Ios-ui Control UITableView (iii)-custom cell with unequal height

Storyboard_ High-contrast custom high cell, requires several additional steps (IOS8 is supported at the beginning)

• To add a spacing constraint between a child control and a Contentview

• Set the true implementation height of the Tableviewcell and estimate the row height

// 告诉tableView所有cell的真实高度是自动计算（根据设置的约束来计算）self.tableView.rowHeight = UITableViewAutomaticDimension;// 告诉tableView所有cell的估算高度self.tableView.estimatedRowHeight = 44;

• To change the cell height, simply change the value of the constraint.

If you want to support iOS8 before

• If there is a wrap label inside the cell, you need to set the Preferredmaxlayoutwidth property

- (void)awakeFromNib{    // 手动设置文字的最大宽度（目的是：让label知道自己文字的最大宽度，进而能够计算出自己的frame）    self.text_label.preferredMaxLayoutWidth = [UIScreen mainScreen].bounds.size.width - 20;}

• Set the cell estimate height for TableView

// 告诉tableView所有cell的估算高度(设置了估算高度，就可以减少tableView:heightForRowAtIndexPath:方法的调用次数)self.tableView.estimatedRowHeight = 200;

• Calculating the cell height in the proxy method

Xmgstatuscell *cell;-(CGFloat) TableView: (UITableView *) TableView Heightforrowatindexpath: (Nsindexpath *) indexpath{Create a cell (the role of the cell: Calculate the cell's height based on the child controls that are laid out by the model data)if (!cell) {cell = [TableView dequeuereusablecellwithidentifier:id];}Set model data cell. Status =Self. Statuses[indexpath. row];return cell.height;} -(cgfloat) height{//Force layout of all child controls inside the cell ( Label based on the number of words to calculate their true size) [self layoutifneeded]; //calculate cell height if (self.status.picture) {return CGRectGetMaxY ( Span class= "Hljs-keyword" >self.pictureimageview.frame) + 10;} else {return cgrectgetmaxy (self .text_label.frame) + 10;}}   

Ios-ui Control UITableView (iii)-custom cell with unequal height