买来叶孤城的电子书看到书中有这么一个场景,每个cell上有不定个按钮或者View.怎嘛写好呢?for循环布局?一个cell上如果很多view呢?......
把collectionView放在cell里其实挺好的,还有每个每个cell的点击事件直接可以写在 代理方法中..
先简要说明一下思路
1创建一个tableView加到控制器上 遵守协议实现代理方法...不拉不拉那一堆事...... 返回一个 固定高度(因为这个时候不知道那个每个cell的高度是多少合适,先固定 以后变)
2重写tableViewCell 在cell中创建 collectionView并且加到cell中 注意 因为collectionView的高度是根据cell来说的,这个时候还不知道cell有多少先随便给一个定值 (后期再改)collectionView用masonry写约束 是 top left right height
问题
怎么得到collectionView的内容视图的的高度呢? 知道collectionView的内容视图的的高度之后改了collectionView的高度,怎嘛改变 tableViewCell的高度呢?
一切尽在代码中
控制器.h
//
// ViewController.h
// tableViewCell中加载collectionView
//
// Created by 3D on 16/7/20.
// Copyright © 2016年 3D. All rights reserved.
//
#import
@interface ViewController : UIViewController
@end
控制器.m
//
// ViewController.m
// tableViewCell中加载collectionView
//
// Created by 3D on 16/7/20.
// Copyright © 2016年 3D. All rights reserved.
//
#import "ViewController.h"
#import "testTableViewCell.h"
@interface ViewController ()
@property(nonatomic,strong)UITableView *tableView;
@property(nonatomic,strong)testTableViewCell *toolCell;
@property(nonatomic,strong)NSArray *dataArr;
@property(nonatomic,strong)NSMutableDictionary *dicH;
@property(nonatomic,strong)UILabel *numLabel;
@property(nonatomic,strong)CADisplayLink *displayLink;
@property(nonatomic,assign)NSTimeInterval lastTime;
@property(nonatomic,assign)NSInteger count;
@end
@implementation ViewController
-(NSArray *)dataArr{
if (!_dataArr) {
_dataArr = @[
@[@"g"],
@[@"g",@"b"],
@[@"g",@"b",@"a"],
@[@"g",@"b",@"c",@"e"],
@[@"g",@"b",@"c",@"e",@"a"],
@[@"g",@"b",@"c",@"e",@"b",@"c"],
@[@"g",@"b",@"c",@"e",@"b",@"c",@"a"],
@[@"g",@"b",@"c",@"e",@"b",@"c",@"b",@"c"],
@[@"g",@"b",@"c",@"e",@"b",@"c",@"e",@"d",@"g"],
@[@"g",@"b",@"c",@"e",@"b",@"c",@"e",@"d",@"a",@"c"],
@[@"g",@"b",@"c",@"e",@"b",@"c",@"e",@"d",@"a",@"c",@"e"],
@[@"g",@"b",@"c",@"e",@"b",@"c",@"e",@"d",@"a",@"c",@"a",@"b"],
@[@"g",@"b",@"c",@"e",@"b",@"c",@"e",@"d",@"a",@"c",@"a",@"b",@"a"],
@[@"g",@"b",@"c",@"e",@"b",@"c",@"e",@"d",@"a",@"c",@"a",@"b",@"a",@"14"],
@[@"g",@"b",@"c",@"e",@"b",@"c",@"e",@"d",@"a",@"c",@"a",@"b",@"a",@"14",@"15"],
@[@"g",@"b",@"c",@"e",@"b",@"c",@"e",@"d",@"a",@"c",@"a",@"b",@"a",@"14",@"15",@"16"],
@[@"g",@"b",@"c",@"e",@"b",@"c",@"e",@"d",@"a",@"c",@"a",@"b",@"a",@"14",@"15",@"16",@"17"],
@[@"g",@"b",@"c",@"e",@"b",@"c",@"e",@"d",@"a",@"c",@"a",@"b",@"a",@"14",@"15",@"16",@"17",@"18"],
@[@"g",@"b",@"c",@"e",@"b",@"c",@"e",@"d",@"a",@"c",@"a",@"b",@"a",@"14",@"15",@"16",@"17",@"18",@"19"],
@[@"g",@"b",@"c",@"e",@"b",@"c",@"e",@"d",@"a",@"c",@"a",@"b",@"a",@"14",@"15",@"16",@"17",@"18",@"19",@"20"],
@[@"g",@"b",@"c",@"e",@"b",@"c",@"e",@"d",@"a",@"c",@"a",@"b",@"a",@"14",@"15",@"16",@"17",@"18",@"19",@"20",@"21"],
@[@"g",@"b",@"c",@"e",@"b",@"c",@"e",@"d",@"a",@"c",@"a",@"b",@"a",@"14",@"15",@"16",@"17",@"18",@"19",@"20",@"21",@"22"],
@[@"g",@"b",@"c",@"e",@"b",@"c",@"e",@"d",@"a",@"c",@"a",@"b",@"a",@"14",@"15",@"16",@"17",@"18",@"19",@"20",@"21",@"22",@"23"],
@[@"g",@"b",@"c",@"e",@"b",@"c",@"e",@"d",@"a",@"c",@"a",@"b",@"a",@"14",@"15",@"16",@"17",@"18",@"19",@"20",@"21",@"22",@"23",@"24"]
];
}
return _dataArr;
}
-(UITableView *)tableView{
if (!_tableView) {
