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iOS如何用100行代码实现简单的抽屉效果

2019年07月24日  | 移动技术网移动技术  | 我要评论

前言

ios中抽屉效果的简单实现现在很多应用中都使用到了，网上也有很多了例子，本文主要是通过简单的一些代码来实现的，有需要的可以一起学习学习。

下面是效果图

示例代码如下

#import <uikit/uikit.h>

@interface mainviewcontroller : uiviewcontroller
+ (instancetype)mainviewcontrollerwithleftviewcontroller:(uiviewcontroller *)leftviewcontroller withmainpageviewcontroller:(uiviewcontroller *)mainpageviewcontroller;
@end
#import "mainviewcontroller.h"

#define kwidth self.view.frame.size.width
#define kheight self.view.frame.size.height

@interface mainviewcontroller ()
@property (nonatomic,strong)uiviewcontroller *leftvc;
@property (nonatomic,strong)uiviewcontroller *centervc;
@property (nonatomic,assign)bool isslider;
@property (nonatomic,strong)uiview *corverview;
@end


@implementation mainviewcontroller
+ (instancetype)mainviewcontrollerwithleftviewcontroller:(uiviewcontroller *)leftviewcontroller withmainpageviewcontroller:(uiviewcontroller *)mainpageviewcontroller{

  mainviewcontroller *mainvc = [[mainviewcontroller alloc] init];
  mainvc.leftvc = leftviewcontroller;
  mainvc.centervc = mainpageviewcontroller;
  return mainvc;
}
- (void)viewdidload{
  [super viewdidload];
  self.isslider = no;
  self.view.backgroundcolor = [uicolor whitecolor];
  [self addchildviewcontroller:self.leftvc];
  [self.view addsubview:self.leftvc.view];
  [self addchildviewcontroller:self.centervc];
  [self.view addsubview:self.centervc.view];
  // 给左视图和主视图添加手势
  [self addgestureforview];
}
// 给主视图添加遮盖
- (void)addcorverview{
  if (self.corverview) {
    [self.corverview removefromsuperview];
    self.corverview = nil;
  }
  self.corverview = [[uiview alloc] initwithframe:self.centervc.view.bounds];
  _corverview.backgroundcolor = [[uicolor blackcolor] colorwithalphacomponent:0.0];
  [self.centervc.view addsubview:self.corverview];
}
// 移除主视图遮盖
- (void)removecoverview{
  if (self.corverview) {
    [self.corverview removefromsuperview];
    self.corverview = nil;
  }
}
// 给左视图和主视图添加手势
- (void)addgestureforview{
  uiswipegesturerecognizer *rightgesture = [[uiswipegesturerecognizer alloc] initwithtarget:self action:@selector(swiperightaction:)];
  rightgesture.direction = uiswipegesturerecognizerdirectionright;
  [self.centervc.view addgesturerecognizer:rightgesture];
  uiswipegesturerecognizer *leftgesture = [[uiswipegesturerecognizer alloc] initwithtarget:self action:@selector(swipeleftaction:)];
  leftgesture.direction = uiswipegesturerecognizerdirectionleft;
  [self.centervc.view addgesturerecognizer:leftgesture];
  uiswipegesturerecognizer *leftvcleftswipegesture = [[uiswipegesturerecognizer alloc] initwithtarget:self action:@selector(leftvcleftswipeaction:)];
  leftvcleftswipegesture.direction = uiswipegesturerecognizerdirectionleft;
  [self.leftvc.view addgesturerecognizer:leftvcleftswipegesture];
}
- (void)swiperightaction:(id)sender{
  [self moveview:self.centervc.view scale:0.8 panvalue:kwidth];
  self.isslider = yes;
  [self addcorverview];
}
- (void)swipeleftaction:(id)sender{
  [self moveview:self.centervc.view scale:1 panvalue:kwidth / 2];
  self.isslider = no;
  [self removecoverview];
}
- (void)leftvcleftswipeaction:(id)sender{
  [self moveview:self.centervc.view scale:1 panvalue:kwidth / 2];
  self.isslider = no;
  [self removecoverview];
}
// 平移和缩放一个视图
- (void)moveview:(uiview *)view scale:(cgfloat)scale panvalue:(cgfloat)value{
  [uiview beginanimations:nil context:nil];
  view.transform = cgaffinetransformscale(cgaffinetransformidentity,scale,scale);
  view.center = cgpointmake(value, view.center.y);
  [uiview commitanimations];
}
@end

总结

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