UILabel *dateLabel = [UILabel new];
dateLabel.textColor = [UIColor whiteColor];
dateLabel.font = [UIFont systemFontOfSize:16.f];
dateLabel.text = strDate;
//设置这句代码可以使控件自适应文字的长度
[dateLabel setContentHuggingPriority:UILayoutPriorityRequired forAxis:UILayoutConstraintAxisHorizontal];
[self.view addSubview:dateLabel];
[dateLabel mas_makeConstraints:^(MASConstraintMaker *make) {
make.top.equalTo(self).with.offset(30);
make.left.equalTo(self).with.offset(10);
make.height.equalTo(@19);
}];
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