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iOS小知识汇总

== [ UIScreen mainScreen ]. scale ) || !...IS_OS_8_OR_LATER )) //#define IS_STANDARD_IPHONE_6 ( IS_IPHONE && [[ UIScreen mainScreen ] bounds ]....mainScreen ]. scale ) //#define IS_ZOOMED_IPHONE_6 ( IS_IPHONE && [[ UIScreen mainScreen ] bounds ].... size . height == 568.0 && IS_OS_8_OR_LATER && [ UIScreen mainScreen ]. nativeScale > [ UIScreen...mainScreen ]. scale ) //#define IS_STANDARD_IPHONE_6_PLUS ( IS_IPHONE && [[ UIScreen mainScreen ] bounds

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苹果一倍图尺寸(iphone11pro屏幕尺寸)

识别手机机型使用的是几倍图，一般通过这个值来识别：[UIScreen mainScreen].scale。...准确的倍图计算公式是：round(屏幕截图宽度/[[UIScreen mainScreen] bounds].size.width)。...mainScreen] bounds].size.height）的四舍五入的整数。...812.000000, [UIScreen mainScreen].scale:2.000000），所以它是用2倍图。...].scale, [UIScreen mainScreen].scale, LL_iPhoneX?

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iOS开发中常用的宏

--- //NavBar高度 #define NavigationBar_HEIGHT 44 //获取屏幕宽度、高度 #define SCREEN_WIDTH ([UIScreen mainScreen...].bounds.size.width) #define SCREEN_HEIGHT ([UIScreen mainScreen].bounds.size.height) #define ZJKeyWindow...CGSizeEqualToSize(CGSizeMake(1242, 2208), [[UIScreen mainScreen] currentMode].size) : NO) #define ZJScreen_Bounds...[UIScreen mainScreen].bounds #define ZJScreen_Height [UIScreen mainScreen].bounds.size.height #define...ZJScreen_Width [UIScreen mainScreen].bounds.size.width 颜色 //----------------------颜色类---------------

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UIPickerView显示和隐藏的动画

animateWithDuration:0.3 animations:^{ if (hidden) { view.frame = CGRectMake(0, [UIScreen mainScreen...].bounds.size.height, [UIScreen mainScreen].bounds.size.width, view.bounds.size.height); }...else { [view setHidden:hidden]; view.frame = CGRectMake(0, [UIScreen mainScreen...].bounds.size.height - view.bounds.size.height, [UIScreen mainScreen].bounds.size.width, view.bounds.size.height

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iOS 判断设备型号、屏幕尺寸、系统版本、设备朝向

userInterfaceIdiom] == UIUserInterfaceIdiomPhone) #define UI_IS_IPHONE4 (UI_IS_IPHONE && [[UIScreen mainScreen...] bounds].size.height < 568.0) #define UI_IS_IPHONE5 (UI_IS_IPHONE && [[UIScreen mainScreen...] bounds].size.height == 568.0) #define UI_IS_IPHONE6 (UI_IS_IPHONE && [[UIScreen mainScreen...] bounds].size.height == 667.0) #define UI_IS_IPHONE6PLUS (UI_IS_IPHONE && [[UIScreen mainScreen...] bounds].size.height == 736.0 || [[UIScreen mainScreen] bounds].size.width == 736.0) // Both orientations

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玩转iOS转场动画原

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对iPhone手机型号进行判断

CGSizeEqualToSize(CGSizeMake(1242,2208), [[UIScreen mainScreen] currentMode].size) : NO) #define IS_IPhone6...CGSizeEqualToSize(CGSizeMake(750,1334), [[UIScreen mainScreen] currentMode].size) : NO) #define IS_IPhone4...CGSizeEqualToSize(CGSizeMake(640,960), [[UIScreen mainScreen] currentMode].size) : NO) #define IS_IPHONE...CGSizeEqualToSize(CGSizeMake(640, 1136), [[UIScreen mainScreen] currentMode].size) : NO)

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iOS获取屏幕宽高、设备型号、系统版本信息介绍1、获取屏幕的宽高2、获取设备的型号3、获取系统版本

