//
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// TPMultiLayoutViewController.m
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//
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// Created by Michael Tyson on 14/08/2011.
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// Copyright 2011 A Tasty Pixel. All rights reserved.
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//
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#import "TPMultiLayoutViewController.h"
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#define VERBOSE_MATCH_FAIL 1 // Comment this out to be less verbose when associated views can't be found
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@interface TPMultiLayoutViewController ()
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- (NSDictionary*)attributeTableForViewHierarchy:(UIView*)rootView associateWithViewHierarchy:(UIView*)associatedRootView;
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- (void)addAttributesForSubviewHierarchy:(UIView*)view associatedWithSubviewHierarchy:(UIView*)associatedView toTable:(NSMutableDictionary*)table;
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- (UIView*)findAssociatedViewForView:(UIView*)view amongViews:(NSArray*)views;
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- (void)applyAttributeTable:(NSDictionary*)table toViewHierarchy:(UIView*)view;
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- (NSDictionary*)attributesForView:(UIView*)view;
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- (void)applyAttributes:(NSDictionary*)attributes toView:(UIView*)view;
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- (BOOL)shouldDescendIntoSubviewsOfView:(UIView*)view;
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@end
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@implementation TPMultiLayoutViewController
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@synthesize portraitView, landscapeView, viewIsCurrentlyPortrait;
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#pragma mark - View lifecycle
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- (void)viewDidLoad {
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[super viewDidLoad];
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// Construct attribute tables
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portraitAttributes = [self attributeTableForViewHierarchy:portraitView associateWithViewHierarchy:self.view];
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landscapeAttributes = [self attributeTableForViewHierarchy:landscapeView associateWithViewHierarchy:self.view];
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viewIsCurrentlyPortrait = (self.view == portraitView);
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// Don't need to retain the original template view hierarchies any more
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self.portraitView = nil;
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self.landscapeView = nil;
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}
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- (void)dealloc {
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portraitAttributes = nil;
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landscapeAttributes = nil;
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}
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- (void)viewWillAppear:(BOOL)animated {
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// Display correct layout for orientation
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/*if ( (UIInterfaceOrientationIsPortrait(self.interfaceOrientation) && !viewIsCurrentlyPortrait) ||
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(UIInterfaceOrientationIsLandscape(self.interfaceOrientation) && viewIsCurrentlyPortrait) ) {
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[self applyLayoutForInterfaceOrientation:self.interfaceOrientation];
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}*/
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[super viewWillAppear:animated];
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}
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#pragma mark - Rotation
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- (void)applyLayoutForInterfaceOrientation:(UIInterfaceOrientation)newOrientation {
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NSDictionary *table = UIInterfaceOrientationIsPortrait(newOrientation) ? portraitAttributes : landscapeAttributes;
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[self applyAttributeTable:table toViewHierarchy:self.view];
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viewIsCurrentlyPortrait = UIInterfaceOrientationIsPortrait(newOrientation);
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}
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- (void)willAnimateRotationToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration {
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[super willAnimateRotationToInterfaceOrientation:toInterfaceOrientation duration:duration];
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//if ( (UIInterfaceOrientationIsPortrait(toInterfaceOrientation) && !viewIsCurrentlyPortrait) ||
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// (UIInterfaceOrientationIsLandscape(toInterfaceOrientation) && viewIsCurrentlyPortrait) ) {
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[self applyLayoutForInterfaceOrientation:toInterfaceOrientation];
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//}
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}
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#pragma mark - Helpers
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- (NSDictionary*)attributeTableForViewHierarchy:(UIView*)rootView associateWithViewHierarchy:(UIView*)associatedRootView {
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NSMutableDictionary *table = [NSMutableDictionary dictionary];
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[self addAttributesForSubviewHierarchy:rootView associatedWithSubviewHierarchy:associatedRootView toTable:table];
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return table;
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}
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- (void)addAttributesForSubviewHierarchy:(UIView*)view associatedWithSubviewHierarchy:(UIView*)associatedView toTable:(NSMutableDictionary*)table {
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[table setObject:[self attributesForView:view]
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forKey:[NSValue valueWithPointer:(__bridge const void *)(associatedView)]];
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if (![self shouldDescendIntoSubviewsOfView:view])
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return;
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for (UIView *subview in view.subviews) {
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UIView *associatedSubView = (view == associatedView ? subview : [self findAssociatedViewForView:subview amongViews:associatedView.subviews]);
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if ( associatedSubView ) {
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[self addAttributesForSubviewHierarchy:subview associatedWithSubviewHierarchy:associatedSubView toTable:table];
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}
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}
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}
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- (UIView*)findAssociatedViewForView:(UIView*)view amongViews:(NSArray*)views {
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// First try to match tag
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if ( view.tag != 0 ) {
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UIView *associatedView = [[views filteredArrayUsingPredicate:[NSPredicate predicateWithFormat:@"tag = %d", view.tag]] lastObject];
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if ( associatedView ) return associatedView;
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}
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// Next, try to match class, targets and actions, if it's a control
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if ( [view isKindOfClass:[UIControl class]] && [[(UIControl*)view allTargets] count] > 0 ) {
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for ( UIView *otherView in views ) {
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if ( [otherView isKindOfClass:[view class]]
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&& [[(UIControl*)otherView allTargets] isEqualToSet:[(UIControl*)view allTargets]]
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&& [(UIControl*)otherView allControlEvents] == [(UIControl*)view allControlEvents] ) {
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// Try to match all actions and targets for each associated control event
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BOOL allActionsMatch = YES;
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UIControlEvents controlEvents = [(UIControl*)otherView allControlEvents];
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for ( id target in [(UIControl*)otherView allTargets] ) {
