iphone - UIDatePicker 有关显示的问题

Question

有谁知道在将 UIDatePicker 添加到 UIView 后是否可以更改它的分钟间隔？是否可以显示和隐藏 2 个不同的日期选择器？单击按钮时，我想将 UIDatePicker 的 minuteInterval 更改为 5 和 30。任何示例代码将不胜感激。

Answer 1

是的，您所问的一切都是可能的……方法如下：

#import "DateStuffAppDelegate.h"

@implementation DateStuffAppDelegate

@synthesize window;


- (void)applicationDidFinishLaunching:(UIApplication *)application {
    d = [[[UIDatePicker alloc] init] retain];
    d.frame = CGRectMake(0, 0, d.frame.size.width, d.frame.size.height);

    d.datePickerMode = UIDatePickerModeTime;
    d.countDownDuration = 10.0;
    d.minuteInterval = 1;

    [window addSubview: d];


    d1 = [[[UIDatePicker alloc] init] retain];
    d1.frame = CGRectMake(0, d.frame.size.height, d1.frame.size.width, d1.frame.size.height);

    d1.datePickerMode = UIDatePickerModeTime;
    d1.countDownDuration = 10.0;
    d1.minuteInterval = 1;

    [window addSubview: d1];

    [window makeKeyAndVisible];
}



- (IBAction)doStuff
{
    d.minuteInterval = 5;

    d1.hidden = !d1.hidden;
}


- (void)dealloc {
    [window release];
    [super dealloc];
}


@end