使用 UIPickerview

Question

我在 Xcode 4.2 的选项卡式应用程序中编写了这段代码，它工作得很好，但我希望它是一个选择器视图中的下拉菜单，但我不确定我需要添加什么代码你们可以帮忙这是我的代码吗

.h
#import <UIKit/UIKit.h>

@interface FirstViewController : UIViewController {

    IBOutlet UIPickerView *pickerView;
    NSMutableArray *list;
    IBOutlet UILabel *picklabel;
}

@end


.m

#import "FirstViewController.h"

@implementation FirstViewController

-(NSInteger)numberOfComponentsInPickerview:(UIPickerView *)thePickerView {
    return 1;
}



-(NSInteger)pickerView:(UIPickerView *)thePickerView numberOfRowsInComponent:(NSInteger)component {
    return [list count];
}


-(NSString *)pickerView:(UIPickerView *)thePickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component { return [list objectAtIndex:row];

}

-(void)pickerView:(UIPickerView *)thePickerView titleForRow:(NSInteger)row inComponent:(NSInteger)component {

    NSString *string = [NSString stringWithFormat:@"you selected: %@" , [list objectAtIndex:row]];
    picklabel.text = string;

}


- (void)viewDidUnload
{
    [super viewDidUnload];

    list = [[NSMutableArray alloc] init];
    [list addObject:@"Giraffe"];
    [list addObject:@"Water Bottle"];
    [list addObject:@"spinning Fan"];
    [list addObject:@"Hariy Monkey"];

    // Release any retained subviews of the main view.
    // e.g. self.myOutlet = nil;
}

Answer 1

请按照以下步骤操作：

• 选择每个选取器视图时，将该数据添加到一个可变数组
• 每次使用该数据（可变数组）重新加载表视图时，
• 选定的数据将添加到您的表格列表中。

享受编码的乐趣:)