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1.iOS - 推送 openssl 合并//1.1 生成 opensslkey openssl pkcs12 -nocerts -out PushKey.pem -in apns-dev-cert.p12 //1.2 输入以上成功之后会出现以下这段： Enter PEM pass phrase：输入密码 //2.导出 pem openssl pkcs12 -clcerts -nokeys -out apns-dev-cert.pem -in apns-dev-cert.p12 //3.将 key 和 pem 合并 cat PushKey.pem apns-dev-cert.pem > apns-Dev.pem===========================================================================================================
2.Cookie(小甜饼 )
//cookie 介绍
Cookie 由服务器端生成，发送给客户端
客户端将 Cookie 的 key/value 保存到某个目录下的文本文件内
如果客户端支持 Cookie ，下次请求同一网站时就可以 Cookie 直接发送给服务器
Cookie 名称和值由服务器端开发自己定义
Cookies 最典型的应用是判定注册用户是否已经登录，记录用户登录信息，简化下次登录的过程
另一个重要应用场合是 “ 购物车 ”
在 iOS 程序中，默认就支持 Cookie ，程序员无需做任何处理
如果服务器返回 Cookie ，会自动保存在沙盒的 Library/Cookies 目录中
/* Cookie的存储策略 */
/* Cookie 的保存 */
保存在 沙盒 /Library/Cookies 目录下，以二进制的形式保存
但是仍然能够看到密码的明文，说明不安全！
/* 获取 cookie 的方法 */
/* Cookie的缺陷 */
Cookie会被附加在每个HTTP请求中，会增加额外的流量
在HTTP请求中的Cookie是明文传递的，因此会有安全隐患，除非使用HTTPS
@property NSHTTPCookieAcceptPolicy cookieAcceptPolicy; NSHTTPCookieAcceptPolicyAlways, 永远 NSHTTPCookieAcceptPolicyNever, 永不 NSHTTPCookieAcceptPolicyOnlyFromMainDocumentDomain 只记录主域名的Cookie //提示：如果禁用Cookie有些网络访问会不正常！ //这个选项只要知道即可，不建议修改！
/* Cookie 的保存 */
保存在 沙盒 /Library/Cookies 目录下，以二进制的形式保存
但是仍然能够看到密码的明文，说明不安全！
/* 获取 cookie 的方法 */
// 检查Cookie中是否保存了用户的信息
// 1. 拿出所有的cookie
NSArray *cookies = [[NSHTTPCookieStorage sharedHTTPCookieStorage] cookies];
// 2. 遍历cookies检查是否有用户名和密码
for (NSHTTPCookie *cookie in cookies) {
/**
NSHTTPCookie中存储的内容
name: 变量名->变量名&值是从服务器返回的
value: 变量值
*/
NSLog(@"%@", cookie);
if ([cookie.name isEqualToString:@"userName"]) { // 用户名
self.nameText.text = cookie.value;
} else if ([cookie.name isEqualToString:@"userPassword"]) { // 密码
self.pwdText.text = cookie.value;
}
}
// 3. 删除Cookie
// 读取所有cookie
NSArray *cookies = [[NSHTTPCookieStorage sharedHTTPCookieStorage] cookies];
// 删除cookie
for (NSHTTPCookie *cookie in cookies) {
[[NSHTTPCookieStorage sharedHTTPCookieStorage] deleteCookie:cookie];
}
/* Cookie的缺陷 */
Cookie会被附加在每个HTTP请求中，会增加额外的流量
在HTTP请求中的Cookie是明文传递的，因此会有安全隐患，除非使用HTTPS
Cookie的大小限制在4KB左右，不适合存储复杂的数据信息
===========================================================================================================
3.截图使用场景: iOS 7中的代码代段
// 使用上下文截图,并使用指定的区域裁剪,模板代码
- (void)screenShot
{
// 将要被截图的view,即窗口的根控制器的view(必须不含状态栏,默认ios7中控制器是包含了状态栏的)
BeyondViewController *beyondVC = self.view.window.rootViewController;
// 背景图片 总的大小
CGSize size = beyondVC.view.frame.size;
// 开启上下文,使用参数之后,截出来的是原图（YES 0.0 质量高）
UIGraphicsBeginImageContextWithOptions(size, YES, 0.0);
// 裁剪的关键代码,要裁剪的矩形范围
CGRect rect = CGRectMake(0, -20, size.width, size.height + 20 );
//注：iOS7以后renderInContext：由drawViewHierarchyInRect：afterScreenUpdates：替代
[beyondVC.view drawViewHierarchyInRect:rect afterScreenUpdates:NO];
// 从上下文中,取出UIImage
UIImage *snapshot = UIGraphicsGetImageFromCurrentImageContext();
// 添加截取好的图片到图片数组
[_cutImages addObject:snapshot];
// 千万记得,结束上下文(移除栈顶上下文)
UIGraphicsEndImageContext();
}
===========================================================================================================
4.解决UIButton 按钮重复点击
配合Github上我写的扩展使用，简单实用：
https://github.com/XiaoHanGe/JQButtonRepeatClick
配合Github上我写的扩展使用，简单实用：
