[iOS] 关闭动画无效果的原因

[boboxiaodd]

Picker.hide() 方法提前执行了hidden，导致动画无效， onPickerCancel 提前执行了 hidden ，也会导致动画无效并且闪烁

https://github.com/beefe/react-native-picker/blob/6fa89e921c93279e8c0ef6dc871bd13aeddad158/ios/RCTBEEPickerManager/RCTBEEPickerManager.m#L123

改动如下：

RCT_EXPORT_METHOD(hide){

    if (self.pick) {
        dispatch_async(dispatch_get_main_queue(), ^{
            [UIView animateWithDuration:.3 animations:^{
                [self.pick setFrame:CGRectMake(0, SCREEN_HEIGHT, SCREEN_WIDTH, self.height)];
            } completion:^(BOOL finished) {
                [self.pick removeFromSuperview];
                self.pick = nil;
            }];
        });
    }

//    self.pick.hidden=YES;

    return;
}

建议注释掉下面的2块代码，让点击取消，确定，和hide一样的效果 https://github.com/beefe/react-native-picker/blob/6fa89e921c93279e8c0ef6dc871bd13aeddad158/ios/RCTBEEPickerManager/BzwPicker.m#L603

    /*
    dispatch_async(dispatch_get_main_queue(), ^{
        [UIView animateWithDuration:.2f animations:^{

            [self setFrame:CGRectMake(0, SCREEN_HEIGHT, SCREEN_WIDTH, 250)];

        }];
    });

    self.pick.hidden=YES;
   */

https://github.com/beefe/react-native-picker/blob/6fa89e921c93279e8c0ef6dc871bd13aeddad158/ios/RCTBEEPickerManager/BzwPicker.m#L643

 /*
  dispatch_async(dispatch_get_main_queue(), ^{
        [UIView animateWithDuration:.2f animations:^{

            [self setFrame:CGRectMake(0, SCREEN_HEIGHT, SCREEN_WIDTH, 250)];
        }];
    });
*/

RCT_EXPORT_METHOD(_init:(NSDictionary *)indic){
    // ...
     _pick.bolock=^(NSDictionary *backinfoArry){
            dispatch_async(dispatch_get_main_queue(), ^{
                if(![[backinfoArry valueForKey:@"type"] isEqualToString:@"select"]){
                    [weakSelf hide]; //调用hide方法实现一样的动画效果
                }
                [weakSelf sendEventWithName:@"pickerEvent" body:backinfoArry];
            });
        };