获取屏幕宽、高的方法如下： // 设备宽度 [UIScreen mainScreen].bounds.size.width // 设备高度 [UIScreen mainScreen]...一般来说我们在pch文件里将其设置为宏，这样在每个地方就都可以调用了，就不用每次都用这么长一串代码： //设备的宽高 #define SCREENWIDTH [UIScreen mainScreen...].bounds.size.width #define SCREENHEIGHT [UIScreen mainScreen].bounds.size.height 这样在需要用的地方直接使用宏...CGSizeEqualToSize(CGSizeMake(640, 1136), [[UIScreen mainScreen] currentMode].size) : NO) #define isiPhone6or6s...CGSizeEqualToSize(CGSizeMake(1242, 2208), [[UIScreen mainScreen] currentMode].size) : NO) 那么我只需要判断这几个值哪一个是

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iOS实现点击图片放大&长按保存图片

].bounds.size.width, [UIScreen mainScreen].bounds.size.height)]; [backgroundView setBackgroundColor...[UIView animateWithDuration:0.4 animations:^{ CGFloat y,width,height; y = ([UIScreen mainScreen...].bounds.size.height - image.size.height * [UIScreen mainScreen].bounds.size.width / image.size.width...) * 0.5; //宽度为屏幕宽度 width = [UIScreen mainScreen].bounds.size.width; //高度根据图片宽高比设置...height = image.size.height * [UIScreen mainScreen].bounds.size.width / image.size.width;

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UIScrollView 和 UIPageControl 实现启动滑动图

void) showScrollView{ UIScrollView *_scrollView = [[UIScrollView alloc] initWithFrame:[UIScreen mainScreen...UIScrollView 的显示内容的尺寸，有n张图要显示，就设置屏幕宽度*n ，这里假设要显示4张图 _scrollView.contentSize = CGSizeMake([UIScreen mainScreen...].bounds.size.width * 4, [UIScreen mainScreen].bounds.size.height); _scrollView.tag = 101;...{ UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake([UIScreen mainScreen...].bounds.size.width * i , 0, [UIScreen mainScreen].bounds.size.width, [UIScreen mainScreen].bounds.size.height

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html图片自适应div大小_未知宽高的div元素垂直水平居中

important;height:auto}%@",[UIScreen mainScreen].bounds.size.width-28,str]; NSMutableAttributedString...important;height:auto}%@",[UIScreen mainScreen].bounds.size.width,str]; NSMutableAttributedString...htmlString length])]; // CGSize contextSize = [htmlString boundingRectWithSize:(CGSize){[UIScreen mainScreen...NSStringDrawingUsesFontLeading context:nil].size; CGSize labelSize = [_detailLab sizeThatFits:CGSizeMake([UIScreen mainScreen

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iOS自带实现高斯模糊效果引iOS 7 UIToolbariOS 8 UIBlurEffect结

来实现这种效果，代码很简单： UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, [UIScreen mainScreen...].bounds.size.width, [UIScreen mainScreen].bounds.size.height)]; imageView.image = [UIImage imageNamed...UIVisualEffectView，代码如下： UIImageView *imageView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, [UIScreen mainScreen...].bounds.size.width, [UIScreen mainScreen].bounds.size.height)]; imageView.image = [UIImage imageNamed

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Flutter 中下载并保存图片为文件

image to disk', theme: ThemeData( primarySwatch: Colors.blue, ), home: const MainScreen...(), ); } } class MainScreen extends StatelessWidget { static const _url = 'https://dosomthings.com.../wp-content/uploads/2022/07/dc0a7e44e96647848177c8afd4bdabdd.png'; const MainScreen({super.key})...build(BuildContext context) { return MaterialApp( title: 'Save image to disk', home: MainScreen...(), ); } } class MainScreen extends StatelessWidget { static const _url = 'https://dosomthings.com

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ios textView跟随键盘的移动

{ [super viewDidLoad]; _textView = [[UITextView alloc]initWithFrame:CGRectMake(15,[UIScreen mainScreen...].bounds.size.height-55 , [UIScreen mainScreen].bounds.size.width-30, 50)]; _textView.delegate =...animateWithDuration:0.25 animations:^{ _textView.transform = CGAffineTransformMakeTranslation(0, -([UIScreen mainScreen

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controller如何拿到自定义view的点击事件？

PersonalCenterView *centerView = [[PersonalCenterView alloc]initWithFrame:CGRectMake(0, 88, [UIScreen mainScreen...PersonalCenterView *centerView = [[PersonalCenterView alloc]initWithFrame:CGRectMake(0, 88, [UIScreen mainScreen...PersonalCenterView *centerView = [[PersonalCenterView alloc]initWithFrame:CGRectMake(0, 88, [UIScreen mainScreen...PersonalCenterView *centerView = [[PersonalCenterView alloc]initWithFrame:CGRectMake(0, 88, [UIScreen mainScreen...PersonalCenterView *centerView = [[PersonalCenterView alloc]initWithFrame:CGRectMake(0, 88, [UIScreen mainScreen

