用Model来计算cell的高度
效果：
将计算cell高度的方法直接移植到Model当中，初始化的瞬间就计算好了高度，非常好用！
源码：
Model
//
// Model.h
//
// Copyright (c) 2014年 Y.X. All rights reserved.
//
#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>
@interface Model : NSObject
@property (nonatomic, strong) NSString *info;
@property (nonatomic, strong) NSString *subInfo;
@property (nonatomic, strong) NSString *details;
@property (nonatomic, assign) CGFloat infoHeight;
@property (nonatomic, assign) CGFloat subInfoHeight;
@property (nonatomic, assign) CGFloat detailsHeight;
@property (nonatomic, assign) CGFloat totalHeight;
- (void)setValue:(id)value forUndefinedKey:(NSString *)key;
- (instancetype)initWithDictionary:(NSDictionary *)dictionary;
@end//
// Model.m
//
// Copyright (c) 2014年 Y.X. All rights reserved.
//
#import "Model.h"
@implementation Model
- (void)setValue:(id)value forUndefinedKey:(NSString *)key {
}
- (void)setValue:(id)value forKey:(NSString *)key {
if ([value isKindOfClass:[NSNull class]]) {
return;
}
[super setValue:value forKey:key];
}
- (instancetype)initWithDictionary:(NSDictionary *)dictionary {
self = [super init];
if (self) {
if ([dictionary isKindOfClass:[NSDictionary class]]) {
[self setValuesForKeysWithDictionary:dictionary];
}
}
self.infoHeight = [Model heightWithString:self.info LabelFont:[UIFont boldSystemFontOfSize:18.f] withLabelWidth:300];
self.subInfoHeight = [Model heightWithString:self.subInfo LabelFont:[UIFont systemFontOfSize:14.f] withLabelWidth:300];
self.detailsHeight = [Model heightWithString:self.details LabelFont:[UIFont italicSystemFontOfSize:16.f] withLabelWidth:300];
self.totalHeight = self.infoHeight + self.subInfoHeight + self.detailsHeight;
return self;
}
#pragma mark - 计算文本高度
+ (CGFloat)heightWithString:(NSString *)string LabelFont:(UIFont *)font withLabelWidth:(CGFloat)width {
CGFloat height = 0;
if (string.length == 0) {
height = 0;
} else {
// 字体
NSDictionary *attribute = @{NSFontAttributeName: [UIFont systemFontOfSize:18.f]};
if (font) {
attribute = @{NSFontAttributeName: font};
}
// 尺寸
CGSize retSize = [string boundingRectWithSize:CGSizeMake(width, MAXFLOAT)
options:
NSStringDrawingTruncatesLastVisibleLine |
NSStringDrawingUsesLineFragmentOrigin |
NSStringDrawingUsesFontLeading
attributes:attribute
context:nil].size;
height = retSize.height;
}
return height;
}
@endModelCell
//
// ModelCell.h
// HeightModel
//
// Created by YouXianMing on 15/1/10.
// Copyright (c) 2015年 YouXianMing. All rights reserved.
//
#import <UIKit/UIKit.h>
@interface ModelCell : UITableViewCell
@property (nonatomic, strong) UILabel *info;
@property (nonatomic, strong) UILabel *subInfo;
@property (nonatomic, strong) UILabel *details;
- (void)accessData:(id)model;
@end//
// ModelCell.m
// HeightModel
//
// Created by YouXianMing on 15/1/10.
// Copyright (c) 2015年 YouXianMing. All rights reserved.
//
#import "ModelCell.h"
#import "Model.h"
#import "UIView+SetRect.h"
@implementation ModelCell
- (instancetype)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier {
if (self = [super initWithStyle:style reuseIdentifier:reuseIdentifier]) {
_info = [[UILabel alloc] initWithFrame:CGRectMake(10, 10, 300, 20)];
_info.numberOfLines = 0;
_info.font = [UIFont boldSystemFontOfSize:18.f];
_info.textColor = [UIColor blackColor];
[self addSubview:_info];
_subInfo = [[UILabel alloc] initWithFrame:CGRectMake(10, 10, 300, 20)];
_subInfo.numberOfLines = 0;
_subInfo.font = [UIFont systemFontOfSize:14.f];
_subInfo.textColor = [UIColor grayColor];
[self addSubview:_subInfo];
_details = [[UILabel alloc] initWithFrame:CGRectMake(10, 10, 300, 20)];
_details.numberOfLines = 0;
_details.font = [UIFont italicSystemFontOfSize:16.f];
_details.textColor = [UIColor redColor];
[self addSubview:_details];
}
return self;
}
- (void)accessData:(id)model {
if ([model isKindOfClass:[Model class]]) {
Model *dataModel = model;
_info.text = dataModel.info;
_info.frame = CGRectMake(10, 10, 300, 20);
[_info sizeToFit];
_subInfo.text = dataModel.subInfo;
_subInfo.frame = CGRectMake(10, _info.height + 10, 300, 20);
[_subInfo sizeToFit];
_details.text = dataModel.details;
_details.frame = CGRectMake(10, _info.height + _subInfo.height + 10, 300, 20);
[_details sizeToFit];
}
}
@end工具类 UIView+SetRect
//
// UIView+SetRect.h
// TestPch
//
// Created by YouXianMing on 14-9-26.
