UITableViewCell的 Cell 内的图片自适应高度

  1 #import "MainViewController.h"
  2
  3 #import "MyCell.h"
  4
  5 @interface MainViewController ()<UITableViewDelegate, UITableViewDataSource>;
  6
  7
  8
  9 @end
 10
 11
 12 @implementation MainViewController
 13
 14
 15 - (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
 16
 17 {
 18
 19     self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
 20
 21     if (self) {
 22
 23         // Custom initialization
 24
 25
 26
 27         self.array = [NSMutableArray array];
 28
 29
 30
 31         for (int i = 0; i < 26; i++) {
 32
 33             UIImage *image = [UIImage imageNamed:[NSString stringWithFormat:@"%d.jpg", i]];
 34
 35             [self.array addObject:image];
 36
 37         }
 38
 39     }
 40
 41     return self;
 42
 43 }
 44
 45
 46 - (void)viewDidLoad
 47
 48 {
 49
 50     [super viewDidLoad];
 51
 52     // Do any additional setup after loading the view.
 53
 54
 55
 56     self.tableView = [[UITableView alloc] initWithFrame:CGRectMake(0, 0, 320, 480)style:UITableViewStylePlain];
 57
 58     self.tableView.delegate = self;
 59
 60     self.tableView.dataSource = self;
 61
 62
 63
 64     [self.view addSubview:self.tableView];
 65
 66     [self.tableView release];
 67
 68 }
 69
 70
 71 - (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
 72
 73 {
 74
 75     // 在tableView的协议方法中制定 每个cell的高度
 76
 77
 78
 79     UIImage *image = [self.array objectAtIndex:indexPath.row];
 80
 81
 82
 83     // cell的高度 = cell的宽度 * 图片的高度 / 图片的宽度
 84
 85     CGFloat cellHeight = tableView.bounds.size.width * image.size.height / image.size.width;
 86
 87     return cellHeight;
 88
 89
 90
 91 }
 92
 93
 94 - (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
 95
 96 {
 97
 98     NSLog(@"%d", self.array.count);
 99
100     return [self.array count];
101
102 }
103
104 - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
105
106 {
107
108     static NSString *cellID = @"Reuse";
109
110     MyCell *cell = [tableView dequeueReusableCellWithIdentifier:cellID];
111
112     if (cell == nil) {
113
114         cell = [[[MyCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellID]autorelease];
115
116     }
117
118     UIImage *image = [self.array objectAtIndex:indexPath.row];
119
120     cell.myImageView.image = image;
121
122     return cell;
123
124 }
125
126 - (void)didReceiveMemoryWarning
127
128 {
129
130     [super didReceiveMemoryWarning];
131
132     // Dispose of any resources that can be recreated.
133
134 }