これが私のアプリやゲームのいくつかで私がやった方法です。
#import <UIKit/UIKit.h>
#pragma mark - Delegate Protocol
@protocol someDelegate
@required
-(void)somePickerFinishedPicking:(id)item;
@end
#pragma mark - Class interface
@interface SomePicker : UIViewController <UIPickerViewDelegate, UIPickerViewDataSource>
{
NSMutableArray* dataSource;
}
#pragma mark - Property Istantiation
@property (nonatomic, retain) NSMutableArray* dataSource;
@property (nonatomic, retain) id <someDelegate> pickDelegate;
#pragma mark - Constructors / Destructors
- (id) initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil;
- (void) didReceiveMemoryWarning;
- (void) dealloc;
- (void) createDataSource;
#pragma mark - View Lifecycle
- (void) viewDidLoad;
#pragma mark - UIPicker Protocols
-(NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component;
-(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView;
-(void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component;
-(UIView*) pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view;
#pragma mark - Delegate Protocols
-(void) handlePickerDidFinish:(id)item;
@end
あなたの.mのためにこれ
#pragma mark - Class Implementation
@implementation SomePicker
#pragma mark - Variable synthesize
// ARRAYS
@synthesize dataSource;
// DELEGATES
@synthesize pickDelegate = _pickDelegate;
#pragma mark - Constructors / Deconstructors
// Class initialization
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil;
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
dataSource = [[NSMutableArray alloc] init];
[self createDataSource];
}
return self;
}
// Handles memory warning events
- (void)didReceiveMemoryWarning
{
// Release the view if it doesn't have a superview.
[super didReceiveMemoryWarning];
// Release any cached data, images, etc that aren't in use.
}
// Garbage Collection
- (void) dealloc;
{
// Release what you need
self.dataSource = nil;
[super dealloc];
}
// Creates the occasion entries for the picker
-(void)createDataSource
{
NSMutableDictionary* dataDictionary = [[NSMutableDictionary alloc] init];
// create your data source here or just forget about this and pass it from the parentViewController.
[dataDictionary release];
}
#pragma mark - View lifecycle
// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad;
{
[super viewDidLoad];
UIPickerView* occasionsPicker = [[UIPickerView alloc] init];
[occasionsPicker setDataSource:self];
[occasionsPicker setDelegate:self];
[occasionsPicker setTag:888];
[occasionsPicker selectRow:500 inComponent:0 animated:YES];
[self.view addSubview:occasionsPicker];
[occasionsPicker release];
[self handlePickerDidFinish:[[self.dataSource objectAtIndex:(500 % self.dataSource.count)] objectForKey:@"key"]];
}
#pragma mark - UIPicker Protocols
// Creates the rows in the picker.
-(NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component
{
// Endless roll illusion else just bind it to the size of the data source
return 1000;
}
// Determines the number of columns in the picker
-(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView
{
// Add however many columns you need
return 1;
}
// Handles the event when the user picks a row.
-(void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component
{
//this does something with the row selected
[self handlePickerDidFinish:[[self.dataSource objectAtIndex:(row % self.dataSource.count)] objectForKey:@"key"]];
}
// Creates the custom view for each cell so the text shows in accordance to the App Style
-(UIView*) pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view
{
UILabel* customRowLabel = [[[UILabel alloc] initWithFrame:CGRectMake(0, 0, [pickerView rowSizeForComponent:component].width, [pickerView rowSizeForComponent:component].height)] autorelease];
customRowLabel.font = [UIFont fontWithName:@"HelveticaNeue" size: 16];
customRowLabel.textColor = [UIColor colorWithRed:kColorRed green:kColorGreen blue:kColorBlue alpha:1];
customRowLabel.textAlignment = UITextAlignmentCenter;
customRowLabel.backgroundColor = [UIColor clearColor];
customRowLabel.text = [[self.dataSource objectAtIndex:(row % self.dataSource.count)] objectForKey:@"key"];
return customRowLabel;
}
#pragma mark - Delegate Protocols
// Notifies Delegate class that an action has been perfomed and passes the Mood String selected
-(void)handlePickerDidFinish:(id)item
{
[self.pickDelegate somePickerFinishedPicking:item];
}
@end
そして、親のViewControllerでそのようにインスタンス化します。
CGRect rectPicker = CGRectMake(60, 100, 200, 216);
self.somePicker = [[[SomePicker alloc] init] autorelease];
[self.somePicker setPickDelegate:self];
[self.somePicker.view setBackgroundColor:[UIColor clearColor]];
self.somePicker.view.frame = rectPicker;
[self.somePicker.view setTag:777];
[self.somePicker.view setAlpha:0];
[self.view addSubview:self.somePicker.view];
〜/行末
