自動レイアウトのUIView、彼のサイズを取得
私は1人のUIView魔女がプログラムでコンテンツを入力しています。このUIViewのレイアウトは、自動レイアウトを使用して作成されます。
このビューは、1つのUIScrollViewのサブビューである必要があり、垂直方向にスクロールする必要があります。
私はこのようなコードを持っています：
_// self.scrollview is defined in IB and it has constraints to edges (margin:0 0 0 0)
UIView *contentView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 1024, MAXFLOAT)];
[contentView setTranslatesAutoresizingMaskIntoConstraints:YES];
// Then I call some my parser which add subviews to the contentView and layout them using constraints.
[self.scrollview addSubview:contentView];
[contentView setNeedsLayout];
[contentView layoutIfNeeded];
// Now, I need to know height of the contentView to be able to set contentSize to self.scrollview
_//[〜＃〜] update [〜＃〜]
わかりました。このUILabelを、[[UIView alloc] initWithFrame:CGRectMake(self.layoutMargin, self.layoutMargin, 1024 - self.layoutMargin*2, 100)]);で作成されたUIViewであるself.contentに追加しました。
このself.contentビューは私にとって単なるコンテナであり、UIScrollViewに配置する必要があります。 UIScrollViewのcontentSizeを設定するには、self.contentの高さが必要です。
_[self.content setTranslatesAutoresizingMaskIntoConstraints:YES];
[self.content setContentHuggingPriority:UILayoutPriorityRequired forAxis:UILayoutConstraintAxisVertical];
[self.content setContentCompressionResistancePriority:UILayoutPriorityRequired forAxis:UILayoutConstraintAxisVertical];
UILabel *textlabel = [[UILabel alloc] init];
UIFont *font;
font = [UIFont fontWithName:@"InterstatePlus-Regular" size:16];
UIFont *bold;
bold = [UIFont fontWithName:@"InterstatePlus-Bold" size:16];
NSDictionary *style = @{
@"$default" : @{NSFontAttributeName : font},
@"b" : @{NSFontAttributeName : bold},
@"em" : @{NSFontAttributeName : [UIFont fontWithName:@"HelveticaNeue-Italic" size:14]},
@"h1" : @{NSFontAttributeName : [UIFont fontWithName:@"HelveticaNeue-Medium" size:48]},
@"h2" : @{NSFontAttributeName : [UIFont fontWithName:@"HelveticaNeue-Medium" size:36]},
@"h3" : @{NSFontAttributeName : [UIFont fontWithName:@"HelveticaNeue-Medium" size:32]},
@"h4" : @{NSFontAttributeName : [UIFont fontWithName:@"HelveticaNeue-Medium" size:24]},
@"h5" : @{NSFontAttributeName : [UIFont fontWithName:@"HelveticaNeue-Medium" size:18]},
@"h6" : @{NSFontAttributeName : [UIFont fontWithName:@"HelveticaNeue-Medium" size:16]}
};
[textlabel setNumberOfLines:0];
NSError *error = nil;
NSString *string = @"Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing <br>Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type<br> and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.";
NSString *replacedString = [string stringByReplacingOccurrencesOfString:@"<br>" withString:@"\n"];
NSAttributedString *attributedString = [SLSMarkupParser attributedStringWithMarkup:replacedString style:style error:&error];
NSMutableAttributedString *mutAttributedString = [[NSMutableAttributedString alloc] initWithAttributedString:attributedString];
NSInteger strLength = [attributedString length];
NSMutableParagraphStyle *paragraphstyle = [[NSMutableParagraphStyle alloc] init];
[mutAttributedString addAttribute:NSParagraphStyleAttributeName
value:paragraphstyle
range:NSMakeRange(0, strLength)];
if (mutAttributedString) {
textlabel.attributedText = mutAttributedString;
}
[textlabel setTranslatesAutoresizingMaskIntoConstraints:NO];
[textlabel setContentHuggingPriority:UILayoutPriorityRequired forAxis:UILayoutConstraintAxisVertical];
[textlabel setContentCompressionResistancePriority:UILayoutPriorityRequired forAxis:UILayoutConstraintAxisVertical];
textlabel.textAlignment = NSTextAlignmentLeft;
[textlabel setTextColor:[UIColor blackColor]];
[textlabel setBackgroundColor:[UIColor clearColor]];