https://github.com/XiaoHanGe/JQButtonRepeatClick
// test
UIButton *testBtn = [UIButton buttonWithType:UIButtonTypeCustom];
testBtn.frame = CGRectMake(100, 100, [UIScreen mainScreen].bounds.size.width-200, [UIScreen mainScreen].bounds.size.height/3);
testBtn.backgroundColor = [UIColor greenColor];
[testBtn setTitleColor:[UIColor redColor] forState:(UIControlStateNormal)];
[testBtn setTitle:@"测试" forState:UIControlStateNormal];
[testBtn addTarget:self action:@selector(goToTestAction:) forControlEvents:UIControlEventTouchUpInside];
// 设置几秒内忽略重复点击
testBtn.JQ_acceptEventInterval = 1;
[self.view addSubview:testBtn];
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===========================================================================================================
5.#pragma mark -- 设置在一个文本中所有特殊字符的特殊颜色
===========================================================================================================
6. 放大缩小
===========================================================================================================
===========================================================================================================
10.优化建议
===========================================================================================================
===========================================================================================================
12.tab Bar的隐藏与消失
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+ (NSMutableAttributedString *)setAllText:(NSString *)allStr andSpcifiStr:(NSString *)specifiStr withColor:(UIColor *)color specifiStrFont:(UIFont *)font {
NSMutableAttributedString *mutableAttributedStr = [[NSMutableAttributedString alloc] initWithString:allStr];
if (color == nil) {
color = [UIColor redColor];
}
if (font == nil) {
font = [UIFont systemFontOfSize:17.];
}
// NSArray *array = [allStr componentsSeparatedByString:specifiStr];//array.cout-1是所有字符特殊字符出现的次数
NSRange searchRange = NSMakeRange(0, [allStr length]);
NSRange range;
//拿到所有的相同字符的range
while
((range = [allStr rangeOfString:specifiStr options:0 range:searchRange]).location != NSNotFound) {
//改变多次搜索时searchRange的位置
searchRange = NSMakeRange(NSMaxRange(range), [allStr length] - NSMaxRange(range));
//设置富文本
[mutableAttributedStr addAttribute:NSForegroundColorAttributeName value:color range:range];
[mutableAttributedStr addAttribute:NSFontAttributeName value:font range:range];
}
return mutableAttributedStr;
}
===========================================================================================================
6. 放大缩小
// 放大
- (void)shakeToShow:(UIButton*)aView{
CAKeyframeAnimation* animation = [CAKeyframeAnimation animationWithKeyPath:@"transform"];
animation.duration = 0.5;
NSMutableArray *values = [NSMutableArray array];
[values addObject:[NSValue valueWithCATransform3D:CATransform3DMakeScale(0.1, 0.1, 1.0)]];
[values addObject:[NSValue valueWithCATransform3D:CATransform3DMakeScale(1.2, 1.2, 1.0)]];
[values addObject:[NSValue valueWithCATransform3D:CATransform3DMakeScale(0.9, 0.9, 1.0)]];
[values addObject:[NSValue valueWithCATransform3D:CATransform3DMakeScale(1.0, 1.0, 1.0)]];
animation.values = values;
[aView.layer addAnimation:animation forKey:nil];
}
// 缩小
- (void)shakeToHidden:(UIButton*)aView{
