技术iOS分享的demo产品说

巧用TableFooterView设计和实现界面

2015-11-09  本文已影响20467人  Tuberose


一

static NSString * const CYMeCellId = @"me";

[self.tableView registerClass:[CYMeCell class] forCellReuseIdentifier:CYMeCellId];

    self.tableView.sectionHeaderHeight = 0;
    self.tableView.sectionFooterHeight = CYCommonMargin;
    // 设置内边距(-25代表：所有内容往上移动25)
    self.tableView.contentInset = UIEdgeInsetsMake(CYCommonMargin - 35, 0, 0, 0);

二

- (instancetype)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier
{
    if (self = [super initWithStyle:style reuseIdentifier:reuseIdentifier]) {
        self.accessoryType = UITableViewCellAccessoryDisclosureIndicator;
        self.textLabel.textColor = [UIColor darkGrayColor];

        // 设置背景图片-图片可以设置拉伸
        self.backgroundView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"mainCellBackground"]];
    }
    return self;
}

- (void)layoutSubviews
{
    [super layoutSubviews];

    if (self.imageView.image == nil) return;

    // 调整imageView
    self.imageView.y = CYCommonMargin * 0.5;
    self.imageView.height = self.contentView.height - 2 * self.imageView.y;
    self.imageView.width = self.imageView.height;

    // 调整Label
    //    self.textLabel.x = self.imageView.x + self.imageView.width + CYCommonMargin;
    self.textLabel.x = CGRectGetMaxX(self.imageView.frame) + CYCommonMargin;

    // CGRectGetMaxX(self.imageView.frame) == self.imageView.x + self.imageView.width
    // CGRectGetMinX(self.imageView.frame) == self.imageView.x
    // CGRectGetMidX(self.imageView.frame) == self.imageView.x + self.imageView.width * 0.5
    // CGRectGetMidX(self.imageView.frame) == self.imageView.centerX
}


#pragma mark - 数据源方法
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
    return 2;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    return 1;
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    CYMeCell *cell = [tableView dequeueReusableCellWithIdentifier:CYMeCellId];

    if (indexPath.section == 0) {
        cell.textLabel.text = @"登录/注册";
        cell.imageView.image = [UIImage imageNamed:@"setup-head-default"];
    }else{

        cell.textLabel.text = @"离线下载";
    }

    return cell;
}

三

#define CYWriteToPlist(data, filename) [data writeToFile:[NSString stringWithFormat:@"/Users/gecongying/Desktop/%@.plist", filename] atomically:YES];


#import <Foundation/Foundation.h>

@interface CYSquare : NSObject
/** 名字 */
@property (nonatomic, copy) NSString *name;
/** 图标 */
@property (nonatomic, copy) NSString *icon;
/** 链接 */
@property (nonatomic, copy) NSString *url;

@end

self.tableView.tableFooterView = [[CYMeFooter alloc] init];

#import "CYMeFooter.h"
#import <AFNetworking.h>
#import "CYSquare.h"
#import <MJExtension.h>
//#import <UIImageView+WebCache.h>
#import <UIButton+WebCache.h>

@implementation CYMeFooter

- (instancetype)initWithFrame:(CGRect)frame
{
    if (self = [super initWithFrame:frame]) {
        self.backgroundColor = [UIColor redColor];

        // 请求参数
        NSMutableDictionary *params = [NSMutableDictionary dictionary];
        params[@"a"] = @"square";
        params[@"c"] = @"topic";

        // 发送请求
        CYWeakSelf;
        [[AFHTTPSessionManager manager] GET:CYRequestURL parameters:params success:^(NSURLSessionDataTask *task, id responseObject) {
//            CYWriteToPlist(responseObject, @"square");
            [weakSelf createSquares:[CYSquare objectArrayWithKeyValuesArray:responseObject[@"square_list"]]];
        } failure:^(NSURLSessionDataTask *task, NSError *error) {

        }];
    }
    return self;
}

/**
 * 创建方块
 */
- (void)createSquares:(NSArray *)squares
{
    // 每行的列数
    int colsCount = 4;

    // 按钮尺寸
    CGFloat buttonW = self.width / colsCount;
    CGFloat buttonH = buttonW;

    // 遍历所有的模型
    NSUInteger count = squares.count;
    for (NSUInteger i = 0; i < count; i++) {
        CYSquare *square = squares[i];

        // 创建按钮
        UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
        [button addTarget:self action:@selector(buttonClick:) forControlEvents:UIControlEventTouchUpInside];
        [self addSubview:button];

        // frame
        CGFloat buttonX = (i % colsCount) * buttonW;
        CGFloat buttonY = (i / colsCount) * buttonH;
        button.frame = CGRectMake(buttonX, buttonY, buttonW, buttonH);

        // 数据
        [button setTitle:square.name forState:UIControlStateNormal];


    // 2.如果导入的是#import <UIButton+WebCache.h>
        // 设置按钮的image
        [button sd_setImageWithURL:[NSURL URLWithString:square.icon] forState:UIControlStateNormal];


    // 1.如果导入的是#import <UIImageView+WebCache.h>
        // 正确做法
//       [[SDWebImageManager sharedManager] downloadImageWithURL:[NSURL URLWithString:square.icon] options:0 progress:nil completed:^(UIImage *image, NSError *error, SDImageCacheType cacheType, BOOL finished, NSURL *imageURL) {
//        [button setImage:image forState:UIControlStateNormal];
       // 错误示范
    //        [button.imageView sd_setImageWithURL:[NSURL URLWithString:square.icon]];
//                }];
    }
}

- (void)buttonClick:(CYSquareButton *)button
{
    CYLogFunc;

