PickerView 的使用方法

//

//  ViewController.m

//  testPickerView

//

//  Created by yuyezhulan on 14/11/9.

//  Copyright (c) 2014年 yuyezhulan. All rights reserved.

//

#import "ViewController.h"

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad {

    [super viewDidLoad];

    // Do any additional setup after loading the view, typically from a nib.

    pickerView = [[UIPickerView alloc] initWithFrame:CGRectMake(0, 0, 320, 216)];

    //    指定Delegate

    pickerView.delegate=self;

    //    显示选中框

    pickerView.showsSelectionIndicator=YES;

    [self.view addSubview:pickerView];

    

    NSArray *dataArray = [[NSArray alloc]initWithObjects:@"许嵩",@"周杰伦",@"梁静茹",@"许飞",@"凤凰传奇",@"阿杜",@"方大同",@"林俊杰",@"胡夏",@"邱永传", nil];

    

    pickerData=dataArray;

    

//    //     添加按钮

//    CGRect frame = CGRectMake(120, 250, 80, 40);

//    UIButton *selectButton = [UIButton buttonWithType:UIButtonTypeRoundedRect];

//    selectButton.frame=frame;

//    [selectButton setTitle:@"SELECT" forState:UIControlStateNormal];

//    

//    [selectButton addTarget:self action:@selector(buttonPressed:) forControlEvents:UIControlEventTouchUpInside];

//    

//    [self.view addSubview:selectButton];

    

}

-(void)buttonPressed:(id)sender{

    NSLog(@"Button Pressed!");

}

//返回显示的列数

-(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView

{

    return 5;

}

//返回当前列显示的行数

-(NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component

{

    return [pickerData count];

}

#pragma mark Picker Delegate Methods

//返回当前行的内容,此处是将数组中数值添加到滚动的那个显示栏上

-(NSString*)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component

{

    return [pickerData objectAtIndex:row];

}

- (void)didReceiveMemoryWarning {

    [super didReceiveMemoryWarning];

    // Dispose of any resources that can be recreated.

}

@end