IOS 之纯代码计算cell的搞定（文字+图片）
1.自从换了工作之后，好久都没有碰自己的博客园了，今天刚好学到这个知识点就想起来写点东西了呀，tableview的使用在我们的应用的十分广泛，我特地的学习了下纯代码计算的cell的高度，在计算的中遇到了几个问题，但是还解决了，我直接上代码啦！！使用的是mvc的框架来实现的高度的计算,这里是自己的写的数据，不是接口的数据。用来测试了！！
2.项目中包括下面几个类：（model，Frame, tableviewcell , controller）这四个类 ：（纯代码计算高Demo来说明下）
3.Model类(Home)
Home.h的代码:
@property (nonatomic,assign)CGFloat cellHeight;
@property (nonatomic,strong)NSString *iconImageview;
@property (nonatomic,strong)NSString *name;
@property (nonatomic,strong)NSString *time;
@property (nonatomic,strong)NSString *content;
@property (nonatomic,strong)NSString *imagePath;
-(instancetype)initWithUser:(NSString *)iconImage name:(NSString *)name time:(NSString *)time content:(NSString *)content imagepath:(NSString *)imagePath;
-(instancetype)initWithUser:(NSString *)iconImage name:(NSString *)name tiem:(NSString *)time content:(NSString *)content;
Home.m的代码:
-(instancetype)initWithUser:(NSString *)iconImage name:(NSString *)name time:(NSString *)time content:(NSString *)content imagepath:(NSString *)imagePath{
self = [super init];
if (self) {
self.iconImageview = iconImage;
self.name = name;
self.time = time;
self.content = content;
self.imagePath = imagePath;
}
return self;
}
-(instancetype)initWithUser:(NSString *)iconImage name:(NSString *)name tiem:(NSString *)time content:(NSString *)content{
self = [super init];
if (self) {
self.iconImageview = iconImage;
self.name = name;
self.time = time;
self.content = content;
}
return self;
}
4.Frame类:(HomeFrame)在这里frame里面得到cellHeight 的高度
HomeFrame.h
@class Home;
@interface HomeFrame : NSObject
@property (nonatomic,strong)Home *home;
@property (nonatomic,assign)CGFloat cellHeight;
@property (nonatomic,assign)CGRect iconFrame;
@property (nonatomic,assign)CGRect nameFrame;
@property (nonatomic,assign)CGRect tiemFreme;
@property (nonatomic,assign)CGRect contentFrame;
@property (nonatomic,assign)CGRect pictureFrame;
HomeFrame.m
#define SCREENW [UIScreen mainScreen].bounds.size.width
#import "HomeFrame.h"
#import "Home.h"
@implementation HomeFrame
-(void)setHome:(Home *)home{
_home = home;
// cell的宽度
//计算iconframe
CGFloat iconX = 10;
CGFloat iconY = 10;
CGFloat iconW = 40;
CGFloat iconH = 40;
_iconFrame = CGRectMake(iconX, iconY, iconW, iconH);
//nameFrme
CGSize maxSize = CGSizeMake(SCREENW-10, MAXFLOAT);
CGSize nameSize = [home.name boundingRectWithSize:maxSize options:NSStringDrawingUsesLineFragmentOrigin attributes:@{NSFontAttributeName :[UIFont systemFontOfSize:14]} context:nil].size;
CGFloat nameX = CGRectGetMaxX(_iconFrame) + 10;
CGFloat nameY = iconY + (iconH-nameSize.height)/2;
_nameFrame = (CGRect){{nameX,nameY},nameSize};
//timeFrame
CGSize timeSize = [home.time boundingRectWithSize:maxSize options:NSStringDrawingUsesLineFragmentOrigin attributes:@{NSFontAttributeName :[UIFont systemFontOfSize:14]} context:nil].size;
CGFloat timeX = CGRectGetMaxX(_nameFrame)+20;
CGFloat timeY = iconY +(iconH - timeSize.height)/2;
_tiemFreme = (CGRect){{timeX,timeY},timeSize};
//contentFrame
// 设置内容
CGSize textSize = [home.content boundingRectWithSize:(CGSize){SCREENW-10,MAXFLOAT} options:NSStringDrawingUsesLineFragmentOrigin attributes:@{NSFontAttributeName:[UIFont systemFontOfSize:14]} context:nil].size;
CGFloat textX = 5;
CGFloat textY = CGRectGetMaxY(_tiemFreme)+10;
_contentFrame = (CGRect){{textX,textY},textSize};
//图片的存在的问题
if (home.imagePath.length == 0) {
