#pragma mark - 图片截取- (UIImage*)clipImage:(UIImage*)image inRect:(CGRect)rect
{//返回image中rect范围内的图片CGImageRef imageRef = CGImageCreateWithImageInRect(image.CGImage, rect);UIImage*subImage = [UIImageimageWithCGImage:imageRef];returnsubImage;
}#pragma mark - 计算字符串尺寸// 计算一个字符串完整展示所需要的size// 第一个参数是最大不能超过的size// 第二个参数固定写法// 第三个参数是计算size时字符串的属性CGSizesize = [str boundingRectWithSize:CGSizeMake(width -5, MAXFLOAT) options:NSStringDrawingUsesLineFragmentOrigin attributes:[NSDictionarydictionaryWithObjectsAndKeys:self.label.font, NSFontAttributeName,nil] context:nil].size;// 根据计算的结果修改label的frameCGRectframe =self.label.frame;
frame.size.width= size.width+5;
frame.size.height= size.height+5;self.label.frame= frame;
#pragma mark - 动画#pragma mark -简单动画/** 动画1 **/// 简单动画，可以修改frame，alpha（透明度1.0），背景色// 完成frame修改的动作需要两秒，但是代码不会卡住，代码会继续运行[UIViewanimateWithDuration:2animations:^{
bigView.frame= frame;
}];/** 动画2 **/[UIViewanimateWithDuration:2animations:^{
bigView.frame= frame;
} completion:^(BOOLfinished) {NSLog(@"动画完成以后的回调=%d",finished);
}];/** 动画3 **/// 开始简单动画[UIViewbeginAnimations:nilcontext:NULL];// 设置动画时间[UIViewsetAnimationDuration:2];//... 添加代码，属于要展示动画的区域// 提交动画[UIViewcommitAnimations];/** 跟随模式 **//*
UIViewAutoresizingNone = 0,
UIViewAutoresizingFlexibleLeftMargin = 1 << 0,
UIViewAutoresizingFlexibleWidth = 1 << 1,
UIViewAutoresizingFlexibleRightMargin = 1 << 2,
UIViewAutoresizingFlexibleTopMargin = 1 << 3,
UIViewAutoresizingFlexibleHeight = 1 << 4,
UIViewAutoresizingFlexibleBottomMargin = 1 << 5
*/// 允许子视图跟随bigView.autoresizesSubviews=YES;// 子视图跟随的模式smallView.autoresizingMask= UIViewAutoresizingFlexibleTopMargin | UIViewAutoresizingFlexibleBottomMargin | UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleRightMargin | UIViewAutoresizingFlexibleWidth | UIViewAutoresizingFlexibleHeight;#pragma mark -基础动画/***************CABasicAnimation************/// 创建核心动画// 缩放比例用transform.scale//transform.scale代表缩放（倍数）//transform.rotation.x transform.rotation.y transform.rotation.z 代表旋转（角度）CABasicAnimation *ani = [CABasicAnimation animationWithKeyPath:@"transform.rotation.y"];// 动画的始末值// @0.5 相当于 [NSNumber numberWithFloat:0.5]ani.fromValue= @0;
ani.toValue= @M_PI;// 单次动画时间ani.duration=2;// 重复次数ani.repeatCount=10;// 动画返回形式ani.autoreverses=YES;// 添加动画[view.layeraddAnimation:ani forKey:@"aaa"];// 移除动画[longPressGR.view.layerremoveAnimationForKey:@"aaa"];#pragma mark -转场动画// 创建转场动画CATransition *tt = [CATransition animation];// 动画时间tt.duration=2;// 方向tt.subtype= kCATransitionFromBottom;//四种预设，某些类型中此设置无效kCATransitionFromRight
kCATransitionFromLeft
kCATransitionFromTop
kCATransitionFromBottom// 类型（系统自带的有4个）tt.type= kCATransitionMoveIn;
tt.type= @"rotate";/*
1---->
#define定义的常量（基本型）
kCATransitionFade 交叉淡化过渡
kCATransitionMoveIn 新视图移到旧视图上面
kCATransitionPush 新视图把旧视图推出去
kCATransitionReveal 将旧视图移开,显示下面的新视图
2--->
苹果官方自定义类型:
fade moveIn push reveal 和上面的四种一样
pageCurl pageUnCurl 翻页
rippleEffect 滴水效果
suckEffect 收缩效果，如一块布被抽走
cube alignedCube 立方体效果
flip alignedFlip oglFlip 翻转效果
rotate 旋转
cameraIris cameraIrisHollowOpen cameraIrisHollowClose 相机
*/[self.navigationController.view.layeraddAnimation:tt forKey:nil];
[self.navigationControllerpushViewController:dvc animated:NO];#pragma mark - UIApplicationopenURL:
●UIApplication有个功能⼗十分强⼤大的openURL:⽅方法 - (BOOL)openURL:(NSURL*)url;
● openURL:⽅方法的部分功能有
➢ 打电话UIApplication*app = [UIApplicationsharedApplication]; [app openURL:[NSURLURLWithString:@"tel://10086"]];
➢ 发短信
[app openURL:[NSURLURLWithString:@"sms://10086"]];
➢ 发邮件
[app openURL:[NSURLURLWithString:@"mailto://12345@qq.com"]];
➢ 打开⼀一个⺴⽹网⻚页资源
[app openURL:[NSURLURLWithString:@"http://ios.itcast.cn"]];
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