建立UIDatePicker/UISegmentControl

建立UIDatePicker:<br />//大小固定為320＊216<br /> datePicker1 = [[UIDatePicker alloc] initWithFrame: CGRectMake( 0, 100, 280, 200)];<br /> datePicker1.timeZone = [NSTimeZone defaultTimeZone];<br /> datePicker1.datePickerMode = UIDatePickerModeDate;<br /> [datePicker1 addTarget: self action: @selector(changes) forControlEvents: UIControlEventValueChanged];<br /> [self addSubview: datePicker1];<br /> [datePicker1 release];<br />建立UISegmentControl<br /> NSArray *array = [NSArray arrayWithObjects: @"1", @"2", @"3",@"4", nil];<br /> UISegmentedControl *segmentControl = [[UISegmentedControl alloc] initWithItems: array];<br /> segmentControl.frame = CGRectMake( 0, 20, 320, 35 );<br /> segmentControl.segmentedControlStyle = UISegmentedControlStyleBar;<br /> segmentControl.momentary = YES;//瞬間<br /> [segmentControl addTarget: self action:@selector(changed:) forControlEvents: UIControlEventValueChanged]; 

 

label換行:

label.lineBreakMode = UILineBreakModeCharacterWrap;

label.numberOfLines = 0;

 

修改picker,顯示到label:<br />- (void)changeDateInLabel:(id)sender{<br />//Use NSDateFormatter to write out the date in a friendly format<br />NSDateFormatter *df = [[NSDateFormatter alloc] init];<br />df.dateStyle = NSDateFormatterMediumStyle;<br />label.text = [NSString stringWithFormat:@"%@",<br /> [df stringFromDate:datePicker.date]];<br />[df release];<br />}<br />// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.<br />- (void)viewDidLoad<br />{<br /> [super viewDidLoad];</p><p> label = [[UILabel alloc] init];<br /> label.frame = CGRectMake( 10,10,200,30);<br /> label.textAlignment = UITextAlignmentCenter;</p><p> NSDateFormatter *df = [[NSDateFormatter alloc] init];<br /> df.dateStyle = NSDateFormatterMediumStyle;<br /> label.text = [NSString stringWithFormat: @"%@", [df stringFromDate: [NSDate date]]];<br /> [df release];<br /> [self.view addSubview: label];<br /> [label release];</p><p> datePicker = [[UIDatePicker alloc] initWithFrame:CGRectMake(0, 250, 0, 0)];<br />datePicker.datePickerMode = UIDatePickerModeDate;<br />datePicker.date = [NSDate date];</p><p>[datePicker addTarget:self<br /> action:@selector(changeDateInLabel:)<br /> forControlEvents:UIControlEventValueChanged];<br />[self.view addSubview:datePicker];<br /> [datePicker release];</p><p>}<br />