self.cellHeight = CGRectGetMaxY(_contentFrame)+10;
return;
}else{
CGFloat imageW = 100;
CGFloat imageH = 100;
CGFloat imageX = 10;
CGFloat imageY = CGRectGetMaxY(_contentFrame)+10;
self.pictureFrame = CGRectMake(imageX, imageY, imageW, imageH);
self.cellHeight = CGRectGetMaxY(_pictureFrame)+10;
}
}
5.TableviewCell类(TableviewCell)
TableviewCell.h
@class HomeFrame;
@interface TableViewCell : UITableViewCell
@property (nonatomic,strong)HomeFrame *homeFrame;
+(id)cellWithTable:(UITableView *)tableview;
TableviewCell.m
#import "TableViewCell.h"
#import "Home.h"
#import "HomeFrame.h"
@interface TableViewCell()
@property (nonatomic,strong)UIImageView *iconImageView;
@property (nonatomic,strong)UILabel *nameLabel;
@property (nonatomic,strong)UILabel *timeLabel;
@property (nonatomic,strong)UILabel *contentLabel;
@property (nonatomic,strong)UIImageView *myImageView;
@property (nonatomic,strong)Home *home;
@end
@implementation TableViewCell
- (instancetype)initWithTableView:(UITableView *)tableView
{
TableViewCell *cell = [TableViewCell cellWithTable:tableView];
return cell;
}
-(instancetype)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier{
self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];
if (self) {
[self setupCell];
}
return self;
}
+(id)cellWithTable:(UITableView *)tableview{
static NSString *CellID = @"CELL";
TableViewCell *cell = [tableview dequeueReusableCellWithIdentifier:CellID];
if (cell == nil) {
cell = [[TableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellID];
}
return cell;
}
-(void)setupCell{
//icon
UIImageView *iconImagview = [[UIImageView alloc]init];
iconImagview.contentMode =UIViewContentModeScaleAspectFill;
self.iconImageView = iconImagview;
[self.contentView addSubview:iconImagview];
//name
UILabel *nameLabel = [[UILabel alloc]init];
nameLabel.font = [UIFont systemFontOfSize:14];
self.nameLabel = nameLabel;
[self addSubview:nameLabel];
//time
UILabel *timelabel = [[UILabel alloc]init];
timelabel.font = [UIFont systemFontOfSize:14];
self.timeLabel = timelabel;
[self.contentView addSubview:timelabel];
//content
//name
UILabel *contentlabel = [[UILabel alloc]init];
contentlabel.font = [UIFont systemFontOfSize:14];
contentlabel.numberOfLines = 0;
self.contentLabel = contentlabel;
[self.contentView addSubview:contentlabel];
//picture
UIImageView *pictureImageview = [[UIImageView alloc]init];
pictureImageview.contentMode =UIViewContentModeScaleAspectFill;
self.myImageView = pictureImageview;
[self.contentView addSubview:pictureImageview];
}
-(void)setHomeFrame:(HomeFrame *)homeFrame{
_homeFrame = homeFrame;
//赋值
self.iconImageView.image = [UIImage imageNamed:homeFrame.home.iconImageview];
self.nameLabel.text = [NSString stringWithFormat:@"%@",homeFrame.home.name];
self.timeLabel.text = [NSString stringWithFormat:@"%@",homeFrame.home.time];
self.contentLabel.text = [NSString stringWithFormat:@"%@",homeFrame.home.content];
self.myImageView.image = [UIImage imageNamed:homeFrame.home.imagePath];
//设置frame
self.iconImageView.frame = homeFrame.iconFrame;
self.nameLabel.frame = homeFrame.nameFrame;
self.timeLabel.frame = homeFrame.tiemFreme;
self.contentLabel.frame = homeFrame.contentFrame;
self.myImageView.frame = homeFrame.pictureFrame;
}
7.Controller类:(HomeController)
这里就不写代码了，这里就是用到用tableview实现cell的实现基础的东西，但是里面有个重要的东西，模型开发中的那个数据是通过HomeFrame里面得到的Home这里个模型，要注意这一点，这个很容易犯错的大家注意了！！！
Demo下载地址：http://pan.baidu.com/s/1o89wTlS
