Masonary三方自动布局

可以引入第三方的库来实现添加约束，Masonry是一套非常优秀的第三方框架，使用方便的语法，只管的语义实现对约束的管理。
步骤一：添加第三方库

第三方库的文件可以从Github上下载，直接拖拽到工程中即可。效果如图-1所示：

image image.png image.png image.png image.png image.png

yellowView此处可以简化
第一变

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第二变

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第三变
image.png
接着blueView代码
image.png

此处可简化

image.png
屏幕效果
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需求
image.png
image.png
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简化

grayView(1)

image.png

grayView(2)

image.png

orangeView(1)背景色改成orangeColor

image.png

orangeView(2)需求修改�

image.png
image.png

brownView

image.png

练习
屏幕效果

image.png

ViewController.m

#import "ViewController.h"
#define MAS_SHORTHAND_GLOBALS
#import "Masonry.h"
@interface ViewController ()
@property(nonatomic,strong)UIButton *closeButton;
@property(nonatomic,strong)UIImageView *logoImageView;
@property(nonatomic,strong)UITextField *phoneTextField;
@property(nonatomic,strong)UIButton *codeButton;
@property(nonatomic,strong)UITextField *codeTextField;
@property(nonatomic,strong)UIButton *passwordButton;
@property(nonatomic,strong)UIButton *protocolButton;
@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    [self closeButton];
    [self logoImageView];
    [self phoneTextField];
    [self codeButton];
    [self codeTextField];
    [self passwordButton];
    [self protocolButton];
}
-(UIButton *)protocolButton{
    if(!_protocolButton){
        _protocolButton= [UIButton buttonWithType:UIButtonTypeSystem];
        NSDictionary *dic = @{
                              NSFontAttributeName:[UIFont systemFontOfSize:12],
                              NSForegroundColorAttributeName:[UIColor orangeColor],
                              //设置下划线可见
                              NSUnderlineStyleAttributeName:@YES,
                              //设置下划线颜色
                              NSUnderlineColorAttributeName:[UIColor orangeColor]
                              };
        _protocolButton = [UIButton buttonWithType:UIButtonTypeSystem];
        NSAttributedString *title = [[NSAttributedString alloc]initWithString:@"用户协议" attributes:dic];
        [_protocolButton setAttributedTitle:title forState:UIControlStateNormal];
       
