UIStackView的使用

#import "ViewController.h"

@interface ViewController ()

@property (nonatomic, strong) UIStackView *horizontalStackView;

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    self.navigationController.navigationBarHidden = YES;
    self.view.backgroundColor = [UIColor lightGrayColor];
    
    [self.view addSubview:self.horizontalStackView];
    self.horizontalStackView.frame = CGRectMake(10, 100, self.view.frame.size.width-20, 100);
}

- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
    UILabel *lbl = [self textLbl];
    
    [self.horizontalStackView addArrangedSubview:lbl];
    [UIView animateWithDuration:1 animations:^{
        [self.horizontalStackView layoutIfNeeded];
    }];
}

- (UILabel *)textLbl {
    UILabel *lbl = [[UILabel alloc] init];
    lbl.backgroundColor = [[UIColor redColor] colorWithAlphaComponent:0.1];
    lbl.text = @"文字";
    return lbl;
}

- (UIStackView *)horizontalStackView {
    if (!_horizontalStackView) {
        _horizontalStackView = [[UIStackView alloc] init];
        _horizontalStackView.axis = UILayoutConstraintAxisHorizontal;
        _horizontalStackView.distribution = UIStackViewDistributionFillEqually;
        _horizontalStackView.spacing = 10;
        _horizontalStackView.alignment = UIStackViewAlignmentFill;
        _horizontalStackView.backgroundColor = [UIColor yellowColor];
    }
    return _horizontalStackView;
}

@end

#import "ViewController.h"

@interface ViewController ()

@property (nonatomic, strong) UIStackView *verticalStackView;

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    self.navigationController.navigationBarHidden = YES;
    self.view.backgroundColor = [UIColor lightGrayColor];
    
    [self.view addSubview:self.verticalStackView];
    self.verticalStackView.frame = CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height);
}

- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
    UILabel *lbl = [self textLbl];
    
    [self.verticalStackView addArrangedSubview:lbl];
    [UIView animateWithDuration:1 animations:^{
        [self.verticalStackView layoutIfNeeded];
    }];
}

- (UILabel *)textLbl {
    UILabel *lbl = [[UILabel alloc] init];
    lbl.backgroundColor = [[UIColor redColor] colorWithAlphaComponent:0.1];
    lbl.text = @"文字";
    return lbl;
}

- (UIStackView *)verticalStackView {
    if (!_verticalStackView) {
        _verticalStackView = [[UIStackView alloc] init];
        _verticalStackView.axis = UILayoutConstraintAxisVertical;
        _verticalStackView.distribution = UIStackViewDistributionFillEqually;
        _verticalStackView.spacing = 10;
        _verticalStackView.alignment = UIStackViewAlignmentFill;
        _verticalStackView.backgroundColor = [UIColor yellowColor];
    }
    return _verticalStackView;
}

@end