IOS中Label根据上个label的内容设置下个label的frame

#import "ViewController.h"

@interface ViewController ()

@property(nonatomic,strong)UILabel *labelOne;

@property(nonatomic,strong)UILabel *labelTwo;

@property(nonatomic,copy)NSString *str;

@end

@implementation ViewController

- (void)viewDidLoad {

[super viewDidLoad];

// Do any additional setup after loading the view, typically from a nib.

NSString *strOne=@"搜房网是全球最大的房地产家居网络平台，页面浏览量和访问量在同类网站中处于绝对领先地位。拥有9000名员工，网络业务覆盖300多个城市，在中国100多个城市拥有分公司和办公室。2010年9月搜房网（股票代码SFUN）在美国纽约证券交易所成功上市。搜房网是全球最大的房地产家居网络平台，页面浏览量和访问量在同类网站中处于绝对领先地位。拥有9000名员工，网络业务覆盖300多个城市，在中国100多个城市拥有分公司和办公室。2010年9月搜房网（股票代码SFUN）在美国纽约证券交易所成功上市。";

self.str=strOne;

self.labelOne=[[UILabel alloc]init];

self.labelOne.numberOfLines=0;

self.labelOne.font=[UIFont systemFontOfSize:14];

self.labelOne.textAlignment=NSTextAlignmentCenter;

self.labelOne.text=strOne;

self.labelTwo=[[UILabel alloc]init];

self.labelTwo.numberOfLines=0;

self.labelTwo.font=[UIFont systemFontOfSize:20];

self.labelTwo.textAlignment=NSTextAlignmentCenter;

self.labelTwo.text=strOne;

[self.view addSubview:self.labelOne];

[self.view addSubview:self.labelTwo];

}

- (void)didReceiveMemoryWarning {

[super didReceiveMemoryWarning];

// Dispose of any resources that can be recreated.

}

-(void)viewWillAppear:(BOOL)animated{

CGRect labelOneFrame=[self.str boundingRectWithSize:CGSizeMake(200, 0) options:NSStringDrawingUsesLineFragmentOrigin attributes:@{NSFontAttributeName:[UIFont systemFontOfSize:14]} context:nil];[super viewWillAppear:animated];

CGPoint PointOne=CGPointMake(100, 50);

CGRect labelframe;

labelframe.origin=PointOne;

labelframe.size=labelOneFrame.size;

self.labelOne.frame=labelframe;

CGRect labelTwoFrame=[self.str boundingRectWithSize:CGSizeMake(200, 0) options:NSStringDrawingUsesLineFragmentOrigin attributes:@{NSFontAttributeName:[UIFont systemFontOfSize:20]} context:nil];

CGPoint PointTwo=CGPointMake(self.labelOne.frame.origin.x, CGRectGetMaxY(self.labelOne.frame));

labelframe.origin=PointTwo;

labelframe.size=labelTwoFrame.size;

self.labelTwo.frame=labelframe;

}

@end

其实用自动布局就不用这么麻烦了