CAKeyframeAnimation* animation = [CAKeyframeAnimation animationWithKeyPath:@"transform"];
animation.duration = 0.5;
NSMutableArray *values = [NSMutableArray array];
[values addObject:[NSValue valueWithCATransform3D:CATransform3DMakeScale(1.0, 1.0, 1.0)]];
[values addObject:[NSValue valueWithCATransform3D:CATransform3DMakeScale(0.9, 0.9, 1.0)]];
[values addObject:[NSValue valueWithCATransform3D:CATransform3DMakeScale(1.2, 1.2, 1.0)]];
[values addObject:[NSValue valueWithCATransform3D:CATransform3DMakeScale(0.1, 0.1, 1.0)]];
animation.values = values;
[aView.layer addAnimation:animation forKey:nil];
}
- (void)showWithAView:(UIButton*)aView
{
[CATransaction begin]; {
// start the transform animation from its current value if it's already running
NSValue *fromValue = [aView.layer animationForKey:@"transform"] ? [aView.layer.presentationLayer valueForKey:@"transform"] : [NSValue valueWithCATransform3D:CATransform3DMakeScale(0.5, 0.5, 1)];
CABasicAnimation *scaleAnim = [CABasicAnimation animationWithKeyPath:@"transform"];
scaleAnim.fromValue = fromValue;
scaleAnim.toValue = [NSValue valueWithCATransform3D:CATransform3DIdentity];
[scaleAnim setTimingFunction:[CAMediaTimingFunction functionWithControlPoints:0.8 :2.5 :0.35 :0.5]];
scaleAnim.removedOnCompletion = NO;
scaleAnim.fillMode = kCAFillModeForwards;
scaleAnim.duration = 0.4;
[aView.layer addAnimation:scaleAnim forKey:@"transform"];
CABasicAnimation* fadeInAnim = [CABasicAnimation animationWithKeyPath:@"opacity"];
fadeInAnim.fromValue = [aView.layer.presentationLayer valueForKey:@"opacity"];
fadeInAnim.duration = 0.1;
fadeInAnim.toValue = @1.0;
[aView.layer addAnimation:fadeInAnim forKey:@"opacity"];
aView.layer.opacity = 1.0;
} [CATransaction commit];
}
- (void)hideWithAView:(UIButton*)aView
{
[CATransaction begin]; {
[CATransaction setCompletionBlock:^{
// remove the transform animation if the animation finished and wasn't interrupted
if (aView.layer.opacity == 0.0) [aView.layer removeAnimationForKey:@"transform"];
}];
CABasicAnimation *scaleAnim = [CABasicAnimation animationWithKeyPath:@"transform"];
scaleAnim.fromValue = [aView.layer.presentationLayer valueForKey:@"transform"];
scaleAnim.toValue = [NSValue valueWithCATransform3D:CATransform3DMakeScale(0.5, 0.5, 1)];
scaleAnim.duration = 0.6;
scaleAnim.removedOnCompletion = NO;
scaleAnim.fillMode = kCAFillModeForwards;
[scaleAnim setTimingFunction:[CAMediaTimingFunction functionWithControlPoints:0.1 :-2 :0.3 :3]];
[aView.layer addAnimation:scaleAnim forKey:@"transform"];
CABasicAnimation* fadeOutAnim = [CABasicAnimation animationWithKeyPath:@"opacity"];
fadeOutAnim.fromValue = [aView.layer.presentationLayer valueForKey:@"opacity"];
fadeOutAnim.toValue = @0.0;
fadeOutAnim.duration = 0.8;
[aView.layer addAnimation:fadeOutAnim forKey:@"opacity"];
aView.layer.opacity = 0.0;
} [CATransaction commit];
}
===========================================================================================================
7.#pragma mark - 抖动动画
===========================================================================================================
- (void)shakeAnimation
{
CAKeyframeAnimation *animation = [CAKeyframeAnimation animationWithKeyPath:@"position.x"];
