TableView与TableViewCell

TableViewCell

TableViewCell是现实表格的单元格式
基本流程为在init中添加各种可用控件，再编写输入数据的方法，并且依据各数据来设定各控件的位置以及行高

#import "TableViewCell.h"#import "Weibo.h"#define NJNameFont [UIFont systemFontOfSize:15]#define NJTextFont [UIFont systemFontOfSize:16]@implementation TableViewCell+ (instancetype) cellWithTableView:(UITableView *) tableView;{    static NSString *identifier = @"status";    //缓存中取    TableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:identifier];    //创建    if(cell == nil)    {        cell = [[TableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:identifier];    }    return cell;}- (id) initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier{    self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];    if(self)    {        //自定义各种控件        //定义头像控件        UIImageView *iconView = [[UIImageView alloc] init];        [self.contentView addSubview:iconView];        self.iconView = iconView;        //自定义昵称        UILabel *nameLabel = [[UILabel alloc] init];        [self.contentView addSubview:nameLabel];        self.nameLabel = nameLabel;        //创建vip        UIImageView *vipView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"VIP_32px_534386_easyicon.net.png"]];        [self.contentView addSubview: vipView];        self.vipView = vipView;        //创建正文        UILabel *introLabel = [[UILabel alloc] init];        introLabel.numberOfLines = 0;        [self.contentView addSubview:introLabel];        self.introLabel = introLabel;        //创建配图        UIImageView *pictureView = [[UIImageView alloc] init];        [self.contentView addSubview:pictureView];        self.pictureView = pictureView;    }    return self;}- (void) settingData:(Weibo*) lyzWeibo{    //设置头像图片    CGFloat padding = 10;    self.iconView.image = [UIImage imageNamed:lyzWeibo.icon];    CGRect iconF = CGRectMake(10, 10, 30, 30);    self.iconView.frame = iconF;    //设置微博名    self.nameLabel.text = lyzWeibo.name;    self.nameLabel.font = NJNameFont;    CGFloat nameLabelX = CGRectGetMaxX(iconF) + padding;    CGSize nameSize = [self sizeWithString:lyzWeibo.name font:NJNameFont maxSize:CGSizeMake(MAXFLOAT, MAXFLOAT)];    CGFloat nameLabelY = 10 + (30 - nameSize.height) * 0.5;    CGRect nameF = CGRectMake(nameLabelX, nameLabelY, nameSize.width, nameSize.height);    self.nameLabel.frame = nameF;    //设置vip    if(lyzWeibo.vip)    {        self.vipView.hidden = NO;        self.nameLabel.textColor = [UIColor redColor];        CGFloat vipVIewX = CGRectGetMaxX(nameF) + padding;        CGFloat vipViewY = nameLabelY;        self.vipView.frame = CGRectMake(vipVIewX, vipViewY, 14, 14);    }else    {        self.vipView.hidden = YES;    }    self.cellHeight = CGRectGetMaxY(iconF) + padding;    //设置正文，if的条件为参数存在且不为空    if(lyzWeibo.text && (![lyzWeibo.text isEqual: @""]))    {        self.introLabel.text = lyzWeibo.text;        self.introLabel.font = NJTextFont;        CGFloat introLabelX = 10;        CGFloat introLabelY = CGRectGetMaxY(iconF) + padding;        CGSize introSize = [self sizeWithString:lyzWeibo.text font:NJTextFont maxSize:CGSizeMake(MAXFLOAT,MAXFLOAT)];        CGRect introF = CGRectMake(introLabelX, introLabelY, introSize.width, introSize.height);        self.introLabel.frame = introF;        self.cellHeight = CGRectGetMaxY(self.introLabel.frame) + padding;    }else    {        self.introLabel.hidden = YES;    }    //设置配图    if(lyzWeibo.picture && (![lyzWeibo.picture isEqual: @""]))    {        self.pictureView.image = [UIImage imageNamed:lyzWeibo.picture];        if(lyzWeibo.text && (![lyzWeibo.text isEqual: @""]))        {            CGFloat pictureX = 10;            CGFloat pictureY = CGRectGetMaxY(self.introLabel.frame) + padding;            self.pictureView.frame = CGRectMake(pictureX, pictureY, 100, 100);        }else        {            CGFloat pictureX = 10;            CGFloat pictureY = CGRectGetMaxY(iconF) + padding;            self.pictureView.frame = CGRectMake(pictureX, pictureY, 100, 100);        }        self.cellHeight = CGRectGetMaxY(self.pictureView.frame) + padding;    }else    {        self.pictureView.hidden = YES;    }}- (CGSize) sizeWithString:(NSString *)str font:(UIFont *)font maxSize:(CGSize)maxSize{    NSDictionary *dict = @{NSFontAttributeName:font};    CGSize size = [str boundingRectWithSize:maxSize options:NSStringDrawingUsesLineFragmentOrigin attributes:dict context:nil].size;    return size;}@end

TableView

在 - (UITableViewCell )tableView:(UITableView )tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath 方法中利用TableViewCell的settingData方法来设定TableViewCell并返回，另外需要注意的就是设置行高以及行数，至于数据结构，可另写class，亦可在本Controller中添加@property来获取文件内容进行设置

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {    NSInteger rowNo = indexPath.row;    TableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"reuseIdentifier"];    cell = [[TableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"reuseIdentifier"];    [cell settingData:[self.statusFrames objectAtIndex:rowNo]];    // Configure the cell...    return cell;}- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{    NSInteger rowNo = indexPath.row;    TableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"reuseIdentifier"];    cell = [[TableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"reuseIdentifier"];    [cell settingData:[self.statusFrames objectAtIndex:rowNo]];    return cell.cellHeight;}//statusFrames为数据属性，通过文件获取数据- (NSArray *) statusFrames{    if(_statusFrames == nil)    {        NSString * fullPath = [[NSBundle mainBundle] pathForResource:@"statuses.plist" ofType:nil];        NSArray *dictArray = [NSArray arrayWithContentsOfFile:fullPath];        NSMutableArray *models = [NSMutableArray arrayWithCapacity:dictArray.count];        for(NSDictionary *dict in dictArray)        {            Weibo *weibo01 = [Weibo weiboWithDict:dict];            [models addObject:weibo01];        }        self.statusFrames = [models copy];    }    return _statusFrames;}