        
        UILabel *label = [[UILabel alloc]init];
        label.font = [UIFont systemFontOfSize:12];
        label.text = @"点击登陆，即表示您同意";
        UIStackView *sv = [[UIStackView alloc]init];
        [sv addArrangedSubview:label];
        [sv addArrangedSubview:_protocolButton];
        //设置子视图的排布方式
        sv.axis = UILayoutConstraintAxisHorizontal;
        [self.view addSubview:sv];
        [sv mas_makeConstraints:^(MASConstraintMaker *make) {
            make.centerX.equalTo(0);
            make.bottom.equalTo(-20);
        }];
    }
    return _protocolButton;
}
-(UIButton *)passwordButton{
    if(!_passwordButton){
        _passwordButton = [UIButton buttonWithType:UIButtonTypeSystem];
        NSDictionary *dic = @{
                              NSFontAttributeName:[UIFont systemFontOfSize:12],
                              NSForegroundColorAttributeName:[UIColor orangeColor],
                              //设置下划线可见
                              NSUnderlineStyleAttributeName:@YES,
                              //设置下划线颜色
                               NSUnderlineColorAttributeName:[UIColor orangeColor]
                              };
        _passwordButton = [UIButton buttonWithType:UIButtonTypeSystem];
        NSAttributedString *title = [[NSAttributedString alloc]initWithString:@"密码登陆" attributes:dic];
        [_passwordButton setAttributedTitle:title forState:UIControlStateNormal];
        [self.view addSubview:_passwordButton];
        [_passwordButton mas_makeConstraints:^(MASConstraintMaker *make) {
            make.right.equalTo(-25);
            make.top.equalTo(self.codeButton.mas_bottom).equalTo(30);
        }];
    }
    return _passwordButton;
}
-(UITextField *)codeTextField{
    if(!_codeTextField){
        _codeTextField = [[UITextField alloc]init];
        _codeTextField.placeholder = @"输入验证码";
        _codeTextField.keyboardType = UIKeyboardTypePhonePad;
        [self.view addSubview:_codeTextField];
        [_codeTextField mas_makeConstraints:^(MASConstraintMaker *make) {
            make.left.equalTo(self.phoneTextField);
            make.top.equalTo(self.phoneTextField.mas_bottom).offset(24);
            make.right.equalTo(self.codeButton.mas_left).offset(-10);
        }];
        UIView *lineview  = [[UIView alloc]init];
        [self.view addSubview:lineview];
        lineview.backgroundColor = [UIColor grayColor];
        [lineview mas_makeConstraints:^(MASConstraintMaker *make) {
            make.left.equalTo(10);
            make.right.equalTo(-10);
            make.top.equalTo(self.codeTextField.mas_bottom).offset(12);
            make.height.equalTo(1);
        }];
    }
    return _codeTextField;
}
-(UIButton *)codeButton{
    if (!_codeButton) {
        _codeButton = [UIButton buttonWithType:UIButtonTypeSystem];
        [_codeButton setBackgroundImage:[UIImage imageNamed:@"验证码框"] forState:UIControlStateNormal];
        [_codeButton setTitle:@"获取验证码" forState:UIControlStateNormal];
        [_codeButton setTitleColor:[UIColor orangeColor] forState:UIControlStateNormal];
        _codeButton.titleLabel.font = [UIFont systemFontOfSize:11];
        [self.view addSubview:_codeButton];
        [_codeButton mas_makeConstraints:^(MASConstraintMaker *make) {
            make.centerY.equalTo(self.codeTextField);
            make.right.equalTo(-25);
            make.height.equalTo(28);
            make.width.equalTo(90);
        }];
    }
    return _codeButton;
}
-(UIButton*)closeButton{
    if(!_closeButton){
       _closeButton = [UIButton buttonWithType:UIButtonTypeCustom];
        [_closeButton setBackgroundImage:[UIImage imageNamed:@"ahj"] forState:UIControlStateNormal];
        [_closeButton setBackgroundImage:[UIImage imageNamed:@"ahi"] forState:UIControlStateHighlighted];
        [self.view addSubview:_closeButton];
        [_closeButton mas_makeConstraints:^(MASConstraintMaker *make) {
            make.top.equalTo(24);
            make.right.equalTo(-17);
        }];
    }
    return _closeButton;
}
-(UIImageView *)logoImageView{
    if(!_logoImageView){
        _logoImageView = [[UIImageView alloc]initWithImage:[UIImage imageNamed:@"logo"]];
        [self.view addSubview:_logoImageView];
        [_logoImageView mas_makeConstraints:^(MASConstraintMaker *make) {
       
            make.top.equalTo(80);
           make.centerX.equalTo(0);
        }];
    }
    return _logoImageView;
}
-(UITextField *)phoneTextField{
    if(!_phoneTextField){
        _phoneTextField = [[UITextField alloc]init];
        _phoneTextField.placeholder = @"输入手机号";
        _phoneTextField.keyboardType = UIKeyboardTypePhonePad;
        [self.view addSubview:_phoneTextField];
        [_phoneTextField mas_makeConstraints:^(MASConstraintMaker *make) {
            make.left.equalTo(25);
            make.right.equalTo(-25);
            make.top.equalTo(self.logoImageView.mas_bottom).offset(30);
        }];
        //第一种给textfeild加下划线
//        UIImageView *imageView = [[UIImageView alloc]initWithImage:[UIImage imageNamed:@"Line"]];
//        [self.view addSubview:imageView];
//        [imageView mas_makeConstraints:^(MASConstraintMaker *make) {
//            make.left.equalTo(10);
//            make.right.equalTo(-10);
//            make.top.equalTo(self.phoneTextField.mas_bottom).equalTo(12);
//        }];
        //第二种创建view制出下划线的视觉效果
        UIView *myview  = [[UIView alloc]init];
        [self.view addSubview:myview];
        myview.backgroundColor = [UIColor grayColor];
        [myview mas_makeConstraints:^(MASConstraintMaker *make) {
            make.left.equalTo(10);
            make.right.equalTo(-10);
            make.top.equalTo(self.phoneTextField.mas_bottom).offset(12);
            make.height.equalTo(1);
        }];

    }
  return _phoneTextField;
}
@end