TableView高度自适应（Masonry约束）
高度自适应需要TableView设置为自动适配高度，cell添加约束，约束没问题，高度自适应就不会出问题：
-UITableViewAutomaticDimension设置为高度自适应
- Masonry添加约束（也可以用xib）
TableVIew设置为自动适配高度
_ (CGFloat)tableView:(UITableView )tableView heightForRowAtIndexPath:(NSIndexPath )indexPath
{
//自动计算行高
return UITableViewAutomaticDimension;
}
masonry约束
.m文件（cell）
[_imgView mas_makeConstraints:^(MASConstraintMaker *make) {
make.top.equalTo(self.contentView).equalTo(@0);
make.left.equalTo(self.contentView).equalTo(@0);
make.right.equalTo(self.contentView).equalTo(@0);
make.height.equalTo(@200);
}];
[_lable mas_makeConstraints:^(MASConstraintMaker *make) {
make.top.equalTo(self.imgView.mas_bottom).equalTo(@20);
make.left.equalTo(self.contentView).equalTo(@20);
make.right.equalTo(self.contentView).equalTo(@-20);
make.bottom.equalTo(self.timeLable.mas_top).equalTo(@-20);
}];
[_timeLable mas_makeConstraints:^(MASConstraintMaker *make) {
make.left.equalTo(self.contentView).equalTo(@20);
make.width.equalTo(@100);
make.bottom.equalTo(self.contentView).equalTo(@-20);
}];
[_buttou mas_makeConstraints:^(MASConstraintMaker *make) {
make.top.equalTo(self.timeLable).equalTo(@0);
make.left.equalTo(self.timeLable.mas_right).equalTo(@20);
make.width.equalTo(@60);
make.bottom.equalTo(self.contentView).equalTo(@-20);
}];
[_other mas_makeConstraints:^(MASConstraintMaker *make) {
make.top.equalTo(self.timeLable).equalTo(@0);
make.left.equalTo(self.buttou.mas_right).equalTo(@20);
make.width.equalTo(@60);
make.bottom.equalTo(self.contentView).equalTo(@-20);
}];
重要代码
viewController.m代码
#
- (void)creatView
{
self.tableView = [[UITableView alloc]initWithFrame:CGRectMake(0, 0, 0, 0) style:UITableViewStylePlain];
self.tableView.backgroundColor = [UIColor whiteColor];
self.tableView.delegate = self;
self.tableView.dataSource = self;
[self.view addSubview:self.tableView];
[_tableView mas_makeConstraints:^(MASConstraintMaker *make) {
make.width.equalTo(self.view);
make.height.equalTo(self.view);
}];
}
#
-(NSMutableDictionary *)heightAtIndexPath
{
if (!_heightAtIndexPath) {
_heightAtIndexPath = [NSMutableDictionary dictionary];
}
return _heightAtIndexPath;
}
#
- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
return 1;
}
#
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
return _arrayData.count;
}
#
-(UITableViewCell )tableView:(UITableView )tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
ViewTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:[NSString stringWithFormat:@"CellID%ld",(long)indexPath.row]];
if (!cell) {
cell = [[ViewTableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:[NSString stringWithFormat:@"CellID%ld",(long)indexPath.row]];
}
cell.selectionStyle = UITableViewCellSelectionStyleNone;
cell.imgView.image = [UIImage imageNamed:@"image"];
cell.lable.text = _arrayData[indexPath.row];
cell.timeLable.text = @"2018.09.10";
cell.touchBlock = ^{
[self.arrayData replaceObjectAtIndex:indexPath.row withObject:[NSString stringWithFormat:@"点击了第%d行",indexPath.row]];
[tableView reloadRowsAtIndexPaths:[NSArray arrayWithObjects:indexPath,nil] withRowAnimation:UITableViewRowAnimationNone];
};
cell.removeBlock = ^{
[self.arrayData removeObjectAtIndex:indexPath.row];
[self.heightAtIndexPath removeAllObjects];
[self.tableView reloadData];
};
return cell;
}
pragma mark - UITableViewDelegate
-(CGFloat)tableView:(UITableView )tableView estimatedHeightForRowAtIndexPath:(NSIndexPath )indexPath