_tableView = [[UITableView alloc]initWithFrame:self.view.bounds style:UITableViewStylePlain];
_tableView.delegate = self;
_tableView.dataSource = self;
[_tableView registerClass:[testTableViewCell class] forCellReuseIdentifier:@"cell"];
}
return _tableView;
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
return self.dataArr.count;
}
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{
testTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"cell" forIndexPath:indexPath];
cell.lable.text = [NSString stringWithFormat:@"%ld",indexPath.row];
cell.deleget = self;
cell.indexPath = indexPath;
cell.dataArr = self.dataArr[indexPath.row];
return cell;
}
-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath{
if (self.dicH[indexPath]) {
NSNumber *num = self.dicH[indexPath];
return [num floatValue];
}else{
return 80;
}
}
-(void)uodataTableViewCellHight:(testTableViewCell *)cell andHight:(CGFloat)hight andIndexPath:(NSIndexPath *)indexPath{
if (![self.dicH[indexPath] isEqualToNumber: @(hight)]) {
self.dicH[indexPath] = @(hight);
NSLog(@"indexPath.row = %ld",indexPath.row);
NSLog(@"高度 = %lf",[@(hight) floatValue]);
[self.tableView reloadData];
}
}
#pragma mark 下面是检测流畅度
- (void)viewDidLoad {
[super viewDidLoad];
[self.view addSubview:self.tableView];
[self setupUI];
_displayLink = [CADisplayLink displayLinkWithTarget:self selector:@selector(displayAction:)];
[_displayLink addToRunLoop:[NSRunLoop currentRunLoop] forMode:NSRunLoopCommonModes];
}
-(void)dealloc
{
[_displayLink removeFromRunLoop:[NSRunLoop currentRunLoop] forMode:NSRunLoopCommonModes];
_displayLink = nil;
}
-(void)setupUI
{
_numLabel = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 50, 20)];
_numLabel.text = @"60";
_numLabel.textColor = [UIColor greenColor];
_numLabel.backgroundColor = [UIColor blackColor];
[self.view addSubview:_numLabel];
}
-(void)displayAction:(id)sender
{
if (_lastTime == 0) {
_lastTime = _displayLink.timestamp;
return;
}
_count++;
NSTimeInterval delta = _displayLink.timestamp - _lastTime;
if (delta < 1) return;
_lastTime = _displayLink.timestamp;
float fps = _count / delta;
_count = 0;
NSString *text = [[NSString alloc] initWithString:[NSString stringWithFormat:@"%d FPS", (int)round(fps)]];
_numLabel.text = text;
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
#pragma mark 保存cell高度
- (NSMutableDictionary *)dicH {
if(_dicH == nil) {
_dicH = [[NSMutableDictionary alloc] init];
}
return _dicH;
}
@end
testTableViewCell.h
//
// testTableViewCell.h
// tableViewCell中加载collectionView
//
// Created by 3D on 16/7/20.
// Copyright © 2016年 3D. All rights reserved.
//
#import
@class testTableViewCell;
@protocol testTableViewCellDelegate
-(void)uodataTableViewCellHight:(testTableViewCell*)cell andHight:(CGFloat)hight andIndexPath:(NSIndexPath *)indexPath;
@end
@interface testTableViewCell : UITableViewCell
@property(nonatomic,strong)NSIndexPath *indexPath;
@property(nonatomic,strong)NSArray *dataArr;
@property(nonatomic,weak) iddeleget;
@property(nonatomic,strong)UILabel *lable;
@end
testTableViewCell.m
//
// testTableViewCell.m
// tableViewCell中加载collectionView
//
// Created by 3D on 16/7/20.
// Copyright © 2016年 3D. All rights reserved.