//获取当前View的position坐标
CGFloat positionX = self.layer.position.x;
//设置抖动的范围
animation.values = @[@(positionX-10),@(positionX),@(positionX+10)];
//动画重复的次数
animation.repeatCount = 3;
//动画时间
animation.duration = 0.07;
//设置自动反转
animation.autoreverses = YES;
[self.layer addAnimation:animation forKey:nil];
}
===========================================================================================================
8.iOS - 直接退出应用
===========================================================================================================
//使用
-(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{
[self exitApplication];
}
//退出方法
- (void)exitApp {
[UIView beginAnimations:@"exitApplication" context:nil];
[UIView setAnimationDuration:0.5];
[UIView setAnimationDelegate:self];
[UIView setAnimationTransition:UIViewAnimationTransitionCurlUp forView:self.view.window cache:NO];
[UIView setAnimationDidStopSelector:@selector(animationFinished:finished:context:)];
self.view.window.bounds = CGRectMake(0, 0, 0, 0);
[UIView commitAnimations];
}
- (void)animationFinished:(NSString *)animationID finished:(NSNumber *)finished context:(void *)context {
if ([animationID compare:@"exitApplication"] == 0)
{
//退出
exit(0);
}
}
===========================================================================================================
9.iOS - 图片模糊效果
vImage 方式添加通用模糊效果
#import <Accelerate/Accelerate.h>
//加模糊效果，image是图片，blur是模糊度
- (UIImage *)blurryImage:(UIImage *)image withBlurLevel:(CGFloat)blur
{
if (image==nil)
{
NSLog(@"error:为图片添加模糊效果时，未能获取原始图片");
return nil;
}
//模糊度,
if ((blur < 0.1f) || (blur > 2.0f)) {
blur = 0.5f;
}
//boxSize必须大于0
int boxSize = (int)(blur * 100);
boxSize -= (boxSize % 2) + 1;
NSLog(@"boxSize:%i",boxSize);
//图像处理
CGImageRef img = image.CGImage;
//需要引入#import <Accelerate/Accelerate.h>
/*
This document describes the Accelerate Framework, which contains C APIs for vector and matrix math, digital signal processing, large number handling, and image processing.
本文档介绍了Accelerate Framework，其中包含C语言应用程序接口（API）的向量和矩阵数学，数字信号处理，大量处理和图像处理。
*/
//图像缓存,输入缓存，输出缓存
vImage_Buffer inBuffer, outBuffer;
vImage_Error error;
//像素缓存
void *pixelBuffer;
//数据源提供者，Defines an opaque type that supplies Quartz with data.
CGDataProviderRef inProvider = CGImageGetDataProvider(img);
// provider’s data.
CFDataRef inBitmapData = CGDataProviderCopyData(inProvider);
//宽，高，字节/行，data
inBuffer.width = CGImageGetWidth(img);
inBuffer.height = CGImageGetHeight(img);
inBuffer.rowBytes = CGImageGetBytesPerRow(img);
inBuffer.data = (void*)CFDataGetBytePtr(inBitmapData);
//像数缓存，字节行*图片高
pixelBuffer = malloc(CGImageGetBytesPerRow(img) * CGImageGetHeight(img));
outBuffer.data = pixelBuffer;
outBuffer.width = CGImageGetWidth(img);
outBuffer.height = CGImageGetHeight(img);
outBuffer.rowBytes = CGImageGetBytesPerRow(img);
// 第三个中间的缓存区,抗锯齿的效果
void *pixelBuffer2 = malloc(CGImageGetBytesPerRow(img) * CGImageGetHeight(img));
vImage_Buffer outBuffer2;
outBuffer2.data = pixelBuffer2;
outBuffer2.width = CGImageGetWidth(img);
outBuffer2.height = CGImageGetHeight(img);
outBuffer2.rowBytes = CGImageGetBytesPerRow(img);
//Convolves a region of interest within an ARGB8888 source image by an implicit M x N kernel that has the effect of a box filter.
