iOS图片下拉放大+读取plist数据

我们在这实现一个类似于朋友圈的一种图片下拉刷新的功能,在实现此功能前我们需要借助一个第三方文件 stretchTableHeader
将它导入我们的工程中并且导入两张图片方便后续使用, 接下来就书写我们的代码

首先我们要创建一个plist文件,可根据兴趣自行书写内容

屏幕快照 2017-09-11 上午7.40.32.png

接着 我们创建一个继承于 UITableViewCell 的文件

在.h文件中声明属性

@property(nonatomic,strong)UILabel *lab1,*lab2;
@property(nonatomic,strong)UIImageView *img1,*img2;

在.m文件中实现具体的代码,此处坐标需要自行调整;

-(instancetype)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier
{
    if (self = [super initWithStyle:style reuseIdentifier:reuseIdentifier])
    {
        [self addSubview:self.theL1];
        [self addSubview:self.theL2];
        [self addSubview:self.theImage];
    }
    return self;
}
- (UILabel *)lab1{
    if (!_lab1) {
        _lab1 = [[UILabel alloc]initWithFrame:CGRectMake(60, 22, 200, 12)];
        [self addSubview:_lab1];
    }
    return _lab1;
}
- (UILabel *)lab2{
    if (!_lab2) {
        _lab2 = [[UILabel alloc]initWithFrame:CGRectMake(10, 72, 400, 24)];
        [self addSubview:_lab2];
    }
    return _lab2;
}
- (UIImageView *)img1{
    if (!_img1) {
        _img1 = [[UIImageView alloc]initWithFrame:CGRectMake(10, 10, 40, 40)];
        [_img1.layer setCornerRadius:40/2];
        _img1.layer.masksToBounds = YES ;
        [self addSubview:_img1];
    }
    return _img1;
}
- (UIImageView *)img2{
    if (!_img2) {
        _img2 = [[UIImageView alloc]initWithFrame:CGRectMake(100, 112, 200, 80)];
        [self addSubview:_img2];
    }
    return _img2;
}

回到ViewController.m中继续书写

#import "ViewController.h"
#import "MyTableViewCell.h"
#import "HFStretchableTableHeaderView.h"
@interface ViewController ()<UITableViewDelegate,UITableViewDataSource>
{
    UITableView *_tableView;
    NSMutableArray *dataArr;

}
@property(nonatomic,strong)NSDictionary *dic;
@property (nonatomic,strong)HFStretchableTableHeaderView *stretchHeaderView;
#define StretchHeaderHeight 200

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    // 初始化表格
    _tableView = [[UITableView alloc]initWithFrame:CGRectMake(0, 0, [UIScreen mainScreen].bounds.size.width, [UIScreen mainScreen].bounds.size.height) style:UITableViewStylePlain];
    // 设置代理
    _tableView.delegate = self;
    _tableView.dataSource = self;
    // 添加到视图上
    [self.view addSubview:_tableView];
    
    [self initStretchHeader];
    
    NSString *plistPath = [[NSBundle mainBundle]pathForResource:@"friends" ofType:@"plist"];
    dataArr = [[NSMutableArray alloc]initWithContentsOfFile:plistPath];
    NSLog(@"%@",dataArr);//直接打印数据
    
}
- (void)initStretchHeader
{
    //背景
    UIImageView *bgImageView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, [UIScreen mainScreen].bounds.size.width, StretchHeaderHeight)];
    bgImageView.contentMode = UIViewContentModeScaleAspectFill;
    bgImageView.clipsToBounds = YES;
    bgImageView.image = [UIImage imageNamed:@"headerImage1.jpg"];
    
    //背景之上的内容
    UIView *contentView = [[UIView alloc] initWithFrame:bgImageView.bounds];
    contentView.backgroundColor = [UIColor clearColor];
    
        self.stretchHeaderView = [HFStretchableTableHeaderView new];
    [self.stretchHeaderView stretchHeaderForTableView:_tableView withView:bgImageView subViews:contentView];
    
}

#pragma -
#pragma mark - UITableViewDelegate表格的代理
-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
    return 200;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return dataArr.count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *identifier = @"cell";
    MyTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:identifier];
    if (!cell) {
        cell = [[MyTableViewCell alloc]initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:identifier];
    }
    NSDictionary *dic = dataArr[indexPath.row];
    [dic objectForKey:@"content"];
    NSLog(@"________%@",dic);
    cell.lab1.text = [dic objectForKey:@"nickname"];
    cell.lab2.text = [dic objectForKey:@"content"];
    cell.img1.image = [UIImage imageNamed:[dic objectForKey:@"headImg"]];
    cell.img2.image = [UIImage imageNamed:[dic objectForKey:@"headImg"]];
    if (indexPath.row == 0) {
        cell.img2.image = nil;
    }
    return cell;
}

#pragma mark - stretchableTable delegate

- (void)scrollViewDidScroll:(UIScrollView *)scrollView
{
    [self.stretchHeaderView scrollViewDidScroll:scrollView];
}

- (void)viewDidLayoutSubviews
{
    [self.stretchHeaderView resizeView];
}