// Copyright (c) 2014年 YouXianMing. All rights reserved.
//
#import <UIKit/UIKit.h>
@interface UIView (SetRect)
// Frame
@property (nonatomic) CGPoint viewOrigin;
@property (nonatomic) CGSize viewSize;
// Frame Origin
@property (nonatomic) CGFloat x;
@property (nonatomic) CGFloat y;
// Frame Size
@property (nonatomic) CGFloat width;
@property (nonatomic) CGFloat height;
// Frame Borders
@property (nonatomic) CGFloat top;
@property (nonatomic) CGFloat left;
@property (nonatomic) CGFloat bottom;
@property (nonatomic) CGFloat right;
// Center Point
#if !IS_IOS_DEVICE
@property (nonatomic) CGPoint center;
#endif
@property (nonatomic) CGFloat centerX;
@property (nonatomic) CGFloat centerY;
// Middle Point
@property (nonatomic, readonly) CGPoint middlePoint;
@property (nonatomic, readonly) CGFloat middleX;
@property (nonatomic, readonly) CGFloat middleY;
@end//
// UIView+SetRect.m
// TestPch
//
// Created by YouXianMing on 14-9-26.
// Copyright (c) 2014年 YouXianMing. All rights reserved.
//
#import "UIView+SetRect.h"
@implementation UIView (SetRect)
#pragma mark Frame
- (CGPoint)viewOrigin
{
return self.frame.origin;
}
- (void)setViewOrigin:(CGPoint)newOrigin
{
CGRect newFrame = self.frame;
newFrame.origin = newOrigin;
self.frame = newFrame;
}
- (CGSize)viewSize
{
return self.frame.size;
}
- (void)setViewSize:(CGSize)newSize
{
CGRect newFrame = self.frame;
newFrame.size = newSize;
self.frame = newFrame;
}
#pragma mark Frame Origin
- (CGFloat)x
{
return self.frame.origin.x;
}
- (void)setX:(CGFloat)newX
{
CGRect newFrame = self.frame;
newFrame.origin.x = newX;
self.frame = newFrame;
}
- (CGFloat)y
{
return self.frame.origin.y;
}
- (void)setY:(CGFloat)newY
{
CGRect newFrame = self.frame;
newFrame.origin.y = newY;
self.frame = newFrame;
}
#pragma mark Frame Size
- (CGFloat)height
{
return self.frame.size.height;
}
- (void)setHeight:(CGFloat)newHeight
{
CGRect newFrame = self.frame;
newFrame.size.height = newHeight;
self.frame = newFrame;
}
- (CGFloat)width
{
return self.frame.size.width;
}
- (void)setWidth:(CGFloat)newWidth
{
CGRect newFrame = self.frame;
newFrame.size.width = newWidth;
self.frame = newFrame;
}
#pragma mark Frame Borders
- (CGFloat)left
{
return self.x;
}
- (void)setLeft:(CGFloat)left
{
self.x = left;
}
- (CGFloat)right
{
return self.frame.origin.x + self.frame.size.width;
}
- (void)setRight:(CGFloat)right
{
self.x = right - self.width;
}
- (CGFloat)top
{
return self.y;
}
- (void)setTop:(CGFloat)top
{
self.y = top;
}
- (CGFloat)bottom
{
return self.frame.origin.y + self.frame.size.height;
}
- (void)setBottom:(CGFloat)bottom
{
self.y = bottom - self.height;
}
#pragma mark Center Point
#if !IS_IOS_DEVICE
- (CGPoint)center
{
return CGPointMake(self.left + self.middleX, self.top + self.middleY);
}
- (void)setCenter:(CGPoint)newCenter
{
self.left = newCenter.x - self.middleX;
self.top = newCenter.y - self.middleY;
}
#endif
- (CGFloat)centerX
{
return self.center.x;
}
- (void)setCenterX:(CGFloat)newCenterX
{
self.center = CGPointMake(newCenterX, self.center.y);
}
- (CGFloat)centerY
{
return self.center.y;
}
- (void)setCenterY:(CGFloat)newCenterY
{
self.center = CGPointMake(self.center.x, newCenterY);
}
#pragma mark Middle Point
- (CGPoint)middlePoint
{
return CGPointMake(self.middleX, self.middleY);
}
- (CGFloat)middleX
{
return self.width / 2;
}
- (CGFloat)middleY
{
return self.height / 2;
}
@end控制器
//
// ViewController.m
// HeightModel
//
// Created by YouXianMing on 15/1/10.
