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iOS cell自动换行

2013年10月25日 ⁄ 综合 ⁄ 共 3848字 ⁄ 字号 评论关闭

//

//  DynamicHeightsViewController.h

//  DynamicHeights

//

//  Created by Matt Long on 9/22/09.

//  Copyright Skye Road Systems, Inc. 2009. All rights reserved.

//

#import <UIKit/UIKit.h>

@interface DynamicHeightsViewController :
UIViewController
{

    IBOutlet UITableView *dataTableView;

    

    NSMutableArray *items;

}

@end

////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////

//

//  DynamicHeightsViewController.m

//  DynamicHeights

//

//  Created by Matt Long on 9/22/09.

//  Copyright Skye Road Systems, Inc. 2009. All rights reserved.

//

#import "DynamicHeightsViewController.h"

#define FONT_SIZE 14.0f

#define CELL_CONTENT_WIDTH 320.0f

#define CELL_CONTENT_MARGIN 10.0f

@implementation DynamicHeightsViewController

- (void)viewDidLoad {

    [super
viewDidLoad];

    

    items = [[NSMutableArray
alloc] init];

    [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 Californiaaaagdd阿黑哥是否规范的阿黑哥是否规范的阿黑哥是否规范的阿黑哥是否规范的阿黑哥是否规范的阿黑哥是否规范的阿黑哥是否ll"];

    [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)"];

     

}

- (void)dealloc {

    [items release],
items = nil;

    [super dealloc];

}

#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
sizeWithFont:[UIFont
systemFontOfSize:FONT_SIZE]
constrainedToSize:constraint lineBreakMode:UILineBreakModeWordWrap];

    

    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] initWithFrame:CGRectZero
reuseIdentifier:@"Cell"]
autorelease];

        

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

        [label setLineBreakMode:UILineBreakModeWordWrap];

        [label setMinimumFontSize:FONT_SIZE];

        [label setNumberOfLines:0];

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

        [label setTag:1];

        

        [[label layer] setBorderWidth:2.0f];

        

        [[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
sizeWithFont:[UIFont
systemFontOfSize:FONT_SIZE]
constrainedToSize:constraint lineBreakMode:UILineBreakModeWordWrap];

    

    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;

}

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