IOS拾取器piker单组件实例

作者：朱克锋

邮箱：zhukefeng@iboxpay.com

转载请注明出处：http://blog.youkuaiyun.com/linux_zkf

piker在IOS开发中有着广泛的应用，这里实现的是单组件的piker，实现piker需要遵从piker的数据源与代理协议

UIPickerViewDelegate, UIPickerViewDataSource

示例效果如图

头文件

#import <UIKit/UIKit.h>

@interface SingleComponentPickerViewController : UIViewController

<UIPickerViewDelegate, UIPickerViewDataSource> {

UIPickerView    *singlePicker;

NSArray         *pickerData;

}

@property (nonatomic, retain) IBOutlet UIPickerView *singlePicker;

@property (nonatomic, retain) NSArray *pickerData;

- (IBAction)buttonPressed;

@end

实现文件

#import "SingleComponentPickerViewController.h"

@implementation SingleComponentPickerViewController

@synthesize singlePicker;

@synthesize pickerData;

- (IBAction)buttonPressed {

    NSInteger row = [singlePicker selectedRowInComponent:0];

    NSString *selected = [pickerData objectAtIndex:row];

//other test ...

}

- (void)viewDidLoad {

    NSArray *array = [[NSArray alloc] initWithObjects:@"A", @"B",

  @"C", @"D", @"E", @"F", @"G", nil];

    self.pickerData = array;

    [array release];

}

#pragma mark -

#pragma mark Picker Data Source Methods

- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView {

    return 1;

}

- (NSInteger)pickerView:(UIPickerView *)pickerView

numberOfRowsInComponent:(NSInteger)component {

    return [pickerData count];

}

#pragma mark Picker Delegate Methods

- (NSString *)pickerView:(UIPickerView *)pickerView

titleForRow:(NSInteger)row

forComponent:(NSInteger)component {

    return [pickerData objectAtIndex:row];

}