UIButton*button=[[UIButton alloc]initWithFrame:CGRectMake(100,100,200,40)];button.backgroundColor=[UIColor redColor];[button setTitle:@"我是11111\n 我要换行"forState:UIControlStateNormal];button.titleLabel.lineBreakMode=0;//这句话很重要，不加这句话加上换行符也没用[self.view addSubview:button];
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