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原创【iOS】高斯模糊

UIImageView *bgImg = [[UIImageView alloc]initWithFrame:CGRectMake(0, 20, SCREEN_WIDTH, 187)];bgImg.image = [UIImage imageNamed:@"启动图标最终版"];bgImg.contentMode = UIViewContentModeScaleAspectFill;bgImg.clipsToBounds = YES;[self.view addSubview:bgImg];UIBl

2020-10-19 10:20:01 965

原创【iOS】关于 UICollectionView 的自定义布局

闲来没事，做了个 UICollectionView 的圆形布局，效果图如下#控制器代码如下//// ViewController.m// CollectionViewTest//// Created by 黄瑞 on 2017/5/24.// Copyright © 2017年 CoderHuang. All rights reserved.//#import "ViewController.h"#import "MyLayout.h"#import "MyCollecti

2020-10-19 10:19:32 350

原创【iOS】UIImageView显示放大后的图片时模糊的问题

想放大后不进行模糊处理的话，需要更改一个属性 UIImageView *imageView = [[UIImageView alloc] init]; CALayer *layer = imageView.layer; layer.magnificationFilter = @"nearest";文档中对 magnificationFilter 属性的解释如下其中typedef NSString * CALayerContentsFilter NS_STRING_ENU..

2020-10-19 10:18:38 771

原创【iOS】一个简单的人脸跟踪Demo

1、sessionView - 相机画面的容器Viewself.detector - 脸部特征识别器- (void)viewDidLoad { [super viewDidLoad]; self.sessionView = [[UIView alloc] initWithFrame:self.view.bounds]; [self.view addSubview:self.sessionView]; self.faceView = [[UIImage

2020-10-19 10:17:55 777 2

原创【数据结构】【iOS】二叉树的遍历

二叉树的遍历方式有三种1、前序遍历NLR（Preorder Traversal，先序遍历2、中序遍历LNR（Inorder Traversal）3、后序遍历LRN（Postorder Traversal）代码Swiftclass TreeNode { var val: Int var left: TreeNode? var right: TreeNode? init(_ val: Int) { self.val = val self

2020-10-19 10:17:08 660

原创【iOS】当我们在application:DidFinishLaunchWithOptions:中返回NO时会发生什么

先给出官方文档解释The return result from this application:didFinishLaunchingWithOptions: is combined with the return result from the application:willFinishLaunchingWithOptions: method to determine if a URL should be handled. If either method returns NO, the URL is

2020-10-19 10:16:01 763