UITableViewCell如何自动拉伸

1.现在xib中设置好布局

2. 将需要的拉伸的控件拖到.m文件中，设置preferredMaxLayoutWidth属性

 #import "TMContentCell.h"
 
 
@interface TMContentCell()
 @property (weak, nonatomic) IBOutlet UILabel *label;
 
 
@end
 
 
@implementation TMContentCell
 
 
-(instancetype)init {
 if (self = [super init]) {
 self = [[NSBundle mainBundle] loadNibNamed:@"TMContentCell" owner:nil options:nil].firstObject;
 }
 return self;
 }
 
 
-(void)awakeFromNib {
 // Initialization code
 self.label.preferredMaxLayoutWidth = [UIScreen mainScreen].bounds.size.width - 16;
 // [self.label setContentHuggingPriority:UILayoutPriorityRequired forAxis:UILayoutConstraintAxisVertical];
 }
 
 
-(void)setSelected:(BOOL)selected animated:(BOOL)animated {
 [super setSelected:selected animated:animated];
 }
 
 
@end
 
 
 
 
之后再heightForRowAtIndexPath 中设置指定cell的systemLayoutSizeFittingSize属性
 
 

 -(void)createUI {
 UITableView *tableView = [[UITableView alloc] initWithFrame:self.view.frame];
 tableView.delegate = self;
 tableView.dataSource = self;
 [self.view addSubview:tableView];
 }
 
 
-(NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
 return 1;
 }
 
 
-(CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {
 
 
CGFloat height = [[[TMContentCell alloc] init].contentView systemLayoutSizeFittingSize:UILayoutFittingCompressedSize].height + 0.5;

return height;
 
 
}
 
 
-(UITableViewCell*)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
 UITableViewCell *cell = [[TMContentCell alloc] init];
 
 
return cell;
 
 
}
 
 
 
demo