong) IBOutlet UILabel *labelState;
@property (nonatomic, strong) IBOutlet UILabel *labelCity;
@property (nonatomic, strong) IBOutlet UILabel *labelPhoneNumber;
@property (nonatomic, strong) IBOutlet UITextField *textFieldFullName;
@property (nonatomic, strong) IBOutlet UITextField *textFieldStreetAddress;
@property (nonatomic, strong) IBOutlet UITextField *textFieldPhoneNumber;
@property (nonatomic, strong) IBOutlet UITextField *textFieldStreetAddressTwo;
@property (nonatomic, strong) IBOutlet UITextField *textFieldCity;
@property (nonatomic, strong) IBOutlet UITextField *textFieldState;
@property (nonatomic, strong) IBOutlet UITextField *textFieldZipCode;
@property (nonatomic, strong) IBOutlet UIButton *buttonNext;
-(IBAction)addressTextFieldShouldReturn:(id)sender;
-(IBAction)nextPressed;
@end
这是我的 .M 文件：
#import "AddNewAddressViewController.h"
@implementation AddNewAddressViewController
@synthesize imageNewAddressBox;
@synthesize imageNewAddressBox1;
@synthesize imageNewAddressBox2;
@synthesize imageNewAddressBox3;
@synthesize labelNewAddress;
@synthesize labelStreetAddress;
@synthesize labelStreetAddressTwo;
@synthesize labelZipCode;
@synthesize labelState;
@synthesize labelCity;
@synthesize labelPhoneNumber;
@synthesize textFieldFullName;
@synthesize textFieldStreetAddress;
@synthesize textFieldPhoneNumber;
@synthesize textFieldStreetAddressTwo;
@synthesize textFieldCity;
@synthesize textFieldState;
@synthesize textFieldZipCode;
@synthesize buttonNext;
@synthesize stateNames;
@synthesize picker;
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
self.stateNames = [[NSArray alloc] initWithObjects:@"Alabama", @"Alaska", @"Arizona", @"Arkansas", @"California", @"Colorado", @"Connecticut", @"Delaware", @"District of Columbia", @"Florida", @"Georgia", @"Guam", @"Hawaii", @"Idaho", @"Illinois", @"Indiana", @"Iowa", @"Kansas", @"Kentucky", @"Louisiana", @"Maine", @"Maryland", @"Massachusetts", @"Michigan", @"Minnesota", @"Mississippi", @"Missouri", @"Montana", @"Nebraska", @"Nevada", @"New Hampshire", @"New Jersey", @"New Mexico", @"New York", @"North Carolina", @"North Dakota", @"Ohio", @"Oklahoma", @"Oregon", @"Pennsylvania", @"Puerto Rico", @"Rhode Island", @"South Carolina", @"South Dakota", @"Tennessee", @"Texas", @"Utah", @"Vermont", @"Virginia", @"Virgin Islands", @"Washington", @"West Virginia", @"Wisconsin", @"Wyoming", nil];
[super viewDidLoad];
// Do any additional setup after loading the view from its nib.
// clicking outside the textfields removes keyboard
UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc]
initWithTarget:self
action:@selector(addressTextFieldShouldReturn:)];
[self.view addGestureRecognizer:tap];
}
- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
[self setTitle: @"Update Address Book"];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (void)viewDidUnload {
[super viewDidUnload];
}
-(IBAction)addressTextFieldShouldReturn:(id)sender
{
[textFieldFullName resignFirstResponder];
[textFieldStreetAddress resignFirstResponder];
[textFieldStreetAddressTwo resignFirstResponder];
[textFieldPhoneNumber resignFirstResponder];
[textFieldState resignFirstResponder];
[textFieldCity resignFirstResponder];
[textFieldZipCode resignFirstResponder];
[sender resignFirstResponder];
}
#pragma mark -
#pragma mark PickerView DataSource
- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView
{
return 1;
}
- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component
{
return [stateNames count];
}
- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent: (NSInteger)component
{
return [stateNames objectAtIndex:row];
}
@end
所以，我想要做的就是，当用户单击 textFieldState 时，会从底部弹出一个包含所有状态名称的选择器，然后用户单击状态名称，该名称将出现在 textFieldState 中。
任何帮助将不胜感激。谢谢。