Masonry(第三方库)的使—代码实现屏幕适配

#import"Masonry"

实现效果图

- (void)viewDidLoad {
    [super viewDidLoad];
    // Do any additional setup after loading the view from its nib.
    [self testBasicLayout];
    [self testThreeLayout];
}
- (void)testThreeLayout
{
    UIView *redView = [[UIView alloc] init];
    redView.backgroundColor = [UIColor redColor];
    [self.view addSubview:redView];
    
    UIView *blueView = [[UIView alloc] init];
    blueView.backgroundColor = [UIColor blueColor];
    [self.view addSubview:blueView];
    
    UIView *greenView = [[UIView alloc] init];
    greenView.backgroundColor = [UIColor greenColor];
    [self.view addSubview:greenView];
    
    [redView mas_makeConstraints:^(MASConstraintMaker *make) {
        make.top.mas_equalTo(50);
        make.left.mas_equalTo(50);
        make.right.mas_equalTo(-50);
        make.height.mas_equalTo(100);
    }];
    [blueView mas_makeConstraints:^(MASConstraintMaker *make) {
        make.top.mas_equalTo(redView.mas_bottom).offset(50);//偏移量 默认0
        make.left.mas_equalTo(50);
        make.height.mas_equalTo(100);
        //make.width.mas_equalTo(100);
    }];
    [greenView mas_makeConstraints:^(MASConstraintMaker *make) {
        make.top.mas_equalTo(redView.mas_bottom).offset(50);
        make.right.mas_equalTo(-50);
        make.height.mas_equalTo(100);
        make.width.mas_equalTo(100);
        
        //间隔固定，宽度相等
        make.left.mas_equalTo(blueView.mas_right).offset(50);
        make.width.mas_equalTo(blueView.mas_width);
    }];
}

- (void)testBasicLayout
{
    //靠右对齐，100x100，top-50 right-50
    UIView *redView = [[UIView alloc] init];
    redView.backgroundColor = [UIColor redColor];
    [self.view addSubview:redView];
    //block重要参数：mark参数，设置make的属性。控制布局
    /*
    [redView mas_makeConstraints:^(MASConstraintMaker *make) {
        make.width.mas_equalTo(100);
        make.height.mas_equalTo(100);
        make.top.mas_equalTo(50);
        make.right.mas_equalTo(-50);
        
    }];
     */
    [redView mas_makeConstraints:^(MASConstraintMaker *make) {
        make.top.mas_equalTo(50);
        make.left.mas_equalTo(50);
        make.right.mas_equalTo(-50);
        make.height.mas_equalTo(100);
    }];
}