IOS表视图动态高度实现实例
作者：朱克锋
转载请注明出处：http://blog.csdn.net/linux_zkf
文件头
#import <UIKit/UIKit.h>
@interface DynamicHeightsViewController : UIViewController {
IBOutlet UITableView *dataTableView;
NSMutableArray *items;
}
@end
文件实现#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];
//your str add by you 自己添加长度不同的字符进行测试
[items addObject:@"your str add by you"];
[items addObject:@"your str add by you"];
[items addObject:@"your str add by you"];
[items addObject:@"your str add by you"];
[items addObject:@"your str add by you"];
[items addObject:@"your str add by you"];
[items addObject:@"your str add by you"];
[items addObject:@"your str add by you"];
[items addObject:@"your str add by you"];
}
- (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), 99999.0f);
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:@"MyCell"];
if (cell == nil)
{
cell = [[[UITableViewCell alloc] initWithFrame:CGRectZero reuseIdentifier:@"MyCell"] 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;
}
@end