iphone - 在xcode中将动态大小设置为UILabels？

Question

我是objective-C的新手。我想设置动态大小（width和height）。 UILabels我有一个UILabel带有一些文本的文本。如果文本很大，如果它不适合该行，则应该通过转到其他行来正确显示行，如果数据完成，那么只有下一个UILabels数据应该开始，下一个也是相同的概念。UILabel我怎样才能得到它......？

Answer 1

以下是 viewcontroller.h 文件的代码

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController{
IBOutlet UITableView *dataTableView;
NSMutableArray *items;
}

@end

以下是 viewcontroller.m 文件的代码

#import "ViewController.h"
#import <QuartzCore/QuartzCore.h>

#define FONT_SIZE 14.0f
#define CELL_CONTENT_WIDTH 320.0f
#define CELL_CONTENT_MARGIN 10.0f

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad
{
[super viewDidLoad];

items = [[NSMutableArray alloc] init];
[items addObject:@"Happiness is having a large, loving, caring, close-knit family in another city.\n\n\t\t-George Burns (1896 - 1996)"];
[items addObject:@"When I am abroad, I always make it a rule never to criticize or attack the government of my own country. I make up for lost time when I come home.\n\n\t\t-Sir Winston Churchill (1874 - 1965)"];
[items addObject:@"After two years in Washington, I often long for the realism and sincerity of Hollywood.\n\n\t\t-Fred Thompson, Speech before the Commonwealth Club of California"];
[items addObject:@"It is a profitable thing, if one is wise, to seem foolish.\n\n\t\t-Aeschylus (525 BC - 456 BC)"];
[items addObject:@"Bill Gates is a very rich man today... and do you want to know why? The answer is one word: versions.\n\n\t\t-Dave Barry"];
[items addObject:@"At the worst, a house unkept cannot be so distressing as a life unlived.\n\n\t\t-Dame Rose Macaulay (1881 - 1958)"];
[items addObject:@"It is curious that physical courage should be so common in the world and moral courage so rare.\n\n\t\t-Mark Twain (1835 - 1910)"];
[items addObject:@"The knowledge of the world is only to be acquired in the world, and not in a closet.\n\n\t\t-Lord Chesterfield (1694 - 1773), Letters to His Son, 1746, published 1774"];
[items addObject:@"What lies behind us and what lies before us are tiny matters compared to what lies within us.\n\n\t\t-Ralph Waldo Emerson (1803 - 1882), (attributed)"];
}

#pragma mark -
#pragma mark UITableView Delegaates

- (NSInteger)tableView:(UITableView*)tableView numberOfRowsInSection:(NSInteger)section
{
return [items count];
}

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView;
{
return 1;
}

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath;
{
NSString *text = [items objectAtIndex:[indexPath row]];
CGSize constraint = CGSizeMake(CELL_CONTENT_WIDTH - (CELL_CONTENT_MARGIN * 2), 20000.0f);
CGSize size = [text 1="systemFontOfSize:FONT_SIZE" language="sizeWithFont:[UIFont"][/text] constrainedToSize:constraint lineBreakMode:NSLineBreakByWordWrapping];
CGFloat height = MAX(size.height, 44.0f);
return height + (CELL_CONTENT_MARGIN * 2);
}

- (UITableViewCell *)tableView:(UITableView *)tv cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
UITableViewCell *cell;
UILabel *label = nil;

cell = [tv dequeueReusableCellWithIdentifier:@"Cell"];
if (cell == nil)
{

cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"Cell"] ;
label = [[UILabel alloc] initWithFrame:CGRectZero];
[label setLineBreakMode:NSLineBreakByWordWrapping];
[label setFont:[UIFont systemFontOfSize:FONT_SIZE]];
[label setNumberOfLines:0];
[label setFont:[UIFont systemFontOfSize:FONT_SIZE]];
[label setTag:1];
[[cell contentView] addSubview:label];
}
NSString *text = [items objectAtIndex:[indexPath row]];

CGSize constraint = CGSizeMake(CELL_CONTENT_WIDTH - (CELL_CONTENT_MARGIN * 2), 20000.0f);

CGSize size = [text 1="systemFontOfSize:FONT_SIZE" language="sizeWithFont:[UIFont"][/text] constrainedToSize:constraint lineBreakMode:NSLineBreakByWordWrapping];

if (!label)
label = (UILabel*)[cell viewWithTag:1];

[label setText:text];
[label setFrame:CGRectMake(CELL_CONTENT_MARGIN, CELL_CONTENT_MARGIN, CELL_CONTENT_WIDTH - (CELL_CONTENT_MARGIN * 2), MAX(size.height, 44.0f))];

return cell;
}
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{
[dataTableView deselectRowAtIndexPath:[dataTableView indexPathForSelectedRow] animated:YES];
}
@end

也从这里下载源代码。

愿这有很大帮助。

Answer 2

如何根据文本设置标签，但我也想要背景颜色

使用这个链接，在这里你使用“textsize”来设置你的标签框架和后视图