// Copyright (c) 2015年 YouXianMing. All rights reserved.
//
#import "ViewController.h"
#import "Model.h"
#import "ModelCell.h"
static NSString *modelCellFlag = @"ModelCell.h";
@interface ViewController ()<UITableViewDataSource, UITableViewDelegate>
@property (nonatomic, strong) UITableView *tableView;
@property (nonatomic, strong) NSMutableArray *dataModelArray;
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
// 数据源
self.dataModelArray = [NSMutableArray array];
[self.dataModelArray addObject:[[Model alloc] initWithDictionary:@{@"info" : @"P.K.",
@"subInfo": @"逝者如斯，而未尝往也；盈虚者如彼，而卒莫消长也。盖将自其变者而观之，则天地曾不能以一瞬；自其不变者而观之，则物与我皆无尽也。",
@"details": @""}]];
[self.dataModelArray addObject:[[Model alloc] initWithDictionary:@{@"info" : @"YouXianMing",
@"subInfo": @"合抱之木，生于毫末；九层之合，起于垒土；千里之行，始于足下。",
@"details": @"精简计算UITableView文本高度"}]];
[self.dataModelArray addObject:[[Model alloc] initWithDictionary:@{@"info" : @"Q.L.",
@"subInfo": @"",
@"details": @""}]];
[self.dataModelArray addObject:[[Model alloc] initWithDictionary:@{@"info" : @"",
@"subInfo": @"",
@"details": @"This is a test ok ?"}]];
[self.dataModelArray addObject:[[Model alloc] initWithDictionary:@{@"info" : @"",
@"subInfo": @"YouXianMing 한 iOS 개발 엔지니어, 사랑 사랑 기술, 생활, 기꺼이 바치다, 좋아하는 게임만 좋아하는 것을 좋아하는 사람이다 가축, 학습, 확신하다 천도 보수 자주!",
@"details": @""}]];
[self.dataModelArray addObject:[[Model alloc] initWithDictionary:@{@"info" : @"遊賢明はiOS開発エンジニア、愛する技術で、生活を愛し、献身、ゲームが好き、好きなものを食べて、美食愛好家、天道酬勤を学ぶことが好きで、信じ！",
@"subInfo": @"",
@"details": @"YouXianMing copyright."}]];
[self.dataModelArray addObject:[[Model alloc] initWithDictionary:@{@"info" : @"ว่ายน้ำที่ชาญฉลาดเป็น iOS วิศวกรพัฒนาเทคโนโลยีและรักชีวิตรักและทุ่มเทและชอบเล่นเกมชอบกินอะไรดีเลยชอบการเรียนรู้และเชื่อว่าไม่มีอะไรเลย",
@"subInfo": @"Nager sage est un ingénieur, le développement de la technologie iOS amour, de l'amour de la vie, de dévouement, de jouer le jeu, aime manger, c'est un bon à rien, comme l'apprentissage, convaincu que Tiandaochouqin!",
@"details": @"entwickler, liebe, Leben, liebe, hingabe, Wie Spiele, der Gern Essen, ist ein Nahrungsmittel, Wie Lernen, Davon überzeugt, dass Gott"}]];
// tableView
self.tableView = [[UITableView alloc] initWithFrame:self.view.bounds
style:UITableViewStylePlain];
self.tableView.delegate = self;
self.tableView.dataSource = self;
[self.tableView registerClass:[ModelCell class] forCellReuseIdentifier:modelCellFlag];
[self.view addSubview:self.tableView];
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
return self.dataModelArray.count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
ModelCell *cell = [tableView dequeueReusableCellWithIdentifier:modelCellFlag];
cell.selectionStyle = UITableViewCellSelectionStyleNone;
[cell accessData:self.dataModelArray[indexPath.row]];
return cell;
}
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {
Model *model = self.dataModelArray[indexPath.row];
return 20 + model.totalHeight;
}
@end一些需要注意的地方：
