IOS开发仿微信右侧弹出视图实现

IOS开发仿微信右侧弹出视图实现

微信首页的+号,点击之后会弹出一个更多的视图,这个视图如何实现呢?

实现该效果可能需要以下技术要点:

1.图片拉伸,通过拉伸图片的中间的较小区域来保持图片的边上的形状

2.仿射变换,用到仿射变换的缩放,平移和合并,视图动画

3.navigationBar的样式设置

实现效果,如下:

本Demo图片来源微信安装包解压得到的图片

实现代码:

// 
// ViewController.m 
// appXX-微信更多工具栏 
// 
// Created by MRBean on 15/7/27. 
// Copyright (c) 2015年 yangbin. All rights reserved. 
// 
 
#import "ViewController.h" 
#define kScreenWidth self.view.bounds.size.width 
@interface ViewController () 
@property(strong,nonatomic)UIImageView *imageView; 
@end 


@implementation ViewController

- (void)viewDidLoad {
  [super viewDidLoad];
  
//初始化ImageView 
  UIImage *image = [UIImage imageNamed:@"More"]; 
  NSLog(@"%f ,%f",image.size.width,image.size.height); 
  UIImage *stretchImage = [image resizableImageWithCapInsets:UIEdgeInsetsMake(31, 36, 30, 33)];//拉伸图片 
  _imageView = [[UIImageView alloc]init]; 
  _imageView.frame = CGRectMake(kScreenWidth-100, 64, 100, 150); 
  _imageView.image = stretchImage; 
//仿射变换,矩阵变换 
 CGAffineTransform smaller = CGAffineTransformMakeScale(0.01, 0.01);//比例缩放 
 CGAffineTransform rightUpMove = CGAffineTransformMakeTranslation(_imageView.frame.size.width/2, -_imageView.frame.size.height/2);//平移 
 CGAffineTransform cat = CGAffineTransformConcat(smaller, rightUpMove);//合并两个矩阵变换 
 _imageView.transform = cat;//设置_imageView的仿射变换 
_imageView.alpha = 0;//透明度 
[self.view addSubview:_imageView]; 
_imageView.hidden = YES; 
self.navigationController.navigationBar.barStyle = UIBarStyleBlack;//设置navigationBar的样式 
self.navigationController.navigationBar.tintColor = [UIColor whiteColor];//设置navigationBar字体或者镂空图的颜色 

}
//点击右侧的按钮
- (IBAction)tapAdd:(UIBarButtonItem *)sender 
{ 
  if (_imageView.hidden) 
  { 
    CGAffineTransform larger = CGAffineTransformMakeScale(1, 1);//放大 
    _imageView.hidden = NO;//显示视图 
    [UIView animateWithDuration:0.2 animations:^{ 
      _imageView.transform = larger; 
      _imageView.alpha = 1; 

    }]; 
  } 
  else 
  { 
    CGAffineTransform smaller = CGAffineTransformMakeScale(0.01, 0.01);//缩小 
    CGAffineTransform rightUpMove = CGAffineTransformMakeTranslation(_imageView.frame.size.width/2, -_imageView.frame.size.height/2);//移动 
    CGAffineTransform cat = CGAffineTransformConcat(smaller, rightUpMove);//合并transform 
    [UIView animateWithDuration:0.2 animations:^{ 
      _imageView.transform = cat; 
      } completion:^(BOOL finished) { 
      _imageView.hidden = YES; 
      _imageView.alpha = 0; 

    }]; 
  } 
 } 

- (void)didReceiveMemoryWarning { 
  [super didReceiveMemoryWarning]; 
  // Dispose of any resources that can be recreated. 
} 
@end

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