uilabel 和uitextview 自适应大小

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本文转载至 http://blog.csdn.net/liulichao20/article/details/8957752

分类： ios2013-05-21 22:06 321人阅读评论(0) 收藏举报

//UILabel自动换行，自适应高度

UILabel *label = [[UILabel alloc] initWithFrame:CGRectZero];

[label setBackgroundColor:[UIColor clearColor]];

[label setFont:[UIFont systemFontOfSize:14]];

[label setLineBreakMode:UILineBreakModeWordWrap];

[label setNumberOfLines:0];

[self.view addSubview:label];

NSString *str = @" fsdfadsfdsfsdfads fdsfads水电费水电费水电费水电费水电费水电费水电费水电费水电费水电费水电费水电费水电费水电费时代fsdf ";

CGSize size = [str sizeWithFont:[UIFont systemFontOfSize:14]constrainedToSize:CGSizeMake(320,500) lineBreakMode:UILineBreakModeWordWrap];

[label setText:str];

[label setFrame:CGRectMake(0.0f, 20.0f, 300, size.height)];

[label release];

//UITextView自动换行，自适应高度

UITextView *textView = [[UITextView alloc] initWithFrame:CGRectMake(0, 150, 320,240)];

textView.backgroundColor = [UIColor clearColor];

textView.text = str;

textView.scrollEnabled = YES;

textView.font = [UIFont systemFontOfSize:14];

textView.userInteractionEnabled = NO;

textView.autoresizingMask = UIViewAutoresizingFlexibleHeight;

[self.view addSubview:textView];

本文转载至 http://tangchuanyao.com/20120507760/

自动调整UITextView/UILabel的高度height

1 条回复

很多时候都需要依据用户输入的内容自动调整UILabel/UITextView的高度和宽度，特别是UINavigationController的标题，超过一行的时候默认就是「…」我们希望他能换行表示，这样就需要根据内容调整titleView的高度啦。直接贴sample代码，高度和宽度可以根据自己的需要调整。

UILabel Sample code

CGRect frame = CGRectMake(20, 0, 280,44);

CGSize labelsize = [titleLabel.text sizeWithFont:[UIFont boldSystemFontOfSize: 16.0f]

constrainedToSize:CGSizeMake(320, 44)

lineBreakMode:UILineBreakModeTailTruncation];

frame.size.width = labelsize.width;

frame.size.height = labelsize.height;

titleLabel.frame = frame;

UITextView Sample code

CGRect frame = noteTextView.frame;

CGSize size = [noteTextView.text sizeWithFont:noteTextView.font

constrainedToSize:CGSizeMake(280, 1000)

lineBreakMode:UILineBreakModeTailTruncation];

frame.size.height = size.height > 1 ? size.height + 20 : 64;

noteTextView.frame = frame;

UITextView是UIScrollView的子类，因此有contentSize属性，也可以按如下实现

CGRect frame = noteTextView.frame;

frame.size.height = noteTextView.contentSize.height;

noteTextView.frame = frame;

本文转载至 http://blog.sina.com.cn/s/blog_759d3e120101alji.html

苹果API

UILineBreakMode

Options for wrapping and truncating text. (Deprecated. Use NSLineBreakMode instead.)

typedef enum {
   UILineBreakModeWordWrap = 0,
   UILineBreakModeCharacterWrap,
   UILineBreakModeClip,
   UILineBreakModeHeadTruncation,
   UILineBreakModeTailTruncation,
   UILineBreakModeMiddleTruncation,
} UILineBreakMode;

NSLineBreakMode

These constants specify what happens when a line is too long for its container.

enum {
   NSLineBreakByWordWrapping = 0,
   NSLineBreakByCharWrapping,
   NSLineBreakByClipping,
   NSLineBreakByTruncatingHead,
   NSLineBreakByTruncatingTail,
   NSLineBreakByTruncatingMiddle
};
typedef NSUInteger NSLineBreakMode

lineBreak模式在6.0之前一直用UILineBreakMode枚举类型，6.0使用NSLineBreakMode枚举类型。枚举值中各个值的意义，解释如下：

   UILineBreakModeWordWrap = 0,
   以单词为单位换行，以单位为单位截断。
   UILineBreakModeCharacterWrap,
   以字符为单位换行，以字符为单位截断。
   UILineBreakModeClip,
   以单词为单位换行。以字符为单位截断。
   UILineBreakModeHeadTruncation,
   以单词为单位换行。如果是单行，则开始部分有省略号。如果是多行，则中间有省略号，省略号后面有4个字符。
   UILineBreakModeTailTruncation,
   以单词为单位换行。无论是单行还是多行，都是末尾有省略号。
   UILineBreakModeMiddleTruncation,
   以单词为单位换行。无论是单行还是多行，都是中间有省略号，省略号后面只有2个字符。