मुझे वास्तव में समझ में नहीं आ UIPickerViewरहा है कि ए अंदर क्यों जा रहा है UIActionSheet। यह एक गड़बड़ और हैक करने वाला समाधान प्रतीत होता है, जिसे भविष्य के iOS रिलीज़ में तोड़ा जा सकता है। (मैंने पहले एक ऐप में इस तरह की चीजों को तोड़ दिया है, जहां UIPickerViewपहले टैप पर प्रस्तुत नहीं किया जा रहा था और इसे वापस लेना पड़ा - अजीब झगड़े के साथ UIActionSheet)।
मैंने जो कुछ किया था, उस पर अमल किया UIPickerViewऔर फिर इसे अपने विचार के लिए एक उप-धारा के रूप में जोड़ा, और इसे आगे बढ़ाते हुए मानो इसे एक एक्शन शीट की तरह प्रस्तुत किया जा रहा था।
/// Add the PickerView as a private variable
@interface EMYourClassName ()
@property (nonatomic, strong) UIPickerView *picker;
@property (nonatomic, strong) UIButton *backgroundTapButton;
@end
///
/// This is your action which will present the picker view
///
- (IBAction)showPickerView:(id)sender {
// Uses the default UIPickerView frame.
self.picker = [[UIPickerView alloc] initWithFrame:CGRectZero];
// Place the Pickerview off the bottom of the screen, in the middle set the datasource delegate and indicator
_picker.center = CGPointMake([[UIScreen mainScreen] bounds].size.width / 2.0, [[UIScreen mainScreen] bounds].size.height + _picker.frame.size.height);
_picker.dataSource = self;
_picker.delegate = self;
_picker.showsSelectionIndicator = YES;
// Create the toolbar and place it at -44, so it rests "above" the pickerview.
// Borrowed from @Spark, thanks!
UIToolbar *pickerDateToolbar = [[UIToolbar alloc] initWithFrame:CGRectMake(0, -44, 320, 44)];
pickerDateToolbar.barStyle = UIBarStyleBlackTranslucent;
[pickerDateToolbar sizeToFit];
NSMutableArray *barItems = [[NSMutableArray alloc] init];
UIBarButtonItem *flexSpace = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemFlexibleSpace target:self action:nil];
[barItems addObject:flexSpace];
// The action can whatever you want, but it should dimiss the picker.
UIBarButtonItem *doneBtn = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone target:self action:@selector(backgroundTapped:)];
[barItems addObject:doneBtn];
[pickerDateToolbar setItems:barItems animated:YES];
[_picker addSubview:pickerDateToolbar];
// If you have a UITabBarController, you should add the picker as a subview of it
// so it appears to go over the tabbar, not under it. Otherwise you can add it to
// self.view
[self.tabBarController.view addSubview:_picker];
// Animate it moving up
[UIView animateWithDuration:.3 animations:^{
[_picker setCenter:CGPointMake(160, [[UIScreen mainScreen] bounds].size.height - 148)]; //148 seems to put it in place just right.
} completion:^(BOOL finished) {
// When done, place an invisible button on the view behind the picker, so if the
// user "taps to dismiss" the picker, it will go away. Good user experience!
self.backgroundTapButton = [UIButton buttonWithType:UIButtonTypeCustom];
_backgroundTapButton.frame = CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height);
[_backgroundTapButton addTarget:self action:@selector(backgroundTapped:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:_backgroundTapButton];
}];
}
// And lastly, the method to hide the picker. You should handle the picker changing
// in a method with UIControlEventValueChanged on the pickerview.
- (void)backgroundTapped:(id)sender {
[UIView animateWithDuration:.3 animations:^{
_picker.center = CGPointMake(160, [[UIScreen mainScreen] bounds].size.height + _picker.frame.size.height);
} completion:^(BOOL finished) {
[_picker removeFromSuperview];
self.picker = nil;
[self.backgroundTapButton removeFromSuperview];
self.backgroundTapButton = nil;
}];
}
