大佬教程收集整理的这篇文章主要介绍了iphone – 如何在按下按钮后显示UIPickerView动画？，大佬教程大佬觉得挺不错的，现在分享给大家，也给大家做个参考。
我已经在网站和网络上进行过研究,但我似乎无法正确地进行研究.
这是我的代码：
#pragma mark - Picker View - (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView { return 1; } - (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component { return 4; } - (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component { timersArray = [[NSMutableArray alloc] init]; [timersArray addObject:@"No timer"]; [timersArray addObject:@"15 seconds"]; [timersArray addObject:@"30 seconds"]; [timersArray addObject:@"60 seconds"]; return [timersArray objectATindex:row]; } - (void)pickerView:(UIPickerView *)pickerView didSELEctRow:(NSInteger)row inComponent:(NSInteger)component { if ([[timersArray objectATindex:row] isEqual:@"No timer"]) { timerInDication.text = @"No timer SELEcted"; timersPickerView.hidden = YES; // Animation code to dismiss picker should go here } else if ([[timersArray objectATindex:row] isEqual:@"15 seconds"]) { timerInDication.text = @"15 seconds SELEcted"; timersPickerView.hidden = YES; // Animation code to dismiss picker should go here } else if ([[timersArray objectATindex:row] isEqual:@"30 seconds"]) { timerInDication.text = @"30 seconds SELEcted"; timersPickerView.hidden = YES; // Animation code to dismiss picker should go here } else if ([[timersArray objectATindex:row] isEqual:@"60 seconds"]) { timerInDication.text = @"60 seconds SELEcted"; timersPickerView.hidden = YES; // Animation code to dismiss picker should go here } } #pragma mark - Delay method // This is where Send button should be enabled - (IBACtion)SELEctTimer { timersPickerView.hidden = NO; // Animation code to present picker view should go here }
-(IBACtion)button:(id)sender { [UIView beginAnimations:nil context:nil]; [UIView setAnimationDuration:0.6]; CGAffineTransform transfrom = CGAffineTransformMakeTranslation(0,200); PickerView.transform = transfrom; PickerView.alpha = PickerView.alpha * (-1) + 1; [UIView commitAnimations]; }
PickerView.alpha = 0; [self.view addSubview:PickerView];
它的作用是让选择器视图在第一次点击时从屏幕顶部掉落并使选择器视图消失,您只需再次单击该按钮.从下一次单击时,选择器视图就会出现并消失.希望它帮助和工作:)
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