UIPickerView发布后返回第0行

-1

我向UITableViewCell添加了UIPickerView。我添加了大约5个条目。现在，当我尝试选择一个值时，使用正确的行调用- (void)pickerView:(UIPickerView *)thePickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component函数。但是在屏幕上，UIPickerView“滚动”回第一个元素，并且不会粘到选定的值上。UIPickerView发布后返回第0行

任何人都有同样的问题？

EventSelectCell.h

@class EventSelectCell; 

@protocol EventSelectCellDelegate <NSObject> 

    - (void)selectedEvent:(Event*)selectedEvent; 

@end 

@interface EventSelectCell : UITableViewCell <UIPickerViewDataSource, UIPickerViewDelegate> 

    @property (strong, nonatomic) id <EventSelectCellDelegate> delegate; 

    @property (weak, nonatomic) IBOutlet UIPickerView *selectWheel; 

@end

EventSelectCell.m

#import "EventSelectCell.h" 

@implementation EventSelectCell 
{ 
    EventManager* eventManager; 
    NSArray* listOfEvents; 
} 

- (void)awakeFromNib { 
    self.selectWheel.delegate = self; 
    self.selectWheel.dataSource = self; 

    // get the EventManger 
    eventManager = [EventManager sharedEventManager]; 

    listOfEvents = [eventManager getListOfEvents]; 

    [self.selectWheel reloadAllComponents]; 
} 

- (void)setSelected:(BOOL)selected animated:(BOOL)animated { 
    [super setSelected:selected animated:animated]; 

    // Configure the view for the selected state 
} 

- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)thePickerView { 

    return 1; 
} 

- (NSInteger)pickerView:(UIPickerView *)thePickerView numberOfRowsInComponent:(NSInteger)component { 

    return [listOfEvents count]; 
} 

- (NSString *)pickerView:(UIPickerView *)thePickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component { 
    Event* selectedEvent = [listOfEvents objectAtIndex:row]; 

    return [selectedEvent name]; 
} 

- (void)pickerView:(UIPickerView *)thePickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component { 
    Event* selectedEvent = [listOfEvents objectAtIndex:row]; 

    [self.delegate selectedEvent:selectedEvent]; 
} 

@end

委托

- (void)selectedEvent:(Event*)selectedEvent { 
    [playersInGame removeAllObjects]; 

    [playersInGame addObjectsFromArray:[self.eventManager getPlayersInEvent:selectedEvent onlyActive:YES]]; 

    [selectedEvent setIsActive:[NSNumber numberWithInt:1]]; 

    activeEvent = selectedEvent; 

    [self.tableView reloadData]; 
}

来源

2015-11-01 Pascal

如果可能从didSelectRow发布了一些代码也许您正在重新加载pickerview数据或重绘pickerview – Yan

由于@matt指出可能会在委托方法中发生某些情况。我认为一切都很好。 – Yan

-1

好吧，我发现这个问题。 UIPickerView位于UITableViewCell中。每当有人用我称为[self.tableView reloadData]的UIPickerView选择了一些内容时，这会导致该表重新加载，并且还会重新初始化UIPickerView。

现在我只是重新加载表中的singel部分。

来源

2015-11-01 19:53:34 Pascal

UIPickerView发布后返回第0行

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