UIPickerView使用DEMO

@interface Set_starViewController : UIViewController{
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