JXStackView

JXStackView是一个栈式布局容器。

竖直布局：

#import "JXStackView.h"@interface ViewController ()@property (nonatomic, strong) UIScrollView *vScrollView;@property (nonatomic, strong) JXVerticalStackView *vStackView;@property (nonatomic, strong) UIScrollView *hScrollView;@property (nonatomic, strong) JXHorizontalStackView *hStackView;@end@implementation ViewController- (void)viewDidLoad{
[super viewDidLoad];
self.title = @"单击改变size，拖动删除";

self.navigationItem.rightBarButtonItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemAdd target:self action:@selector(onRightItem)];
self.navigationItem.leftBarButtonItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemRefresh target:self action:@selector(onLeftItem)];/* 竖直容器 */self.vScrollView = [[UIScrollView alloc] initWithFrame:self.view.bounds];
[self.view addSubview:self.vScrollView];

self.vStackView = [[JXVerticalStackView alloc] init];
[self.vScrollView addSubview:self.vStackView];// 高度初始化可为0，会自动计算；宽度需传值self.vStackView.frame = CGRectMake(0, 0, self.vScrollView.frame.size.width, 0);// size变化后回调__weak typeof(self) weakSelf = self;
[self.vStackView setDidChangeSize:^(CGSize size) {
weakSelf.vScrollView.contentSize = size;
}];// 添加子viewfor (NSInteger index = 0; index < 5; index ++)
{
[self.vStackView addSubview:[self generateRandomView]];
}
self.vStackView.contentSpacing = 10;
self.vStackView.alignment = JXVerticalStackViewAlignmentCenter;/* 水平容器 */self.hScrollView = [[UIScrollView alloc] initWithFrame:self.view.bounds];
[self.view addSubview:self.hScrollView];

self.hStackView = [[JXHorizontalStackView alloc] init];
[self.hScrollView addSubview:self.hStackView];// 宽度初始化可为0，会自动计算；高度需传值self.hStackView.frame = CGRectMake(0, 64, 0, 60);// size变化后回调[self.hStackView setDidChangeSize:^(CGSize size) {
weakSelf.hScrollView.contentSize = size;
}];// 添加子viewfor (NSInteger index = 0; index < 5; index ++)
{
[self.hStackView addSubview:[self generateRandomView]];
}
self.hStackView.contentSpacing = 6;
self.hStackView.alignment = JXHorizontalStackViewAlignmentCenter;// 切换self.vScrollView.hidden = NO;
self.hScrollView.hidden = !self.vScrollView.hidden;
}

- (void)onRightItem{if (!self.vScrollView.hidden)
{
[self.vStackView addSubview:[self generateRandomView]];
}else if (!self.hScrollView.hidden)
{
[self.hStackView addSubview:[self generateRandomView]];
}
}

- (void)onLeftItem{
self.vScrollView.hidden = !self.vScrollView.hidden;
self.hScrollView.hidden = !self.vScrollView.hidden;
}

- (UIView *)generateRandomView{
UIView *view = [[UIView alloc] initWithFrame:CGRectMake(0, 0, arc4random_uniform(60) + 30, arc4random_uniform(60) + 30)];
view.backgroundColor = [UIColor colorWithRed:arc4random_uniform(255) / 255.0 green:arc4random_uniform(255) / 255.0 blue:arc4random_uniform(255) / 255.0 alpha:1.0];

view.userInteractionEnabled = YES;
UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(onSingleTap:)];
[view addGestureRecognizer:singleTap];

UIPanGestureRecognizer *panTap = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(onPanTap:)];
[view addGestureRecognizer:panTap];return view;
}

- (void)onSingleTap:(UITapGestureRecognizer *)tap{
UIView *view = tap.view;CGRect frame = view.frame;
frame.size = CGSizeMake(arc4random_uniform(60) + 30, arc4random_uniform(60) + 30);
view.frame = frame;
}

- (void)onPanTap:(UITapGestureRecognizer *)tap{
UIView *view = tap.view;
[view removeFromSuperview];
}@end

效果图一：

效果图二