创建后调整uiview子类的大小
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【中文标题】创建后调整uiview子类的大小【英文标题】:resize uiview subclass after creation 【发布时间】:2012-02-23 03:54:57 【问题描述】:是否有一种快速简便的方法可以在创建 UIView 后调整其大小并使其子视图也调整大小?
我有一个自定义的 UIView 子类,叫做 AnagramLetter,它的实现和接口代码如下所示:
@interface AnagramLetter : UIView
UILabel *letterLbl;
UIImageView *letterBG;
@property (nonatomic, retain) UILabel *letterLbl;
@property (nonatomic, retain) UIImageView *letterBG;
@end
@implementation AnagramLetter
@synthesize letterLbl,letterBG;
- (id)initWithFrame:(CGRect)frame
frame = CGRectMake(0, 0, 166, 235);
CGRect lblFrame = CGRectMake(1, 1, 164,164);
self = [super initWithFrame:frame];
[self setAutoresizesSubviews:YES];
if (self)
// Initialization code
letterBG = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"anagram_correct_bg.png"]];
[self addSubview:letterBG];
letterLbl = [[UILabel alloc] initWithFrame:lblFrame];
letterLbl.backgroundColor = [UIColor clearColor];
letterLbl.textColor = [UIColor blackColor];
letterLbl.textAlignment = UITextAlignmentCenter;
letterLbl.numberOfLines = 0;
letterLbl.minimumFontSize = 50;
letterLbl.font = [UIFont boldSystemFontOfSize:144];
letterLbl.adjustsFontSizeToFitWidth = YES;
[self addSubview:letterLbl];
return self;
@end
当我按下 UI 上的按钮时,我会调用一个方法,该方法生成上述项目的列表并沿其 X 轴填充 UIView,为给定字符串中的每个字符创建一个 UIView。在我这样做之前,我得到了 UIView(称为 anagramHolder)的尺寸,除以单词中的字符数。然后我在 UIView 初始化后设置它的边界/框架,但到目前为止,创建的 AnagramLetter 视图的行为没有变化。
下面是我用来获取尺寸、更改创建的子类的边界并将项目添加到 anagramHolder UIView 的代码。
- (void) createAnagram
float aWidth = 166.0;
float aHeight = 235.0;
CGRect rect = [anagramHolder bounds];
if (!anagramCreated)
for (int i=0; i<[word length]; i++)
AnagramLetter *a;
if ((rect.size.width / [scrambled length]) < 166)
float percentDiff = ((rect.size.width / [scrambled length]) / 166);
aWidth = (rect.size.width / [scrambled length]);
aHeight = aHeight * percentDiff;
CGRect newBounds = CGRectMake(0, 0, aWidth, aHeight);
a = [[AnagramLetter alloc] initWithFrame:newBounds];
else a = [[AnagramLetter alloc] init];
[a setAutoresizingMask:UIViewAutoresizingFlexibleWidth|UIViewAutoresizingFlexibleHeight];
[a setAutoresizesSubviews:YES];
CGPoint pos;
pos.x = (i * (rect.size.width / [scrambled length])) + (aWidth/2);
pos.y = (rect.size.height/2);
[a setCenter:pos];
[a.letterLbl setText:[NSString stringWithFormat:@"%c",[scrambled characterAtIndex:i]]];
a.tag = i;
[anagramHolder addSubview:a];
[anagramLetters addObject:a];
[a release];
anagramCreated = YES;
[self getAnagramResult];
【问题讨论】:
【参考方案1】:自动调整特定view
的子视图大小的最简单方法是设置名为autoresizingMask
的subviews
属性的适当值。
例如,
UIView *view;
view.autoresizesSubviews = YES;
UIView *subview;
subview.autoresizingMask = UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleRightMargin | UIViewAutoresizingFlexibleWidth;
[view addSubview:subview];
来自 Apple 文档:
UIViewAutoresizing Specifies how a view is automatically resized.
enum
UIViewAutoresizingNone = 0,
UIViewAutoresizingFlexibleLeftMargin = 1 << 0,
UIViewAutoresizingFlexibleWidth = 1 << 1,
UIViewAutoresizingFlexibleRightMargin = 1 << 2,
UIViewAutoresizingFlexibleTopMargin = 1 << 3,
UIViewAutoresizingFlexibleHeight = 1 << 4,
UIViewAutoresizingFlexibleBottomMargin = 1 << 5 ;
typedef NSUInteger UIViewAutoresizing;
更多信息可以在这里找到:UIView
附:我还使用autoresizingMask
来设计我的 iPhone 和 iPad 应用程序。
【讨论】:
感谢您的评论,我已经在我的 AnagramLetter.m 文件和我的主要实现文件中尝试了您上面的代码,但仍然没有效果。知道我可能做错了什么吗? 在我的实现文件中,在添加 letterBG 子视图之前,我添加了以下代码:letterBG.autoresizingMask = UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleRightMargin | UIViewAutoresizingFlexibleWidth;
同样,我在添加 letterLbl 作为子视图之前添加了 letterLbl.autoresizingMask = UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleRightMargin | UIViewAutoresizingFlexibleWidth;
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