iPhone应用开发之UIPickerView使用DEMO

iPhone应用开发之UIPickerView使用DEMO是本文要介绍的内容，内容不多，本文基于代码实现的内容，主要编写选择器的实现。从生肖选择、学历选择等来实现UIPickerView的用法，来看详细内容。

@interface Set_starViewController : UIViewController<UIPickerViewDelegate>{  
UIPickerView  *pickerview;  
UILabel       *contentview;  
NSArray       *content;//星座  
id      _delegate;  
int     _type;  
}  
-(id)initWithDelegate:(id)delegate type:(int)type;  
- (void)setString:(id)sender;  
@end  
//  Set_starViewController.m  
//  
//  Created by AmorYin on 10-11-23.  
//  Copyright 2010 __MyCompanyName__. All rights reserved.  
//  
#import "Set_starViewController.h"  
@implementation Set_starViewController  
-(id)initWithDelegate:(id)delegate type:(int)type  
{  
self = [super init];  
if (self != nil){  
UILabel *titleText = [[UILabel alloc] initWithFrame: CGRectMake(0, 0, 200, 20)];  
titleText.backgroundColor = [UIColor clearColor];  
titleText.textAlignment = UITextAlignmentCenter;  
titleText.textColor = [UIColor colorWithRed:0.33 green:0.33 blue:0.33 alpha:1.0];  
[titleText setFont:[UIFont systemFontOfSize:15.0]];  
[titleText setText:@"星座"];  
self.navigationItem.titleView=titleText;  
[titleText release];  
_delegate = delegate;  
UIButton *back = [[UIButton alloc] initWithFrame:CGRectMake(0.0, 0.0, 62.0, 32.0)];  
[back setBackgroundImage:[UIImage imageNamed:@"返回按钮.png"] forState:UIControlStateNormal];  
[back setBackgroundImage:[UIImage imageNamed:@"返回按钮按下.png"] forState:UIControlStateHighlighted];  
[back setBackgroundImage:[UIImage imageNamed:@"返回按钮.png"] forState:UIControlStateDisabled];  
[back addTarget:_delegate  
action:@selector(backView)  
  forControlEvents:UIControlEventTouchUpInside];  
UIBarButtonItem *add = [[UIBarButtonItem alloc] initWithCustomView:back];  
[[self navigationItem] setLeftBarButtonItem:add];  
[add release];  
[back release];  
UIBarButtonItem *save = nil;  
save = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemSave  
target:self   
action:@selector(setString:)];  
self.navigationItem.rightBarButtonItem = save;  
save = nil;  
[save release];  
if (type == 0) {  
content = [[NSArray alloc] initWithObjects:@"水瓶座",@"双鱼座",@"白羊座",@"金牛座"  
  ,@"双子座",@"巨蟹座",@"狮子座",@"处女座"  
  ,@"天秤座",@"天蝎座",@"射手座",@"山羊座",nil];  
_type = 0;  
}else {  
content = [[NSArray alloc] initWithObjects:@"初中",@"高中",@"中技",@"中专",@"大专",@"本科",@"MBA",@"硕士"  
 
  ,@"其他",nil];  
_type = 1;  
}  
}  
return self;  
}  
 
-(void) loadView  
{  
UIView  *myview = [[[UIView alloc] initWithFrame:[UIScreen mainScreen].applicationFrame] autorelease];  
myview.autoresizesSubviews = YES;  
[myview setBackgroundColor:[UIColor colorWithPatternImage:[UIImage imageNamed:@"background.png"]]];  
self.view  = myview;  
// 设置选择器  
pickerview = [[UIPickerView alloc] initWithFrame:CGRectMake(0.0, 150.0, 320.0, 216.0)];  
pickerview.delegate = self;  
pickerview.showsSelectionIndicator = YES;  
[self.view addSubview:pickerview];  
contentview = [[UILabel alloc] initWithFrame:CGRectMake(80.0, 80.0, 100.0, 40.0)];  
contentview.backgroundColor = [UIColor clearColor];  
[self.view addSubview: contentview];  
 
}  
 
- (void)didReceiveMemoryWarning {  
    // Releases the view if it doesn't have a superview.  
    [super didReceiveMemoryWarning];  
    // Release any cached data, images, etc that aren't in use.  
}  
- (void)viewDidUnload {  
    [super viewDidUnload];  
    // Release any retained subviews of the main view.  
    // e.g. self.myOutlet = nil;  
}  
- (void)dealloc {  
    [super dealloc];  
[contentview release];  
[pickerview release];  
[content release];  
}  
 
#pragma mark -  
#pragma mark 处理方法  
// 返回显示的列数  
- (NSInteger)numberOfComponentsInPickerView:(UIPickerView*)pickerView  
{  
return 1;  
}  
// 返回当前列显示的行数  
 
- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component  
{  
return [content count];  
}  
// 设置当前行的内容，若果行没有显示则自动释放  
- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component  
{  
return [content objectAtIndex:row];  
}  
- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component  
{  
//NSString *result = [pickerView pickerView:pickerView titleForRow:row forComponent:component];  
NSString  *result = nil;  
result = [content objectAtIndex:row];  
NSLog(@"result: %@",result);  
contentview.text = result;  
[result release];  
}  
 
- (void)setString:(id)sender  
{  
// 传递值  
if (_type ==0) {  
[_delegate setSomthing:contentview.text name:@"star"];  
}else {  
[_delegate setSomthing:contentview.text name:@"xueli"];  
}  
[self.navigationController popViewControllerAnimated:YES];  
[self.navigationController pushViewController:_delegate animated:YES];  
[self.navigationController setNavigationBarHidden:NO];  
}  
@end 

小结：iPhone应用开发之UIPickerView使用DEMO的内容介绍完了，希望通过本文的学习对你有所帮助！