iOS实现简易抽屉效果、双边抽屉效果

本文实例为大家分享了ios实现抽屉效果的全部代码，供大家参考，具体内容如下

ios实现简易抽屉效果，代码：

@interface viewcontroller () {
 uiview* _leftview;
}
 
@end
 
@implementation viewcontroller
 
- (void)viewdidload {
 [super viewdidload];
 // do any additional setup after loading the view, typically from a nib.
  
 _leftview = [[uiview alloc] init];
 //把左侧边的view先隐藏
 _leftview.frame = cgrectmake(-200, 0, 200, self.view.frame.size.height);
 _leftview.backgroundcolor = [uicolor greencolor];
 [self.view addsubview:_leftview];
  
 uipangesturerecognizer* pan = [[uipangesturerecognizer alloc] initwithtarget:self action:@selector(handlepan:)];
 [self.view addgesturerecognizer:pan];
}
 
- (void)handlepan:(uipangesturerecognizer*) recognizer {
 cgpoint translation = [recognizer translationinview:self.view];
 //增量后的x坐标位置
 cgfloat xresult = translation.x + _leftview.frame.origin.x;
  
 //向右
 if (translation.x >= 0) {
  //leftview已全部拉出，则无法再向右
  if (_leftview.frame.origin.x >= 0 || xresult >= 0) {
   _leftview.frame = cgrectmake(0, 0, 200, self.view.frame.size.height);
    
   return;
  }
 } else if (translation.x < 0) {//向左
  //leftview已全部收回，则无法再向左
  if (_leftview.frame.origin.x <= -200 || xresult <= -200) {
   _leftview.frame = cgrectmake(-200, 0, 200, self.view.frame.size.height);
   return;
  }
 }
  
 cgrect frame = _leftview.frame;
 frame.origin.x += translation.x;
 _leftview.frame = frame;
  
 //清空移动的距离，这是关键
 [recognizer settranslation:cgpointzero inview:recognizer.view];
  
 //做弹回效果，以中轴为界限
 if (recognizer.state == uigesturerecognizerstateended) {
  if (_leftview.frame.origin.x > -100) {
   [self closeview:no];
  } else {
   [self closeview:yes];
  }
 }
}
 
- (void)closeview:(bool)close {
 if (close) {
  [self moveview:cgrectmake(-200, 0, 200, self.view.frame.size.height)];
 } else {
  [self moveview:cgrectmake(0, 0, 200, self.view.frame.size.height)];
 }
}
 
- (void)moveview:(cgrect)frame {
 [uiview animatewithduration:0.3 animations:^{
  _leftview.frame = frame;
 } completion:^(bool finished) {
   
 }];
}

ios实现双边抽屉效果，代码：

#import "pathview.h"
#import "uiview+additions.h"
 
@implementation pathview
 
- (instancetype)init {
 self = [super init];
 if (self) {
  [self setupgesturerecognizer];
 }
 return self;
}
 
- (void)setupgesturerecognizer {
 uipangesturerecognizer* pan = [[uipangesturerecognizer alloc] initwithtarget:self action:@selector(handlepan:)];
 [self addgesturerecognizer:pan];
}
 
- (void)handlepan:(uipangesturerecognizer*)recognizer {
 cgpoint translation = [recognizer translationinview:self];
  
 cgfloat xresult = translation.x + self.left;
  
 if (translation.x >= 0) {//向右
  if (self.left >= _leftwidth || xresult >= _leftwidth) {
   self.frame = cgrectmake(_leftwidth, 0, self.width, self.height);
   return;
  }
 }
 else if (translation.x < 0) {//向左
  if (self.left <= -_rightwidth || xresult <= -_rightwidth) {
   self.frame = cgrectmake(-_rightwidth, 0, self.width, self.height);
   return;
  }
 }
  
 self.left += translation.x;
  
 if (recognizer.state == uigesturerecognizerstateended) {
  if (self.left > _leftwidth / 2) {
   [self openleft:yes openright:no];
  }
   
  else if (self.left < -(_rightwidth / 2)) {
   [self openleft:no openright:yes];
  }
   
  else {
   [self openleft:no openright:no];
  }
 }
  
 //清空移动的距离
 [recognizer settranslation:cgpointzero inview:recognizer.view];
}
 
- (void)openleft:(bool)left openright:(bool)right {
 if (!left && !right) {
  [self moveview:cgrectmake(0, 0, self.width, self.height)];
   
 } else if (!left && right) {
  [self moveview:cgrectmake(-_rightwidth, 0, self.width, self.height)];
   
 } else if (left && !right) {
  [self moveview:cgrectmake(_leftwidth, 0, self.width, self.height)];
   
 }
}
 
- (void)moveview:(cgrect)frame {
 [uiview animatewithduration:0.3 animations:^{
  self.frame = frame;
 } completion:^(bool finished) {
   
 }];
}

上面是实现的具体内容，所以不做多少注释，只不过把手势移到view里面，让view自己改变自己的frame；再有就是添加了两个属性，来指定左右两边各自抽屉抽出的宽度，某一边不需要，只要设置为0就好了。

以上就是本文的全部内容，希望能够帮助大家顺利实现ios抽屉效果。