Precedentemente in iOS6, il controller della vista del messaggio di chat veniva visualizzato e animato correttamente con vincoli di autolayout accuratamente strutturati in IB. Ecco l'attuale gerarchia della vista con i vincoli rimossi in Xcode 5:Problemi iOS7 con NSIBPrototypingLayoutCalcoli di autolayoutConstraint generati da Interface Builder
Dopo l'aggiornamento a XCode 5 e iOS7, ho trovato che mi serviva per cancellare tutti i vecchi vincoli al fine di spiegare la barra di stato traslucido di default , altrimenti la mia barra degli strumenti cadrebbe sotto la barra di stato. Questo è successo nonostante abbia chiamato setEdgesForExtendedLayout: con UIRectEdgeNone.
Ora sto cercando di creare tutti i vincoli di programmazione in viewDidLoad:
// self.view.translatesAutoresizingMaskIntoConstraints = NO; // errors either way
NSArray *viewHorizConstraints = [NSLayoutConstraint constraintsWithVisualFormat:@"H:|[_toolbar]|" options:0 metrics:nil views:NSDictionaryOfVariableBindings(_toolbar)];
[self.view addConstraints:viewHorizConstraints];
viewHorizConstraints = [NSLayoutConstraint constraintsWithVisualFormat:@"H:|[_viewContainer]|" options:0 metrics:nil views:NSDictionaryOfVariableBindings(_viewContainer)];
[self.view addConstraints:viewHorizConstraints];
NSArray *viewVertConstraints = [NSLayoutConstraint constraintsWithVisualFormat:@"V:|-(20)-[_toolbar(44)]-[_viewContainer]|" options:0 metrics:nil views:NSDictionaryOfVariableBindings(_toolbar, _viewContainer)];
[self.view addConstraints:viewVertConstraints];
NSArray *tableContainerVertConstraints = [NSLayoutConstraint constraintsWithVisualFormat:@"V:|[_tableView(<[email protected])][_viewInputContainer(44)]|" options:0 metrics:nil views:NSDictionaryOfVariableBindings(_tableView, _viewInputContainer)];
[_viewTableContainer addConstraints:tableContainerVertConstraints];
NSArray *containerVertConstraints = [NSLayoutConstraint constraintsWithVisualFormat:@"V:|[_viewTableContainer][_viewOptions]" options:0 metrics:nil views:NSDictionaryOfVariableBindings(_viewTableContainer, _viewOptions)];
[_viewContainer addConstraints:containerVertConstraints];
// _constraintContainerVertSpace = [NSLayoutConstraint constraintWithItem:_viewTableContainer attribute:NSLayoutAttributeTrailing relatedBy:NSLayoutRelationEqual toItem:_viewContainer attribute:NSLayoutAttributeTrailing multiplier:1 constant:0]; // same as below
containerVertConstraints = [NSLayoutConstraint constraintsWithVisualFormat:@"V:[_viewTableContainer]|" options:0 metrics:nil views:NSDictionaryOfVariableBindings(_viewTableContainer)];
_constraintContainerVertSpace = [containerVertConstraints lastObject];
[_viewContainer addConstraint:_constraintContainerVertSpace];
containerVertConstraints = [NSLayoutConstraint constraintsWithVisualFormat:@"V:|-(>=0)-[_viewOptions]-(>[email protected])-|" options:0 metrics:nil views:NSDictionaryOfVariableBindings(_viewOptions)];
[_viewContainer addConstraints:containerVertConstraints];
Tuttavia, se si tenta di modificare il vincolo spazio verticale tra il mio containerView e tableContainerView, ottengo errori. (. Sto cercando di ridimensionare il tableContainerView a ridursi con l'aspetto della tastiera)
[UIView animateWithDuration:0.25f
delay:0
options:UIViewAnimationOptionCurveEaseInOut
animations:^{
_constraintContainerVertSpace.constant = -keyboardHeight;
} completion:nil];
Questi sono i vincoli che non riescono a soddisfare simultaneamente:
(
"<NSIBPrototypingLayoutConstraint:0x140d7bb0 'IB auto generated at build time for view with fixed frame' V:|-(460)-[UIView:0x140ddef0] (Names: '|':UIView:0x140dde60)>",
"<NSIBPrototypingLayoutConstraint:0x140d7c10 'IB auto generated at build time for view with fixed frame' V:[UIView:0x140ddef0(44)]>",
"<NSLayoutConstraint:0x14d9db30 V:[UIView:0x140ddef0]-(0)-| (Names: '|':UIView:0x140dde60)>",
"<NSIBPrototypingLayoutConstraint:0x140e0290 'IB auto generated at build time for view with fixed frame' V:|-(0)-[UIView:0x140dde60] (Names: '|':UIView:0x140dddd0)>",
"<NSLayoutConstraint:0x14d9df60 V:[UIView:0x140dde60]-(-216)-| (Names: '|':UIView:0x140dddd0)>",
"<NSIBPrototypingLayoutConstraint:0x140e0830 'IB auto generated at build time for view with fixed frame' V:|-(64)-[UIView:0x140dddd0] (Names: '|':UIView:0x140e0470)>",
"<NSLayoutConstraint:0x14d9d820 V:[UIView:0x140dddd0]-(0)-| (Names: '|':UIView:0x140e0470)>",
"<NSAutoresizingMaskLayoutConstraint:0x1403a0b0 h=--& v=--& V:[UIView:0x140e0470(568)]>"
)
Will attempt to recover by breaking constraint
<NSLayoutConstraint:0x14d9db30 V:[UIView:0x140ddef0]-(0)-| (Names: '|':UIView:0x140dde60)>
UIView: 0x140dde60 in questo caso è _viewTableContainer. 0x140ddef0 = _viewInputContainer. 0x140dddd0 = _viewContainer.
Perché questo NSIBPrototypingLayoutConstraint V: | - (460) - [UIView: 0x140ddef0 (_viewInputContainer)] viene creato da IB quando ho impostato translatesAutoresizingMaskIntoConstraints di NO, e quando ho già definito vincoli verticali non ambigui tra il _viewInputContainer e il _tableView sopra di esso?
Ho provato a utilizzare Cocoa Layout in Strumenti, ma c'è troppo rumore per dare un senso a tutto ciò.
Dai un'occhiata a questa domanda molto simile qui: http: // StackOverflow.it/questions/19015215/trouble-with-autolayout-on-uitableviewcell/19020006 # 19020006 – smileyborg