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// Iterate over each bit in the UIControlEvents bitfield
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for ( NSInteger i=0; i<sizeof(UIControlEvents)*8; i++ ) {
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UIControlEvents event = 1 << i;
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if ( !(controlEvents & event) ) continue;
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if ( ![[(UIControl*)otherView actionsForTarget:target forControlEvent:event] isEqualToArray:[(UIControl*)view actionsForTarget:target forControlEvent:event]] ) {
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allActionsMatch = NO;
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break;
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}
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}
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if ( !allActionsMatch ) break;
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}
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if ( allActionsMatch ) {
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return otherView;
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}
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}
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}
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}
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// Next, try to match title or image, if it's a button
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if ( [view isKindOfClass:[UIButton class]] ) {
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for ( UIView *otherView in views ) {
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if ( [otherView isKindOfClass:[view class]] && [[(UIButton*)otherView titleForState:UIControlStateNormal] isEqualToString:[(UIButton*)view titleForState:UIControlStateNormal]] ) {
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return otherView;
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}
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}
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for ( UIView *otherView in views ) {
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if ( [otherView isKindOfClass:[view class]] && [(UIButton*)otherView imageForState:UIControlStateNormal] == [(UIButton*)view imageForState:UIControlStateNormal] ) {
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return otherView;
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}
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}
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}
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// Try to match by title if it's a label
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if ( [view isKindOfClass:[UILabel class]] ) {
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for ( UIView *otherView in views ) {
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if ( [otherView isKindOfClass:[view class]] && [[(UILabel*)otherView text] isEqualToString:[(UILabel*)view text]] ) {
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return otherView;
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}
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}
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}
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// Try to match by text/placeholder if it's a text field
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if ( [view isKindOfClass:[UITextField class]] ) {
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for ( UIView *otherView in views ) {
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if ( [otherView isKindOfClass:[view class]] && ([(UITextField*)view text] || [(UITextField*)view placeholder]) &&
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((![(UITextField*)view text] && ![(UITextField*)otherView text]) || [[(UITextField*)otherView text] isEqualToString:[(UITextField*)view text]]) &&
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((![(UITextField*)view placeholder] && ![(UITextField*)otherView placeholder]) || [[(UITextField*)otherView placeholder] isEqualToString:[(UITextField*)view placeholder]]) ) {
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return otherView;
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}
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}
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}
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// Finally, try to match by class
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NSArray *matches = [views filteredArrayUsingPredicate:[NSPredicate predicateWithFormat:@"class = %@", [view class]]];
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if ( [matches count] == 1 ) return [matches lastObject];
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#if VERBOSE_MATCH_FAIL
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NSMutableString *path = [NSMutableString string];
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for ( UIView *v = view.superview; v != nil; v = v.superview ) {
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[path insertString:[NSString stringWithFormat:@"%@ => ", NSStringFromClass([v class])] atIndex:0];
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}
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NSLog(@"Couldn't find match for %@%@", path, NSStringFromClass([view class]));
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#endif
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return nil;
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}
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- (void)applyAttributeTable:(NSDictionary*)table toViewHierarchy:(UIView*)view {
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NSDictionary *attributes = [table objectForKey:[NSValue valueWithPointer:(__bridge const void *)(view)]];
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if (attributes) {
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[self applyAttributes:attributes toView:view];
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}
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//if ( view.hidden ) return;
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if ( ![self shouldDescendIntoSubviewsOfView:view] ) return;
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for ( UIView *subview in view.subviews ) {
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[self applyAttributeTable:table toViewHierarchy:subview];
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}
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}
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- (NSDictionary*)attributesForView:(UIView*)view {
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NSMutableDictionary *attributes = [NSMutableDictionary dictionary];
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[attributes setObject:[NSValue valueWithCGRect:view.frame] forKey:@"frame"];
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[attributes setObject:[NSValue valueWithCGRect:view.bounds] forKey:@"bounds"];
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[attributes setObject:[NSNumber numberWithBool:view.hidden] forKey:@"hidden"];
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[attributes setObject:[NSNumber numberWithInteger:view.autoresizingMask] forKey:@"autoresizingMask"];
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return attributes;
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}
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- (void)applyAttributes:(NSDictionary*)attributes toView:(UIView*)view {
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view.frame = [[attributes objectForKey:@"frame"] CGRectValue];
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view.bounds = [[attributes objectForKey:@"bounds"] CGRectValue];
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view.hidden = [[attributes objectForKey:@"hidden"] boolValue];
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view.autoresizingMask = [[attributes objectForKey:@"autoresizingMask"] integerValue];
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}
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- (BOOL)shouldDescendIntoSubviewsOfView:(UIView*)view {
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if ( [view isKindOfClass:[UISlider class]] ||
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[view isKindOfClass:[UISwitch class]] ||
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[view isKindOfClass:[UITextField class]] ||
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[view isKindOfClass:[UITableView class]] ||
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[view isKindOfClass:[UIPickerView class]] ||
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[view isKindOfClass:[UIDatePicker class]] ||
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[view isKindOfClass:[UITextView class]] ||
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[view isKindOfClass:[UIProgressView class]] ||
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[view isKindOfClass:[UISegmentedControl class]] ) return NO;
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return YES;
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}
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@end
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