iOS 图片缩放 + 自定义cell
#import "MyTableViewCell.h"
@implementation MyTableViewCell
//图片
- (UIImageView *)headerImg{
if (!_headerImg) {
_headerImg = [[UIImageView alloc]initWithFrame:CGRectMake(10, 20, 44, 44)];
_headerImg.layer.cornerRadius = 44 / 2;
_headerImg.layer.masksToBounds = YES;
}
return _headerImg;
}
//标题
- (UILabel *)titleLabel{
if (!_titleLabel) {
_titleLabel = [[UILabel alloc]initWithFrame:CGRectMake(70, 5, 80, 30)];
_titleLabel.font = [UIFont systemFontOfSize:20];
}
return _titleLabel;
}
//副标题
- (UILabel *)subLabel{
if (!_subLabel) {
_subLabel = [[UILabel alloc]initWithFrame:CGRectMake(70, 40, 300, 30)];
_subLabel.textColor = [UIColor lightGrayColor];
_subLabel.font = [UIFont systemFontOfSize:16];
}
return _subLabel;
}
//时间
- (UILabel *)timeLabel{
if (!_timeLabel) {
_timeLabel = [[UILabel alloc]initWithFrame:CGRectMake(320, 25, 80, 30)];
_timeLabel.textColor = [UIColor lightGrayColor];
_timeLabel.font = [UIFont systemFontOfSize:18.];
}
return _timeLabel;
}
//重写初始化
- (instancetype)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier
{
if (self=[super initWithStyle:style reuseIdentifier:reuseIdentifier]) {
[self addSubview:self.headerImg];
[self addSubview:self.titleLabel];
[self addSubview:self.subLabel];
[self addSubview:self.timeLabel];
}
return self;
}
@end
#import "ViewController.h"#import "MyTableViewCell.h"@interface ViewController (){
NSArray *array;
NSDictionary *Dic;
UITableView *table;
UIView *headerView;
UIImageView *image;
}
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
headerView = [[UIView alloc]initWithFrame:CGRectMake(0, 0, [[UIScreen mainScreen] bounds].size.width, 200)];
UIImage *img = [UIImage imageNamed:@"hearder"];
image = [[UIImageView alloc]initWithFrame:CGRectMake(([[UIScreen mainScreen] bounds].size.width / 2) - 40 , 0, self.view.frame.size.width, 100)];
image.image = img;
[headerView addSubview:image];
table=[[UITableView alloc]initWithFrame:self.view.frame style:UITableViewStylePlain];
table.showsVerticalScrollIndicator = NO;
table.rowHeight=80;
table.delegate=self;
table.dataSource=self;
table.tableHeaderView = headerView;
[self.view addSubview:table];
NSString *path=[[NSBundle mainBundle]pathForResource:@"cell.plist" ofType:nil];
//获取所有数据源
Dic=[NSDictionary dictionaryWithContentsOfFile:path];
//获取所有的key
array=[Dic allKeys];
}
- (void)scrollViewDidScroll:(UIScrollView *)scrollView{
CGFloat Yset = table.contentOffset.y;
//向上偏移量变正 向下偏移量变负
if (Yset < -64) {
CGFloat factor = ABS(Yset)+200-64;
CGRect s = CGRectMake(- ([[UIScreen mainScreen] bounds].size.width*factor / 200 -[[UIScreen mainScreen] bounds].size.width) / 2,- ABS(Yset) + 64, [[UIScreen mainScreen] bounds].size.width * factor / 200, factor);
image.frame = s;
}else {
CGRect hvF = headerView.frame;
hvF.origin.y = 0;
headerView.frame = hvF;
image.frame = CGRectMake(0, hvF.origin.y, [[UIScreen mainScreen] bounds].size.width, 200);
}
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
return array.count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
static NSString *ID=@"cell";
MyTableViewCell *cell=[tableView dequeueReusableCellWithIdentifier:ID];
if (!cell) {
cell=[[MyTableViewCell alloc]initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:ID];
}
//获得该商品对用的数组信息
NSArray *dataArr=[Dic objectForKey:[array objectAtIndex:indexPath.row]];
cell.headerImg.image=[UIImage imageNamed:[dataArr objectAtIndex:0]];
cell.titleLabel.text=[array objectAtIndex:indexPath.row];
cell.subLabel.text=dataArr[1];
cell.timeLabel.text=dataArr[2];
cell.accessoryType=UITableViewCellAccessoryDisclosureIndicator;
return cell；
}
@end