}

四

#import "CYSquareButton.h"

@implementation CYSquareButton

- (instancetype)initWithFrame:(CGRect)frame
{
    if (self = [super initWithFrame:frame]) {
        self.titleLabel.textAlignment = NSTextAlignmentCenter;
        self.titleLabel.font = [UIFont systemFontOfSize:14];
        [self setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
    }
    return self;
}

- (void)layoutSubviews
{
    [super layoutSubviews];

    self.imageView.width = self.width * 0.5;
    self.imageView.height = self.imageView.width;
    self.imageView.y = self.height * 0.1;
    self.imageView.centerX = self.width * 0.5;

    self.titleLabel.width = self.width;
    self.titleLabel.y = CGRectGetMaxY(self.imageView.frame);
    self.titleLabel.x = 0;
    self.titleLabel.height = self.height - self.titleLabel.y;
}

@end

五

六

// 设置footer的高度
    self.height = CGRectGetMaxY(button.frame);
            // 重新设置footerView
    UITableView *tableView = (UITableView *)self.superview;
    tableView.tableFooterView = self;

// 重新设置footerView
    UITableView *tableView = (UITableView *)self.superview;
//    tableView.tableFooterView = self;
    tableView.contentSize = CGSizeMake(0, CGRectGetMaxY(self.frame))

    // 设置footer的高度
    NSUInteger rowsCount = count / colsCount;
    if (count % colsCount) { // 不能整除，行数+1
        rowsCount++;
    self.height = rowsCount * buttonH;

    // 重新设置footerView
    UITableView *tableView = (UITableView *)self.superview;
    //    tableView.tableFooterView = self;
    tableView.contentSize = CGSizeMake(0, CGRectGetMaxY(self.frame));
    }

    // 设置footer的高度
     NSUInteger rowsCount = (count + colsCount - 1) / colsCount;
    self.height = rowsCount * buttonH;

    // 重新设置footerView
    UITableView *tableView = (UITableView *)self.superview;
    //    tableView.tableFooterView = self;
    tableView.contentSize = CGSizeMake(0, CGRectGetMaxY(self.frame));

     总页数 == (总个数 + 每页的个数 - 1) / 每页的个数

     总个数：97
     每页的个数：17
     总页数 =  (97 + 17 - 1) / 17

七

button.frame = CGRectMake(buttonX, buttonY, buttonW-1, buttonH-1);

[self setBackgroundImage:[UIImage imageNamed:@"mainCellBackground"] forState:UIControlStateNormal];

八

#import <UIKit/UIKit.h>

@class CYSquare;

@interface CYSquareButton : UIButton
/** 方块模型 */
@property (nonatomic, strong) CYSquare *square;
@end


- (void)setSquare:(CYSquare *)square
{
    _square = square;

    // 数据
    [self setTitle:square.name forState:UIControlStateNormal];
    // 设置按钮的image
    [self sd_setImageWithURL:[NSURL URLWithString:square.icon] forState:UIControlStateNormal];
}

// 1.创建按钮
// 2.设置按钮frame
// 3.设置模型数据(拿到模型，把模型数据拆分给子控件)
button.square = squares[i];

九

- (void)buttonClick:(CYSquareButton *)button
{
    // 拿到以http开头的URL
    if ([button.square.url hasPrefix:@"http"] == NO) return;
    CYWebViewController *webVc = [[CYWebViewController alloc] init];
    webVc.square = button.square;

    // 取出当前选中的导航控制器
    UITabBarController *rootVc = (UITabBarController *)self.window.rootViewController;
    UINavigationController *nav = (UINavigationController *)rootVc.selectedViewController;
    [nav pushViewController:webVc animated:YES];

}

十

#import <UIKit/UIKit.h>

@class CYSquare;

@interface CYWebViewController : UIViewController
/** 方块 */
@property (nonatomic, strong) CYSquare *square;
@end

#import "CYWebViewController.h"
#import "CYSquare.h"

@interface CYWebViewController () <UIWebViewDelegate>
@property (weak, nonatomic) IBOutlet UIWebView *webView;
@property (weak, nonatomic) IBOutlet UIBarButtonItem *backItem;
@property (weak, nonatomic) IBOutlet UIBarButtonItem *forwardItem;
@end

@implementation CYWebViewController

- (void)viewDidLoad {
    [super viewDidLoad];

    self.title = self.square.name;
    [self.webView loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:self.square.url]]];

    self.webView.backgroundColor = CYCommonBgColor;
    // 为了让webView的内容能完整显示，我们可以设置它的contentInset向下挪64
    // 但是webView是继承于UIView的，是无法设置它的contentInset的。但是它能滚动，是因为它里面镶嵌了一个ScrollView的属性
    // NS_CLASS_AVAILABLE_IOS(2_0) __TVOS_PROHIBITED @interface UIWebView : UIView <NSCoding, UIScrollViewDelegate>
    self.webView.scrollView.contentInset = UIEdgeInsetsMake(64, 0, 0, 0);
}

- (IBAction)back {
    [self.webView goBack];
}

- (IBAction)forward {
    [self.webView goForward];
}

- (IBAction)refresh {
    [self.webView reload];
}

#pragma mark - <UIWebViewDelegate>
- (void)webViewDidFinishLoad:(UIWebView *)webView
{
    self.backItem.enabled = webView.canGoBack;
    self.forwardItem.enabled = webView.canGoForward;
}
@end

#pragma mark - <UIWebViewDelegate>
- (void)webViewDidFinishLoad:(UIWebView *)webView
{
    self.backItem.enabled = webView.canGoBack;
    self.forwardItem.enabled = webView.canGoForward;
}

https://github.com/Tuberose621/-TableFooterView-
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