error = vImageBoxConvolve_ARGB8888(&inBuffer, &outBuffer2, NULL, 0, 0, boxSize, boxSize, NULL, kvImageEdgeExtend);
error = vImageBoxConvolve_ARGB8888(&outBuffer2, &inBuffer, NULL, 0, 0, boxSize, boxSize, NULL, kvImageEdgeExtend);
error = vImageBoxConvolve_ARGB8888(&inBuffer, &outBuffer, NULL, 0, 0, boxSize, boxSize, NULL, kvImageEdgeExtend);
if (error) {
NSLog(@"error from convolution %ld", error);
}
// NSLog(@"字节组成部分：%zu",CGImageGetBitsPerComponent(img));
//颜色空间DeviceRGB
CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB();
//用图片创建上下文,CGImageGetBitsPerComponent(img),7,8
CGContextRef ctx = CGBitmapContextCreate(
outBuffer.data,
outBuffer.width,
outBuffer.height,
8,
outBuffer.rowBytes,
colorSpace,
CGImageGetBitmapInfo(image.CGImage));
//根据上下文，处理过的图片，重新组件
CGImageRef imageRef = CGBitmapContextCreateImage (ctx);
UIImage *returnImage = [UIImage imageWithCGImage:imageRef];
//clean up
CGContextRelease(ctx);
CGColorSpaceRelease(colorSpace);
free(pixelBuffer);
free(pixelBuffer2);
CFRelease(inBitmapData);
//CGColorSpaceRelease(colorSpace); //多余的释放
CGImageRelease(imageRef);
return returnImage;
}
===========================================================================================================
10.优化建议
优化建议：
避免图层混合
· 确保控件的opaque属性设置为true，确保backgroundColor和父视图颜色一致且不透明
· 如无特殊需要，不要设置低于1的alpha值
· 确保UIImage没有alpha通道
避免临时转换
· 确保图片大小和frame一致，不要在滑动时缩放图片
· 确保图片颜色格式被GPU支持，避免劳烦CPU转换
慎用离屏渲染
· 绝大多数时候离屏渲染会影响性能
· 重写drawRect方法，设置圆角、阴影、模糊效果，光栅化都会导致离屏渲染
· 设置阴影效果是加上阴影路径
· 确保控件的opaque属性设置为true，确保backgroundColor和父视图颜色一致且不透明
· 如无特殊需要，不要设置低于1的alpha值
· 确保UIImage没有alpha通道
避免临时转换
· 确保图片大小和frame一致，不要在滑动时缩放图片
· 确保图片颜色格式被GPU支持，避免劳烦CPU转换
慎用离屏渲染
· 绝大多数时候离屏渲染会影响性能
· 重写drawRect方法，设置圆角、阴影、模糊效果，光栅化都会导致离屏渲染
· 设置阴影效果是加上阴影路径
· 滑动时若需要圆角效果，开启光栅化
===========================================================================================================
11.iOS - 收起键盘
对应控件 resignFirstResponder
touchesBegin 中 [self.view endEditing:YES]; [[UIApplication sharedApplication]sendAction:@selector(resignFirstResponder) to:nil from:nil forEvent:nil]; [[[UIApplication sharedApplication]keyWindow]endEditing:YES];
===========================================================================================================
12.tab Bar的隐藏与消失
// tabBar的隐藏与消失
- (void)hidesTabBar:(BOOL)hidden{
[UIView beginAnimations:nil context:NULL];
[UIView setAnimationDuration:0];
for (UIView *view in self.tabBarController.view.subviews){
if ([view isKindOfClass:[UITabBar class]]) {
if (hidden) {
[view setFrame:CGRectMake(view.frame.origin.x, [UIScreen mainScreen].bounds.size.height, view.frame.size.width , view.frame.size.height)];
}else{
[view setFrame:CGRectMake(view.frame.origin.x, [UIScreen mainScreen].bounds.size.height - 49, view.frame.size.width, view.frame.size.height)];
}
}else{
if([view isKindOfClass:NSClassFromString(@"UITransitionView")]){
if (hidden){
[view setFrame:CGRectMake(view.frame.origin.x, view.frame.origin.y, view.frame.size.width, [UIScreen mainScreen].bounds.size.height)];
}else{
[view setFrame:CGRectMake(view.frame.origin.x, view.frame.origin.y, view.frame.size.width, [UIScreen mainScreen].bounds.size.height - 49 )];
}
}
}
}
[UIView commitAnimations];
}
===========================================================================================================
13.判断页面消失或出现时是push还是pop操作：
- (void)viewWillDisappear:(BOOL)animated {
NSArray *viewControllers = self.navigationController.viewControllers;//获取当前的视图控制其
if (viewControllers.count > 1 && [viewControllers objectAtIndex:viewControllers.count-2] == self) {
//当前视图控制器在栈中，故为push操作
NSLog(@"push");
} else if ([viewControllers indexOfObject:self] == NSNotFound) {
//当前视图控制器不在栈中，故为pop操作
NSLog(@"pop");
}
}
