UIPickerView 使用

//初始化 pickerView
-(void)initPickerView{
pickerArray = [NSArray arrayWithObjects:@"顺丰",@"申通",@"韵达",@"圆通",@"天天",@"全峰",@"中通",@"百世汇通", nil];
logisticsPicker = [[UIPickerView alloc] initWithFrame:CGRectMake(0, 568, 320, 180)];
logisticsPicker.delegate = self;　//绑定事件
logisticsPicker.dataSource = self; //绑定数据元
[logisticsPicker setBackgroundColor:[UIColor whiteColor]];
[self.view addSubview:logisticsPicker];
[self.view bringSubviewToFront:logisticsPicker];//将视图放置最前面
}
//每行显示的个数
-(NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView{
return 1;
}
//显示多少行
-(NSInteger) pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component{
return [pickerArray count];
}
//每行显示的标题名称
-(NSString*) pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component{
return [pickerArray objectAtIndex:row];
}

//点击空白隐藏键盘
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{
[self.view endEditing:YES];
[self inView];
}
//设置隐藏动画
- (void)popView {
CGContextRef context = UIGraphicsGetCurrentContext();
[UIView beginAnimations:nil context:context];
[UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
[UIView setAnimationDuration:0.6];//动画时间长度，单位秒，浮点数
[self.view exchangeSubviewAtIndex:0 withSubviewAtIndex:1];
self.logisticsPicker.frame = CGRectMake(0, 400, 320, 180);

[UIView setAnimationDelegate:self];
// 动画完毕后调用animationFinished
//    [UIView setAnimationDidStopSelector:@selector(animationFinished)];
[UIView commitAnimations];
}
//设置弹出动画
- (void)inView {
CGContextRef context = UIGraphicsGetCurrentContext();
[UIView beginAnimations:nil context:context];
[UIView setAnimationCurve:UIViewAnimationCurveEaseInOut];
[UIView setAnimationDuration:0.6];//动画时间长度，单位秒，浮点数
self.logisticsPicker.frame = CGRectMake(0, 568, 320, 180);

[UIView setAnimationDelegate:self];
// 动画完毕后调用animationFinished
//    [UIView setAnimationDidStopSelector:@selector(animationFinished)];
[UIView commitAnimations];
}
-(void)animationFinished{
NSLog(@"动画结束!");
}
//绑定 页面点击事件
-(IBAction)logisticsPickerBtn:(id)sender{
if(lpEntity){
[self.view endEditing:YES];
[self popView];
}else{
chvc = [[CalendarHomeViewController alloc]init];
chvc.calendartitle = @"出行日期";
[chvc setAirPlaneToDay:365 ToDateforString:nil];//飞机初始化方法
chvc.calendarblock = ^(CalendarDayModel *model){
logisticsName.text = [model toString];
};
[self.navigationController pushViewController:chvc animated:YES];
}
}
//当你选中 pickerview 的某行时会调用该函数。
- (void)pickerView:(UIPickerView *)thePickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component {
NSLog(@"You select row %ld",(long)row);
logisticsName.text = [pickerArray objectAtIndex:row];
}