{
//判断是否有缓存好的高度，有直接赋值，没有就给一个高度（这个高度随便写，会自动适配好高度）
NSNumber *height = [self.heightAtIndexPath objectForKey:indexPath];
if(height)
{
return height.floatValue;
}
else
{
return 100;
}
}
#
- (CGFloat)tableView:(UITableView )tableView heightForRowAtIndexPath:(NSIndexPath )indexPath
{
//自动计算行高
return UITableViewAutomaticDimension;
}
#
- (void)tableView:(UITableView )tableView willDisplayCell:(UITableViewCell )cell forRowAtIndexPath:(NSIndexPath *)indexPath
{
//cell初始化完成，缓存cell的高度到字典中
NSNumber *height = @(cell.frame.size.height);
[self.heightAtIndexPath setObject:height forKey:indexPath];
}
ViewTableViewCell.m
#
- (instancetype)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier
{
self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];
if (self) {
[self initLayout];
}
return self;
}
#
- (void)initLayout
{
_imgView = [[UIImageView alloc]init];
_imgView.backgroundColor = [UIColor whiteColor];
[self.contentView addSubview:_imgView];
_lable = [[UILabel alloc]init];
_lable.textColor = [UIColor blackColor];
_lable.font = [UIFont systemFontOfSize:14];
_lable.textAlignment = NSTextAlignmentLeft;
_lable.backgroundColor = [UIColor whiteColor];
_lable.numberOfLines = 0;
[self.contentView addSubview:_lable];
_timeLable = [[UILabel alloc]init];
_timeLable.textColor = [UIColor blackColor];
_timeLable.font = [UIFont systemFontOfSize:14];
_timeLable.textAlignment = NSTextAlignmentLeft;
_timeLable.backgroundColor = [UIColor whiteColor];
[self.contentView addSubview:_timeLable];
_buttou = [UIButton buttonWithType:UIButtonTypeCustom];
[_buttou setTitle:@"点击" forState:UIControlStateNormal];
[_buttou addTarget:self action:@selector(touchBtnDemo) forControlEvents:UIControlEventTouchUpInside];
[self.contentView addSubview:_buttou];
_other = [UIButton buttonWithType:UIButtonTypeCustom];
[_other setTitle:@"删除" forState:UIControlStateNormal];
[_other setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
[_other addTarget:self action:@selector(touchOtherDemo) forControlEvents:UIControlEventTouchUpInside];
[self.contentView addSubview:_other];
[_imgView mas_makeConstraints:^(MASConstraintMaker *make) {
make.top.equalTo(self.contentView).equalTo(@0);
make.left.equalTo(self.contentView).equalTo(@0);
make.right.equalTo(self.contentView).equalTo(@0);
make.height.equalTo(@200);
}];
[_lable mas_makeConstraints:^(MASConstraintMaker *make) {
make.top.equalTo(self.imgView.mas_bottom).equalTo(@20);
make.left.equalTo(self.contentView).equalTo(@20);
make.right.equalTo(self.contentView).equalTo(@-20);
make.bottom.equalTo(self.timeLable.mas_top).equalTo(@-20);
}];
[_timeLable mas_makeConstraints:^(MASConstraintMaker *make) {
make.left.equalTo(self.contentView).equalTo(@20);
make.width.equalTo(@100);
make.bottom.equalTo(self.contentView).equalTo(@-20);
}];
[_buttou mas_makeConstraints:^(MASConstraintMaker *make) {
make.top.equalTo(self.timeLable).equalTo(@0);
make.left.equalTo(self.timeLable.mas_right).equalTo(@20);
make.width.equalTo(@60);
make.bottom.equalTo(self.contentView).equalTo(@-20);
}];
[_other mas_makeConstraints:^(MASConstraintMaker *make) {
make.top.equalTo(self.timeLable).equalTo(@0);
make.left.equalTo(self.buttou.mas_right).equalTo(@20);
make.width.equalTo(@60);
make.bottom.equalTo(self.contentView).equalTo(@-20);
}];
}
#
- (void)touchBtnDemo
{
if (self.touchBlock) {
self.touchBlock();
}
}
#
- (void)touchOtherDemo
{
if (self.removeBlock) {
self.removeBlock();
}
}