ios - 警告 : Attempt to present * whose view is not in the window hierarchy

Question

首先要感谢大家! :)

因此，我有一个带有 TableView 的主视图 Controller ，以及来自另一个类的自定义单元格。我已经对单元格进行了自定义选择(您必须滑动 View 的单元格)。在该操作中，我调用主视图 Controller 中的方法来发送 SMS。但是我收到了这个警告，并且 SMS Controller 没有出现。我知道，这条错误消息意味着它无法打开 SMS Controller ，因为未加载主 Controller ？我从这里尝试了一些代码，但对我没有任何作用。我的类(class)目前看起来像这样:

Main controller.m

.
.
.

-(void)viewWillAppear:(BOOL)animated
{
    [self.citiesButton setTitle:rowValue forState:UIControlStateNormal];

    UITableView *tableView = (id)[self.view viewWithTag:1];
{
    tableView.rowHeight = 100;
    UINib *nib  = [UINib nibWithNibName:@"TableViewCell" bundle:nil];
    [tableView registerNib:nib forCellReuseIdentifier:CellTableIdentifier];

    UIEdgeInsets contentInset = tableView.contentInset;
    contentInset.top = 20;
    [tableView setContentInset:contentInset];

    NSLog(@"rowValue is %@", rowValue);
    self.city = [_dict objectForKey:rowValue];
}

    NSLog(@"View will appear");
    [tableView reloadData];
}

-(void)sendSMS
{
    MFMessageComposeViewController *controller = [[MFMessageComposeViewController alloc] init];
    if([MFMessageComposeViewController canSendText])

    {
        controller.body = @"Testy Test";
        controller.recipients = [NSArray arrayWithObjects:@"774252704", nil];
        controller.messageComposeDelegate = self;

        [self dismissViewControllerAnimated:YES completion:^{
        [self presentViewController:controller animated:YES completion:nil];
    }];

}
}

所以我试图先关闭主 Controller ，然后再显示 smsController，但仍然没有成功。我认为，问题在于我从 TableViewCell 类调用该方法，但仍然在加载 View 后创建表，所以我真的迷路了。

非常感谢您的宝贵时间!

=====编辑=====

这是自定义单元格类，我从中调用 sendSMS 方法

tableViewCell.m

#import "TableViewCell.h"
#import "TableViewController.h"

static NSString *CellTableIdentifier = @"TableViewCell";

@implementation TableViewCell

@synthesize timeLabel = _timeLabel;
@synthesize priceLabel = _priceLabel;
@synthesize infoLabel = _infoLabel;


- (void)awakeFromNib
{
    // Initialization code
}


-(void)layoutSubviews
{
    UIPanGestureRecognizer *panGesture = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(panGestureRecognizer:)];

    [self addGestureRecognizer:panGesture];
}


-(id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier {

    self = [super initWithStyle:style reuseIdentifier:CellTableIdentifier];



    return self;
}

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

    // Configure the view for the selected state
}

-(void)panGestureRecognizer:(UIPanGestureRecognizer *)sender{
    CGPoint translation = [sender translationInView:self];

    TableViewController *mainController = [[TableViewController alloc] init];

    //NSLog(@"Panned with translation point: %@", NSStringFromCGPoint(translation));

    sender.view.center = CGPointMake(sender.view.center.x + translation.x,
                                 sender.view.center.y);


    CGPoint breakingPoint = CGPointMake(320,sender.view.center.y);
    CGPoint startPoint = CGPointMake(150, sender.view.center.y);
    CGPoint endPoint = CGPointMake(500, sender.view.center.y);

    if (sender.view.center.x <= startPoint.x) {
        sender.view.center = startPoint;
    }

    if (sender.state == UIGestureRecognizerStateEnded) {
        if (sender.view.center.x >= breakingPoint.x) {

            [UIView animateWithDuration:0.2
                              delay:0.0
                            options: UIViewAnimationOptionCurveEaseOut
                         animations:^{
                             sender.view.center = endPoint;
                         }
                         completion:^(BOOL finished){
                             NSLog(@"Bought!");
                             [mainController sendSMS];
                         }];

    } else {
        //recognizer.view.center = startPoint;

        [UIView animateWithDuration:0.2
                              delay:0.0
                            options: UIViewAnimationOptionCurveEaseOut
                         animations:^{
                             sender.view.center = startPoint;
                         }
                         completion:^(BOOL finished){
                             NSLog(@"Returned!");
                         }];
    }
}
    [sender setTranslation: CGPointZero inView: self];
}

Answer 1

- (void)presentViewController:(UIViewController *)viewController animated:(BOOL)animated onComplete:(void (^)(void))callback
{
    AppDelegate *APP_DELEGATE = [UIApplication sharedApplication].delegate;

    UIViewController *presentedModalVC = [APP_DELEGATE.window.rootViewController presentedViewController];

    if (presentedModalVC) {
        while (presentedModalVC.presentedViewController) {
            presentedModalVC = presentedModalVC.presentedViewController;
        }
        [presentedModalVC presentViewController:viewController animated:animated completion:callback];
    } else {
        [APP_DELEGATE.window.rootViewController presentViewController:viewController animated:animated completion:callback];
    }
}

-(void)sendSMS
{
    MFMessageComposeViewController *controller = [[MFMessageComposeViewController alloc] init];
    if([MFMessageComposeViewController canSendText])

    {
        controller.body = @"Testy Test";
        controller.recipients = [NSArray arrayWithObjects:@"774252704", nil];
        controller.messageComposeDelegate = self;

        [self presentViewController:controller animated:YES onComplete:nil];
    }              
}

您必须在当前呈现的 vc 上呈现您的 vc，如果存在的话，即如果您具有呈现的 vc 的这种层次结构

VC1---    VC2 - presented by VC1-----      VC3 - presented by VS2----  ...        VCx - presented by x-1 

然后您必须在 VCx 上显示您的新 vc，即在当前显示/可见的最后一个 vc 上。