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iOS在程序中控制系统的屏幕亮度

到了ios5.0以后将这个api开放给了开发者，这样我们就可以非常方更的更改系统屏幕的亮度，使用方法也很简单，如下：获取系统屏幕当前的亮度值 float value = [UIScreen mainScreen...].brightness; 设置系统屏幕的亮度值 [[UIScreen mainScreen] setBrightness:value];

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iOS开发·适配iPhone X相关的宏和方法

CGSizeEqualToSize(CGSizeMake(1125, 2436), [[UIScreen mainScreen] currentMode].size) : NO) 多行逻辑判断 //是否...instancesRespondToSelector:@selector(currentMode)]) {\ if (CGSizeEqualToSize(CGSizeMake(1125, 2436), [[UIScreen mainScreen...define kIs_iPhoneX (kSCREEN_WIDTH == 375.f && kSCREEN_HEIGHT == 812.f) #define kSCREEN_WIDTH ([UIScreen mainScreen...].bounds.size.width) #define kSCREEN_HEIGHT ([UIScreen mainScreen].bounds.size.height) 1.2 判断：方法方法：依据设备型号

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【iOS开发】使用 protocol 与 extension 来限制函数作用域

就会有下面这行代码 webview.frame = UIScreen.mainScreen().bounds 进一步地，我想把这个步骤封装为一个函数，因为比如这个页面屏幕旋转时，或者在其他页面，我都可能需要用到它...if view.isKindOfClass(UIWebView) || view.isKindOfClass(WKWebView) { view.frame = UIScreen.mainScreen...ExpandableView { func expandToFullView() } private func expand(view:UIView) { view.frame = UIScreen.mainScreen

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UI篇－关于单个页面屏幕旋转要注意的问题

self.navigationController.view.bounds.origin.x, self.navigationController.view.bounds.origin.y, [UIScreen mainScreen...self.navigationController.view.bounds.origin.x, self.navigationController.view.bounds.origin.y, [UIScreen mainScreen...].bounds.size.width, [UIScreen mainScreen].bounds.size.height); } }]; } 注意状态栏无法强制旋转...不可使用self.view.frame.size.width self.view.frame.size.height，这样会出现第一次旋转出现上下部分白边的Bug，需要使用 [UIScreen mainScreen...].bounds.size.width, [UIScreen mainScreen].bounds.size.height。

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iOS实现毛玻璃效果,图片模糊效果的三种方法

|| hasSaturationChange) { UIGraphicsBeginImageContextWithOptions(self.size, NO, [[UIScreen mainScreen...CGBitmapContextGetBytesPerRow(effectInContext); UIGraphicsBeginImageContextWithOptions(self.size, NO, [[UIScreen mainScreen...effectOutContext); if (hasBlur) { CGFloat inputRadius = blurRadius * [[UIScreen mainScreen...(); } // 开启上下文用于输出图像 UIGraphicsBeginImageContextWithOptions(self.size, NO, [[UIScreen mainScreen

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点击加载更多

iOS小知识汇总

苹果一倍图尺寸(iphone11pro屏幕尺寸)

iOS开发中常用的宏

UIPickerView显示和隐藏的动画

iOS 判断设备型号、屏幕尺寸、系统版本、设备朝向

玩转iOS转场动画原

对iPhone手机型号进行判断

iOS获取屏幕宽高、设备型号、系统版本信息介绍1、获取屏幕的宽高2、获取设备的型号3、获取系统版本

iOS实现点击图片放大&长按保存图片

UIScrollView 和 UIPageControl 实现启动滑动图

html图片自适应div大小_未知宽高的div元素垂直水平居中

iOS自带实现高斯模糊效果引iOS 7 UIToolbariOS 8 UIBlurEffect结

Flutter 中下载并保存图片为文件

ios textView跟随键盘的移动

controller如何拿到自定义view的点击事件？

iOS在程序中控制系统的屏幕亮度

iOS开发·适配iPhone X相关的宏和方法

【iOS开发】使用 protocol 与 extension 来限制函数作用域

UI篇－关于单个页面屏幕旋转要注意的问题

iOS实现毛玻璃效果,图片模糊效果的三种方法

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