iOS抽屜效果開發案例分享_IOS

本文執行個體為大家分享了iOS抽屜效果開發執行個體，供大家參考，具體內容如下

在顯示在視窗的控制器上添加三個view（如果只需要往一邊滑動就只加2個view）

先聲明三個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 - 添加子控制項- (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];     //添加子控制項  [self setUpChildViews];     //添加Pan手勢  UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc]initWithTarget:self action:@selector(pan:)];     [self.view addGestureRecognizer:pan];     //添加點按手勢，在主視圖上任意位置點擊回到螢幕開始位置  UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(tap)];     [self.view addGestureRecognizer:tap];   }

#pragma mark - 手勢識別方法#define targetL -230#define targetR 200#define screenW [UIScreen mainScreen].bounds.size.width- (void)pan:(UIPanGestureRecognizer *)pan {     //擷取手勢移動的位置  CGPoint tranP = [pan translationInView:self.view];     //擷取x的位移量  CGFloat offsetX = tranP.x;     //修改mainV的frame  _mainV.frame = [self frameWithOffsetX:offsetX];     //判斷mainV的x是否大於0  [self observeValueForKeyPath:nil ofObject:nil change:nil context:nil];     //複位  [pan setTranslation:CGPointZero inView:self.view];     //判斷當手勢結束的時候，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;    }         //擷取X軸需要移動的位移量    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offsetX計算mainV的frame- (CGRect)frameWithOffsetX:(CGFloat)offsetX {     //擷取上一次的frame  CGRect frame = _mainV.frame;     //擷取螢幕的高度  CGFloat screenH = [UIScreen mainScreen].bounds.size.height;     //擷取螢幕的寬度  //CGFloat screenW = [UIScreen mainScreen].bounds.size.width;     //X軸平移一點對應Y軸需要平移的距離  CGFloat offsetY = offsetX * kMaxY / screenW;     //擷取上一次的高度  CGFloat preH = frame.size.height;     //擷取上一次的寬度  CGFloat preW = frame.size.width;     //擷取當前高度  CGFloat curH = preH - 2 * offsetY;  //如果是向左滑動  if(frame.origin.x < 0) {    curH = preH + 2 * offsetY;  }     //擷取尺寸的縮放比例  CGFloat scale = curH / preH;     //擷取當前寬度  CGFloat curW = preW * scale;     //擷取當前x  frame.origin.x += offsetX;     //擷取當前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    _rightV.hidden = YES;  }else if(_mainV.frame.origin.x < 0) {//往左邊滑動    _rightV.hidden = NO;  }   }

如果想要在mainV主視圖中顯示tableView，就新建立一個TableViewController，在這裡面顯示tableView的資料，

- (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;}

再建立一個在storyboard中顯示的控制器XXMainViewController，繼承自實現了抽屜效果的ViewController，並且在storyboard中將class改為這個控制的類名，還要將顯示tableView的控製成為他的子控制器

- (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mainV而不能修改他的值，所以將子控制項的view暴露在ViewController.h中，並添加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

運行效果圖：

以上就是本文的全部內容，希望對大家學習iOS程式設計有所協助。