textlabel.lineBreakMode = NSLineBreakByWordWrapping;
[textlabel setNumberOfLines:0];
[self.content addSubview:textlabel];
[textlabel mas_makeConstraints:^(MASConstraintMaker *make) {
make.top.equalTo(self.content.mas_top).with.offset(0);
make.right.equalTo(self.content.mas_right).with.offset(0);
make.height.equalTo(@1200);
make.left.equalTo(self.content.mas_left).with.offset(0);
}];
[self.containerView addSubview:self.content];
[self.containerView setBackgroundColor:[UIColor redColor]];
[self.content setBackgroundColor:[UIColor yellowColor]];
CGSize s = [self.content systemLayoutSizeFittingSize:UILayoutFittingCompressedSize];
NSLog(@"Size: %f %f", s.width, s.height);
_これはログです：サイズ：17713.000000 0.000000
そしてそれは次のようになります： http://d.pr/i/Rxk
sizeToFitは、自動レイアウトを使用している場合に使用するのに間違ったAPIです。
自動レイアウトに使用する正しいAPIはUIViewsystemLayoutSizeFittingSize：であり、おそらくUILayoutFittingCompressedSizeを渡します。これにより、指定された制約でビューをバインドできる最小サイズであるCGSizeが返されます。
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編集：投稿された追加コードへの応答...
Masonry ライブラリをこれまで使用したことはありませんが、すっきりしています！
UILabelsは、テキストを表示するのに十分な大きさのintrinsicContentSizeを提供します。複数行のテキストのこのサイズを計算するには、ラベルは固定される単一の寸法を知っている必要があります。これは、preferredMaxLayoutWidthプロパティを介した目的の幅の寸法です。 preferredMaxLayoutWidth値（デフォルトは0）を指定しない場合、ラベルは、1行のテキストをレイアウトしているかのように固有のコンテンツサイズを計算します。
コードでは、ラベルのpreferredMaxLayoutWidthを設定しないため、ラベルのintrinsicContentSizeに依存するautolayoutによって実行されるレイアウトは、期待したものにはなりません。
私はあなたのコードを取り、それを新しい例に蒸留しました。それはあなたがきれいなviewcontrollerサブクラスにコピー/貼り付けできるはずです：
#import "Masonry.h"
@interface TSViewController ()
@end
@implementation TSViewController
{
UIScrollView* _scrollView;
UIView* _containerView;
UILabel* _titleLabel;
UILabel* _contentLabel;
}
- (void) viewDidLoad
{
[super viewDidLoad];
self.view.backgroundColor = [UIColor darkGrayColor];
// create/configure our scrollview
_scrollView = [UIScrollView new];
_scrollView.translatesAutoresizingMaskIntoConstraints = NO;
_scrollView.backgroundColor = [UIColor scrollViewTexturedBackgroundColor];
[self.view addSubview: _scrollView];
// create/configure our container
_containerView = [UIView new];
_containerView.translatesAutoresizingMaskIntoConstraints = NO;
_containerView.backgroundColor = [UIColor yellowColor];
[_scrollView addSubview: _containerView];
// create/configure our content - title and content labels
_titleLabel = [UILabel new];
_titleLabel.translatesAutoresizingMaskIntoConstraints = NO;
_titleLabel.numberOfLines = 1;
_titleLabel.font = [UIFont fontWithName: @"Courier" size: 80];
_titleLabel.text = @"Lorem Ipsum";
_titleLabel.backgroundColor = [UIColor lightGrayColor];
_titleLabel.textAlignment = NSTextAlignmentCenter;
[_containerView addSubview: _titleLabel];
_contentLabel = [UILabel new];
_contentLabel.translatesAutoresizingMaskIntoConstraints = NO;
_contentLabel.numberOfLines = 0;
_contentLabel.font = [UIFont fontWithName: @"Courier" size: 40];
_contentLabel.text = self.loremIpsum;
[_containerView addSubview: _contentLabel];
// configure constraints for each view:
[_scrollView mas_makeConstraints: ^(MASConstraintMaker *make) {
// glue the scrollview to its superview with a 20 point inset:
make.top.equalTo( self.view.mas_top ).with.offset( 20 );
make.left.equalTo( self.view.mas_left ).with.offset( 20 );
make.right.equalTo( self.view.mas_right ).with.offset( -20 );
make.bottom.equalTo( self.view.mas_bottom ).with.offset( -20 );
}];
[_containerView mas_makeConstraints: ^(MASConstraintMaker *make) {
// per the iOS 6.0 Release Notes, this is how to use auto-layout for a container view
// inside a scrollview. basically, tie the edges of the containerview to the scrollview.
