移动按钮

先上效果图
github地址 https://github.com/1271284056/Moving-Buttons.git

1. 设置一个baseTag给每个按钮从100标记,可以通过 viewWithTag 方法获取按钮(tag为0时候是控制器的view)

ViewController.h

import "ViewController.h"
@interface ViewController (){
NSInteger totalNumer;
CGPoint nextPoint;//下一个按钮的位置
CGPoint valuePoint;//记录移动按钮的位置
}

ViewController.m

用九宫格算法创建9个按钮,给每一个按钮添加一个长按手势,移动按钮时候用(CGRectContainsPoint(btn2.frame, touchPoint)判断移动按钮和其它按钮的相对位置,如果移动到某一个按钮上面,用tag判断,实时移动其它按钮达成效果,代码如下:

• (void)longPress:(UIGestureRecognizer *)recongize{
  UIButton *btn = (UIButton *)recongize.view;
  for (UIButton *btn1 in self.view.subviews) {
  if (btn1 != btn) {
  //禁用没被选中按钮的手势
  btn1.userInteractionEnabled = NO;
  }
  }
  //取得手势的位置
  CGPoint touchPoint = [recongize locationInView:self.view];
  if (recongize.state == UIGestureRecognizerStateBegan) {
  //开始移动
  [UIView animateWithDuration:0.2 animations:^{
  btn.transform = CGAffineTransformMakeScale(1.3, 1.3);
  btn.alpha = 0.7;
  //把选中按钮放到最前面
  [self.view bringSubviewToFront:btn];
  valuePoint = btn.center;
  }]; }else if (recongize.state == UIGestureRecognizerStateChanged){//移动view
  btn.center = touchPoint;
  for (UIButton *btn2 in self.view.subviews) {
  //遍历按钮 如果某一个按钮frame包含移动的按钮
  if (CGRectContainsPoint(btn2.frame, touchPoint)&&btn2 != btn) {
  //开始按钮索引
  NSInteger startIndex = btn.tag - KBase_tag;
  //结束按钮索引
  NSInteger endIndex = btn2.tag - KBase_tag;

            if (endIndex > startIndex) {//往后移
                [UIView animateWithDuration:0.2 animations:^{
                    for (NSInteger i = startIndex+1; i<=endIndex; i++) {
                        //取出后面的每一个按钮
                        UIButton *button = (UIButton *)[self.view viewWithTag:i+KBase_tag];
                        //记录下一个按钮的中心位置
                        nextPoint = button.center;
                        //移动下一个按钮到上一个位置
                        button.center = valuePoint;
                        //把下一个按钮的位置保存成当前按钮位置
                        valuePoint = nextPoint;
                        //tag减少
                        button.tag--;
                        //修改title
                        [button setTitle:[NSString stringWithFormat:@"第%ld",button.tag] forState:UIControlStateNormal];
                    }
                    btn.tag = endIndex + KBase_tag;
                    [btn setTitle:[NSString stringWithFormat:@"第%ld",btn.tag] forState:UIControlStateNormal];
                }];
        }else {//往前移
                [UIView animateWithDuration:0.2 animations:^{
                    for (NSInteger i = startIndex-1; i>=endIndex; i--) {
                        UIButton * button3 = (UIButton *)[self.view viewWithTag:i+KBase_tag];
                        nextPoint = button3.center;
                        button3.center = valuePoint;
                        valuePoint = nextPoint;
                        button3.tag++;
                        [button3 setTitle:[NSString stringWithFormat:@"第%ld",button3.tag] forState:UIControlStateNormal];
                    }
                    btn.tag = endIndex+KBase_tag;
                    [btn setTitle:[NSString stringWithFormat:@"第%ld",btn.tag] forState:UIControlStateNormal];
                }];
            }
        }
    } }else if (recongize.state == UIGestureRecognizerStateEnded){
    //移动结束
    for (UIButton * bt in self.view.subviews) {
        if (bt!=btn) {
            bt.userInteractionEnabled = YES;
        }
    }
    // 结束时候恢复view的外观（放大，改变颜色等）
    [UIView animateWithDuration:0.2 animations:^{
        btn.transform = CGAffineTransformMakeScale(1.0, 1.0);
        btn.alpha = 1;
        btn.center = valuePoint;
    }];
  

  }
  }