iOS学习之UI自定义cell

@interface RootTableViewCell : UITableViewCell
// 联系人头像
@property (nonatomic, strong) UIImageView *headerImageView;
// 联系人姓名label
@property (nonatomic, strong) UILabel *nameLabel;
// 电话号码的label
@property (nonatomic, strong) UILabel *phoneLabel;
@end

@implementation RootTableViewCell
- (instancetype)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier
{
    self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];
    if (self) {
        // 初始化子视图
        [self initLayout];
    }
    return self;
}

- (void)initLayout
{
    // 1.头像
    self.headerImageView = [[UIImageView alloc] initWithFrame:CGRectMake(16, 10, 100, 100)];
//    self.headerImageView.backgroundColor = [UIColor orangeColor];
    self.headerImageView.layer.masksToBounds = YES;
    self.headerImageView.layer.cornerRadius = 50;
    // cell提供了一个contentView的属性，专门用来自定义cell,防止在cell布局的时候发生布局混乱，如果是自定义cell，记得将子控件添加到ContentView上
    [self.contentView addSubview:self.headerImageView];
    
    // 2.姓名
    self.nameLabel = [[UILabel alloc] initWithFrame:CGRectMake(CGRectGetMaxX(self.headerImageView.frame) + 10, CGRectGetMinY(self.headerImageView.frame), 100, 40)];
//    self.nameLabel.backgroundColor = [UIColor redColor];
    [self.contentView addSubview:self.nameLabel];
    
    // 3.电话号码
    self.phoneLabel = [[UILabel alloc] initWithFrame:CGRectMake(CGRectGetMinX(self.nameLabel.frame), CGRectGetMaxY(self.nameLabel.frame) + 20, 200, 40)];
//    self.phoneLabel.backgroundColor = [UIColor greenColor];
    [self.contentView addSubview:self.phoneLabel];
    
}

// 建立model存放数据
@interface Contact : NSObject
// 姓名
@property (nonatomic, copy) NSString *name;
// 手机号码
@property (nonatomic, copy) NSString *phoneNumber;
// 图片名
@property (nonatomic, copy) NSString *imageName;
@end

#import "RootTableViewController.h"
#import "Contact.h"
#import "RootTableViewCell.h"
@interface RootTableViewController ()
// 声明一个大数组存放所有联系人
@property (nonatomic, strong) NSMutableArray *allContactsArray;

@end

@implementation RootTableViewController
// 懒加载 （重写getter方法）
- (NSMutableArray *)allContactsArray
{
    if (_allContactsArray == nil) {
        _allContactsArray = [NSMutableArray array];
    }
    return _allContactsArray;
}

- (void)viewDidLoad {
    [super viewDidLoad];
    self.title = @"通讯录";
    self.navigationController.navigationBar.barTintColor = [UIColor lightGrayColor];
    [self handleData];

}

- (void)handleData
{
    // 读取plist文件
    NSMutableArray *array =[NSMutableArray arrayWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"Contacts" ofType:@"plist"]];
    // 将要显示的数据转为model对象
    for (NSDictionary *contactDict in array) {
        Contact *contact = [[Contact alloc] init];
        // 使用KVC赋值
        [contact setValuesForKeysWithDictionary:contactDict];
        // 将联系人model存放在大数组中
        [self.allContactsArray addObject:contact];
    }
    
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    
}

#pragma mark - Table view data source

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {

    return self.allContactsArray.count;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {

    return 1;
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    // 创建常量标识符
    static NSString *identifier = @"cell";
    // 从重用队列里查找可重用的cell
    RootTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:identifier];
    // 判断如果没有可以重用的cell，创建
    if (!cell) {
        cell = [[RootTableViewCell alloc] initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:identifier];
    }
    // 设置数据
    // 取出model对象
    Contact *contact = self.allContactsArray[indexPath.section];
    cell.headerImageView.image = [UIImage imageNamed:contact.imageName];
    cell.nameLabel.text = contact.name;
    cell.phoneLabel.text = contact.phoneNumber;
    cell.selectionStyle = UITableViewCellSelectionStyleNone;
    return cell;
}

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
    return 120;
    
}

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
    [tableView deselectRowAtIndexPath:indexPath animated:YES];
    
}

@end

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
    static NSString *identifier1 = @"labelCell";
    static NSString *identifier2 = @"imageCell";
    Person *person = self.allPersonsArray[indexPath.row];
    if ([person.type isEqualToString:@"1"]) {
        LableCell *cell = [tableView dequeueReusableCellWithIdentifier:identifier1 forIndexPath:indexPath];
        cell.nameLabel.text = person.name;
        cell.statusLabel.text = person.status;
        return cell;
        
    }else {
        ImageViewCell *cell = [tableView dequeueReusableCellWithIdentifier:identifier2 forIndexPath:indexPath];
        cell.nameLabel.text = person.name;
        cell.statusLabel.text = person.status;
        cell.myImageView.image = [UIImage imageNamed:person.imageName];
        return cell;
    }
    
}

@interface CalculateTextHeight : NSObject

// 声明类方法用来计算文本高度
+ (CGFloat)calculateTextHeightWithText:(NSString *)text
                                  font:(UIFont *)font;

+ (CGFloat)imageHeightWithImage:(UIImage *)image;

@end

@implementation CalculateTextHeight
+ (CGFloat)calculateTextHeightWithText:(NSString *)text font:(UIFont *)font
{
    // iOS7.0中求文本高度的方法，返回一个CGRect的高度
    
    // 第一个参数,一个屏幕宽，10000高的文本
    CGSize size = CGSizeMake([UIScreen mainScreen].bounds.size.width, 10000);
    // 第二个参数，设置以行高为单
    // 第三个参数，根据字体判断高度
    CGRect rect = [text boundingRectWithSize:size options:NSStringDrawingUsesLineFragmentOrigin attributes:@{NSFontAttributeName : font} context:nil];
    
    return rect.size.height;
    
}


+ (CGFloat)imageHeightWithImage:(UIImage *)image
{
    // 得到图片的宽和高
    CGFloat width = image.size.width;
    CGFloat height = image.size.height;
    // 得到宽高比例和屏幕宽度
    float i = height / width;
    float j = [UIScreen mainScreen].bounds.size.width;
    CGFloat x = i * j;
    return x;
}

@end

+ (CGFloat)imageHeightWithImage:(UIImage *)image
{
    // 得到图片的宽和高
    CGFloat width = image.size.width;
    CGFloat height = image.size.height;
    // 得到宽高比例和屏幕宽度
    // 屏幕的宽高比例用CGFloat接收
    CGFloat i = height / width;
    CGFloat j = [UIScreen mainScreen].bounds.size.width;
    CGFloat x = i * j;
    return x;
//    或者直接返回
//    return height / width *[UIScreen mainScreen].bounds.size.width;
}