iOS抽屜效果開(kāi)發(fā)案例分享

更新時(shí)間：2016年04月08日 14:43:51 作者：神戶牛肉

這篇文章主要為大家分享了iOS抽屜效果開(kāi)發(fā)案例，文中示例代碼介紹的非常詳細(xì)，具有一定的參考價(jià)值，感興趣的小伙伴們可以參考一下

本文實(shí)例為大家分享了iOS抽屜效果開(kāi)發(fā)實(shí)例，供大家參考，具體內(nèi)容如下

在顯示在窗口的控制器上添加三個(gè)view（如果只需要往一邊滑動(dòng)就只加2個(gè)view）

先聲明三個(gè)view

#import "ViewController.h"
 
@interface ViewController ()
@property(nonatomic, weak) UIView *mainV;
@property(nonatomic, weak) UIView *leftV;
@property(nonatomic, weak) UIView *rightV;
@end

添加view到控制器view上

#pragma mark - 添加子控件
- (void)setUpChildViews {  
 UIView *leftV = [[UIView alloc]initWithFrame:self.view.bounds];  
 leftV.backgroundColor = [UIColor orangeColor];  
 [self.view addSubview:leftV];  
 _leftV = leftV;  
 UIView *rightV = [[UIView alloc]initWithFrame:self.view.bounds];  
 rightV.backgroundColor = [UIColor groupTableViewBackgroundColor];  
 [self.view addSubview:rightV];  
 _rightV = rightV;  
 UIView *mainV = [[UIView alloc]initWithFrame:self.view.bounds];  
 mainV.backgroundColor = [UIColor yellowColor];  
 [self.view addSubview:mainV];  
 _mainV = mainV;
}
 
- (void)viewDidLoad {
 [super viewDidLoad];
  
 //添加子控件
 [self setUpChildViews];
  
 //添加Pan手勢(shì)
 UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc]initWithTarget:self action:@selector(pan:)];
  
 [self.view addGestureRecognizer:pan];
  
 //添加點(diǎn)按手勢(shì)，在主視圖上任意位置點(diǎn)擊回到屏幕開(kāi)始位置
 UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(tap)];
  
 [self.view addGestureRecognizer:tap];
  
}

#pragma mark - 手勢(shì)識(shí)別方法
#define targetL -230
#define targetR 200
#define screenW [UIScreen mainScreen].bounds.size.width
- (void)pan:(UIPanGestureRecognizer *)pan {
  
 //獲取手勢(shì)移動(dòng)的位置
 CGPoint tranP = [pan translationInView:self.view];
  
 //獲取x的偏移量
 CGFloat offsetX = tranP.x;
  
 //修改mainV的frame
 _mainV.frame = [self frameWithOffsetX:offsetX];
  
 //判斷mainV的x是否大于0
 [self observeValueForKeyPath:nil ofObject:nil change:nil context:nil];
  
 //復(fù)位
 [pan setTranslation:CGPointZero inView:self.view];
  
 //判斷當(dāng)手勢(shì)結(jié)束的時(shí)候，定位
 if (pan.state == UIGestureRecognizerStateEnded) {
   
  CGFloat target = 0;
   
  if (_mainV.frame.origin.x > screenW * 0.5) {
   //定位到右邊
   target = targetR;
  }else if(CGRectGetMaxX(_mainV.frame) < screenW * 0.5) {
   //定位到左邊
   target = targetL;
  }
   
  //獲取X軸需要移動(dòng)的偏移量
  CGFloat offsetX = target - _mainV.frame.origin.x;
   
  [UIView animateWithDuration:0.25 animations:^{
    
   _mainV.frame = target == 0 ? self.view.bounds : [self frameWithOffsetX:offsetX];
 
  }];
   
 }
  
}

- (void)tap {
  
 [UIView animateWithDuration:0.25 animations:^{
  _mainV.frame = self.view.bounds;
 }];
  
}

#define kMaxY 80
#pragma mark - 根據(jù)offsetX計(jì)算mainV的frame
- (CGRect)frameWithOffsetX:(CGFloat)offsetX {
  
 //獲取上一次的frame
 CGRect frame = _mainV.frame;
  
 //獲取屏幕的高度
 CGFloat screenH = [UIScreen mainScreen].bounds.size.height;
  
 //獲取屏幕的寬度
 //CGFloat screenW = [UIScreen mainScreen].bounds.size.width;
  
 //X軸平移一點(diǎn)對(duì)應(yīng)Y軸需要平移的距離
 CGFloat offsetY = offsetX * kMaxY / screenW;
  
 //獲取上一次的高度
 CGFloat preH = frame.size.height;
  
 //獲取上一次的寬度
 CGFloat preW = frame.size.width;
  
 //獲取當(dāng)前高度
 CGFloat curH = preH - 2 * offsetY;
 //如果是向左滑動(dòng)
 if(frame.origin.x < 0) {
  curH = preH + 2 * offsetY;
 }
  
 //獲取尺寸的縮放比例
 CGFloat scale = curH / preH;
  
 //獲取當(dāng)前寬度
 CGFloat curW = preW * scale;
  
 //獲取當(dāng)前x
 frame.origin.x += offsetX;
  
 //獲取當(dāng)前y
 CGFloat y = (screenH - curH) / 2;
 frame.origin.y = y;
  
 frame.size.width = curW;
 frame.size.height = curH;
  
 return frame;
  
}

- (void)observeValueForKeyPath:(NSString *)keyPath ofObject:(id)object change:(NSDictionary<NSString *,id> *)change context:(void *)context {
  
 if(_mainV.frame.origin.x > 0) {//往右邊滑動(dòng)
  _rightV.hidden = YES;
 }else if(_mainV.frame.origin.x < 0) {//往左邊滑動(dòng)
  _rightV.hidden = NO;
 }
  
}

如果想要在mainV主視圖中顯示tableView，就新創(chuàng)建一個(gè)TableViewController，在這里面顯示tableView的數(shù)據(jù)，

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
 
 return 30;
}
 
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
  
  
 static NSString *ID = @"cell";
  
 UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:ID];
  
 if(cell == nil) {
  cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleDefault reuseIdentifier:ID];
 }
  
 cell.textLabel.text = [NSString stringWithFormat:@"第%ld行", indexPath.row];
  
 return cell;
}

再創(chuàng)建一個(gè)在storyboard中顯示的控制器XXMainViewController，繼承自實(shí)現(xiàn)了抽屜效果的ViewController，并且在storyboard中將class改為這個(gè)控制的類名，還要將顯示tableView的控制成為他的子控制器

- (void)viewDidLoad {
 [super viewDidLoad];
  
 XXViewController *vc = [[XXViewController alloc]init];
 vc.view.frame = self.view.bounds;
  
 //讓vc成為主視圖控制器的子控制器
 [self addChildViewController:vc];
  
 //主視圖展示tableView
 [self.mainV addSubview:vc.view];
  
}

為了在XXMainViewController中只能訪問(wèn)mainV而不能修改他的值，所以將子控件的view暴露在ViewController.h中，并添加read-only

#import <UIKit/UIKit.h>
 
@interface ViewController : UIViewController
@property(nonatomic, weak, readonly) UIView *mainV;
@property(nonatomic, weak, readonly) UIView *leftV;
@property(nonatomic, weak, readonly) UIView *rightV;
@end

運(yùn)行效果圖：