// http://developer.Apple.com/library/ios/#releasenotes/General/RN-iOSSDK-6_0/
// see section "Here are some notes regarding Auto Layout support for UIScrollView"
make.top.equalTo( _scrollView.mas_top );
make.left.equalTo( _scrollView.mas_left );
make.right.equalTo( _scrollView.mas_right );
make.bottom.equalTo( _scrollView.mas_bottom );
// match the width of the containerview to the scrollview width:
make.width.equalTo( _scrollView.mas_width );
// match the height of the containerview to the intrinsic height of the contentlabel + 100 points for our fixed height title
// (this is the magical part.)
make.height.equalTo( _contentLabel.mas_height ).with.offset( 100 );
}];
[_titleLabel mas_makeConstraints:^(MASConstraintMaker *make) {
// tie the contentlabel edges to the sides of its container:
make.top.equalTo( _containerView.mas_top ).with.offset(0);
make.left.equalTo( _containerView.mas_left ).with.offset(0);
make.right.equalTo( _containerView.mas_right ).with.offset(0);
// fixed height
make.height.equalTo( @100 );
}];
[_contentLabel mas_makeConstraints:^(MASConstraintMaker *make) {
// tie top Edge to the bottom of our title
make.top.equalTo( _titleLabel.mas_bottom );
// tie the remaining edges to the sides of the container:
make.left.equalTo( _containerView.mas_left );
make.right.equalTo( _containerView.mas_right );
make.bottom.equalTo( _containerView.mas_bottom );
}];
}
- (void) viewWillLayoutSubviews
{
// perform a scrollview layout so the containerView width will be set
[_scrollView setNeedsLayout];
[_scrollView layoutIfNeeded];
// update the preferred layout width of the content label;
// this affects the label's intrinsicContentSize and will force our constraints to be recalculated
CGFloat preferredWidth = _containerView.frame.size.width;
_contentLabel.preferredMaxLayoutWidth = preferredWidth;
// we don't need this since the scrollview is fully using autolayout to adjust the content-size. but just to show that it works:
CGSize fittingSize = [_containerView systemLayoutSizeFittingSize: UILayoutFittingCompressedSize];
NSLog( @"container fitting size: %@", NSStringFromCGSize( fittingSize ));
}
- (NSString*) loremIpsum
{
return @"Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing <br>Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type<br> and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.";
}
@end
そして、制約がすべてうまく機能しているときのsystemLayoutSizeFittingSizeからの出力は次のとおりです。
2013-08-05 15:01:16.309 testLabelConstraints[8265:c07] container fitting size: {721, 6868}
私があなたを理解しているなら、問題は、それらがScrollViewのサブビューであるときに、適切にスクロールするように動的にサイズ設定される1つまたは複数のビューを取得することです。これで、私はこの問題を抱えており、コンテンツのサイズを気にすることなく解決できます。
Apple "UIScrollView andAutolayout"というタイトルのテクニカルノートへのリンクはこちらです
http://developer.Apple.com/library/ios/technotes/tn2154/_index.html
この問題を解決するための2つのアプローチを詳しく説明しているメモには、ソースをたどるのは簡単です。これがお役に立てば幸いです、それは本当に私を助けました。
さらに、ScrollView内のサブビューのコレクションを反復処理しようとしている場合は、この記事と例をもう一度読んで、コードを使用してわかりやすく説明してください。
ApethプログラミングIOS 6、第20章。ここでビューをオンラインでスクロールします。