使用UIPickerview

Question

我在Xcode4.2的选项卡式应用程序中编写了这段代码，它工作得很好，但我希望它是选择器视图中的一个下拉菜单，但我不确定需要添加什么代码，你们能帮我看一下代码吗

.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：

在选择每个选择器视图时，每次使用该数据重新加载表视图时，将该数据添加到一个可变数组

• 中(可变的

• 数据将被添加到表格列表中。

享受编码:)