//
#import "testTableViewCell.h"
#import "textCollectionViewCell.h"
#import
@interface testTableViewCell ()
@property(nonatomic,strong)UICollectionView *collectionView;
@property(nonatomic,assign)CGFloat hightED;
@end
@implementation testTableViewCell
-(instancetype)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier{
self.hightED = 0.0;
if (self = [super initWithStyle:style reuseIdentifier:reuseIdentifier]) {
self.lable = [[UILabel alloc]initWithFrame:CGRectMake(0, 0, 50, 50)];
[self.contentView addSubview:self.lable];
[self.contentView addSubview:self.collectionView];
[self.collectionView mas_makeConstraints:^(MASConstraintMaker *make) {
make.top.mas_equalTo(0);
make.left.mas_equalTo(50);
make.right.mas_equalTo(-50);
make.height.mas_equalTo(50);//先随定一个
}];
}
return self;
}
-(UICollectionView *)collectionView{
if (!_collectionView) {
UICollectionViewFlowLayout *layout = [[UICollectionViewFlowLayout alloc]init];
layout.scrollDirection = UICollectionViewScrollDirectionVertical;
_collectionView = [[UICollectionView alloc]initWithFrame:CGRectZero collectionViewLayout:layout];
_collectionView.delegate = self;
_collectionView.dataSource = self;
[_collectionView registerClass:[textCollectionViewCell class] forCellWithReuseIdentifier:@"123"];
_collectionView.backgroundColor = [UIColor yellowColor];
}
return _collectionView;
}
-(void)setDataArr:(NSArray *)dataArr{
[self.collectionView reloadData]; //重新换数据源的时候 记得重回用的cell上的colletionView重新加载数据
self.hightED = 0; //当重新换数据源的时候 初始化自己的高度. (如果不写 就有一种意外比如 比如一个cell被重用,开始这个cell的collectionView的cell 和重用之后是一样的 self.hightED != hight 重用之前 和重用之后的内容高度 很定是一样的啊 那么他的高度是不用跟新 但是更新tableViewCell的高度的 代理方法还是 要走吧)
_dataArr = dataArr;
}
- (NSInteger)collectionView:(UICollectionView *)collectionView numberOfItemsInSection:(NSInteger)section{
if (self.dataArr.count == 0) {
return 1;
}else{
return self.dataArr.count;
}
}
- (UICollectionViewCell *)collectionView:(UICollectionView *)collectionView cellForItemAtIndexPath:(NSIndexPath *)indexPath{
textCollectionViewCell *cell = [collectionView dequeueReusableCellWithReuseIdentifier:@"123" forIndexPath: indexPath];
cell.backgroundColor = [UIColor blackColor];
[self updateCollectionViewHight:self.collectionView.collectionViewLayout.collectionViewContentSize.height];
return cell;
}
- (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout sizeForItemAtIndexPath:(NSIndexPath *)indexPath{
return CGSizeMake(40, 60);
}
- (UIEdgeInsets)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout insetForSectionAtIndex:(NSInteger)section{
return UIEdgeInsetsMake(10, 10, 10, 10);
}
- (CGFloat)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout minimumLineSpacingForSectionAtIndex:(NSInteger)section{
return 10;
}
- (CGFloat)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout minimumInteritemSpacingForSectionAtIndex:(NSInteger)section{
return 10;
}
-(void)updateCollectionViewHight:(CGFloat)hight{
NSLog(@"+%@",self);
NSLog(@"++ %f",self.hightED);
NSLog(@"+++ %f",hight);
if (self.hightED != hight) { //这个判断起到两个作用 第一 以为这个方法被调用多次这样写 保证 每个cell里面调用一次,切只调用一次 第二是当cell被重用从用的cell上的collectionView内容高度不一样的时候重新 更新跟新高度
self.hightED = hight;
NSLog(@"+++++%ld",self.indexPath.row);
[self.collectionView mas_updateConstraints:^(MASConstraintMaker *make) {
make.height.mas_equalTo(hight);
}];
if (_deleget && [_deleget respondsToSelector:@selector(uodataTableViewCellHight:andHight:andIndexPath:)]) {
[self.deleget uodataTableViewCellHight:self andHight:hight andIndexPath:self.indexPath];
}
}
}
- (void)awakeFromNib {
// Initialization code
}
- (void)setSelected:(BOOL)selected animated:(BOOL)animated {
[super setSelected:selected animated:animated];
// Configure the view for the selected state
}
@end
textCollectionViewCell.h
//
// textCollectionViewCell.h
// tableViewCell中加载collectionView
//
// Created by 3D on 16/7/20.
// Copyright © 2016年 3D. All rights reserved.
//
#import
@interface textCollectionViewCell : UICollectionViewCell
@property(nonatomic,strong)NSString *imageName;
@end
textCollectionViewCell.m
//
// textCollectionViewCell.m
// tableViewCell中加载collectionView
//
// Created by 3D on 16/7/20.
// Copyright © 2016年 3D. All rights reserved.
//
#import "textCollectionViewCell.h"
@interface textCollectionViewCell ()
@property(nonatomic,strong)UIImageView *imageView;
@end
@implementation textCollectionViewCell
-(instancetype)initWithFrame:(CGRect)fram{
if (self = [super initWithFrame:fram]) {
self.imageView = [[UIImageView alloc]init];
self.backgroundView = self.imageView;
self.imageView.image = [UIImage imageNamed:@"a"];
}
return self;
}
-(void)setImageName:(NSString *)imageName{
_imageName = imageName;
self.imageView.image = [UIImage imageNamed:_imageName];
}
@end
在最后我有一个疑问,为啥模拟器卡的一比,而真机比较流畅.
哪里写的不好请指出互相学习
6808D59A-6AB8-4190-910F-1D878DE26710.png
运行效果图
2016-07-21 18_15_47.gif