1.任意位置拿到导航控制器
UITabBarController*tabBarVc = (UITabBarController*)[UIApplicationsharedApplication].keyWindow.rootViewController;
UINavigationController*nav = (UINavigationController*)tabBarVc.selectedViewController;
[nav pushViewController:loginController animated:YES];
2.用masonry自适应label高度和宽度
label.preferredMaxLayoutWidth = width;// 如果是多行的话给一个maxWidth
[yourLabel setContentHuggingPriority:UILayoutPriorityRequired forAxis:UILayoutConstraintAxisHorizontal];
3.copy设置导航右键
-(void)setRightBtn
{
//右导航
_shareBtn = [UIButton buttonWithType:UIButtonTypeCustom];
_shareBtn.frame = CGRectMake(ScreenWidth-50, 20, 66, 29);
[_shareBtn setTitleColor:UIColor.redColor forState:UIControlStateNormal];
[_shareBtn setTitle:@"分享" forState:0];
_shareBtn.titleLabel.font = [UIFont fontWithName:@"PingFangSC-Regular" size:15];
_shareBtn.contentHorizontalAlignment = UIControlContentHorizontalAlignmentRight;
[_shareBtn addTarget:self action:@selector(shareBtnClick) forControlEvents:UIControlEventTouchUpInside];
UIBarButtonItem *rightBtn = [[UIBarButtonItem alloc] initWithCustomView:_shareBtn];
self.navigationItem.rightBarButtonItem = rightBtn;
}
4.正确使用cocoaPods 在OC中集成Charts第三方库
https://blog.csdn.net/u010733679/article/details/80492342
http://www.hangge.com/blog/cache/detail_2122.html
https://cloud.tencent.com/developer/article/1336386
5.Runtime实用
/* 获取对象的所有属性，不包括属性值 */
- (NSArray *)getAllProperties:(id)obj
{
u_int count;
objc_property_t *properties = class_copyPropertyList([obj class], &count);
NSMutableArray *propertiesArray = [NSMutableArray arrayWithCapacity:count];
for (int i = 0; i6.设置系统uiTableViewCell的UiImageView的大小
cell.imageView.image = [UIImage imageNamed:@""];
CGSize itemSize = CGSizeMake(44, 44);
UIGraphicsBeginImageContextWithOptions(itemSize, NO, UIScreen.mainScreen.scale);
CGRect imageRect = CGRectMake(0.0, 0.0, itemSize.width, itemSize.height);
[cell.imageView.image drawInRect:imageRect];
cell.imageView.image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
7.webview清楚缓存
NSString *libraryDir = NSSearchPathForDirectoriesInDomains(NSLibraryDirectory,
NSUserDomainMask, YES)[0];
NSString *bundleId = [[[NSBundle mainBundle] infoDictionary]
objectForKey:@"CFBundleIdentifier"];
NSString *webkitFolderInLib = [NSString stringWithFormat:@"%@/WebKit",libraryDir];
NSString *webKitFolderInCaches = [NSString
stringWithFormat:@"%@/Caches/%@/WebKit",libraryDir,bundleId];
NSString *webKitFolderInCachesfs = [NSString
stringWithFormat:@"%@/Caches/%@/fsCachedData",libraryDir,bundleId];
NSError *error;
/* iOS8.0 WebView Cache的存放路径 */
[[NSFileManager defaultManager] removeItemAtPath:webKitFolderInCaches error:&error];
[[NSFileManager defaultManager] removeItemAtPath:webkitFolderInLib error:nil];
/* iOS7.0 WebView Cache的存放路径 */
[[NSFileManager defaultManager] removeItemAtPath:webKitFolderInCachesfs error:&error];
8.推出透明视图
SMSViewController *pvc = [[SMSViewController alloc]init];
pvc.view.backgroundColor = [UIColor colorWithWhite:0 alpha:0.4];
pvc.modalPresentationStyle = UIModalPresentationOverCurrentContext|UIModalPresentationFullScreen;
[self presentViewController:pvc animated:YES completion:^{
}];
9.view添加动画
[view.layer addAnimation:[self opacityForever_Animation:0.5] forKey:nil];
#pragma mark === 永久闪烁的动画 ======
-(CABasicAnimation *)opacityForever_Animation:(float)time
{
CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:@"opacity"];//必须写opacity才行。
animation.fromValue = [NSNumber numberWithFloat:1.0f];
animation.toValue = [NSNumber numberWithFloat:0.0f];//这是透明度。
animation.autoreverses = YES;
animation.duration = time;
animation.repeatCount = MAXFLOAT;
animation.removedOnCompletion = NO;
animation.fillMode = kCAFillModeForwards;
animation.timingFunction=[CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseIn];///没有的话是均匀的动画。
return animation;
}
#pragma mark =====横向、纵向移动===========
-(CABasicAnimation *)moveX:(float)time X:(NSNumber *)x
{
CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:@"transform.translation.x"];///.y的话就向下移动。
animation.toValue = x;
animation.duration = time;
animation.removedOnCompletion = NO;//yes的话，又返回原位置了。
animation.repeatCount = MAXFLOAT;
animation.fillMode = kCAFillModeForwards;
return animation;
}
#pragma mark =====缩放-=============
-(CABasicAnimation *)scale:(NSNumber *)Multiple orgin:(NSNumber *)orginMultiple durTimes:(float)time Rep:(float)repertTimes
{
CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:@"transform.scale"];
animation.fromValue = Multiple;
animation.toValue = orginMultiple;
animation.autoreverses = YES;
animation.repeatCount = repertTimes;
animation.duration = time;//不设置时候的话，有一个默认的缩放时间.
animation.removedOnCompletion = NO;
animation.fillMode = kCAFillModeForwards;
return animation;
}
#pragma mark =====组合动画-=============
-(CAAnimationGroup *)groupAnimation:(NSArray *)animationAry durTimes:(float)time Rep:(float)repeatTimes
{
CAAnimationGroup *animation = [CAAnimationGroup animation];
animation.animations = animationAry;
animation.duration = time;
animation.removedOnCompletion = NO;
animation.repeatCount = repeatTimes;
animation.fillMode = kCAFillModeForwards;
return animation;
}
#pragma mark =====路径动画-=============
-(CAKeyframeAnimation *)keyframeAnimation:(CGMutablePathRef)path durTimes:(float)time Rep:(float)repeatTimes
{
CAKeyframeAnimation *animation = [CAKeyframeAnimation animationWithKeyPath:@"position"];
animation.path = path;
animation.removedOnCompletion = NO;
animation.fillMode = kCAFillModeForwards;
animation.timingFunction = [CAMediaTimingFunction functionWithName:kCAMediaTimingFunctionEaseIn];
animation.autoreverses = NO;
animation.duration = time;
animation.repeatCount = repeatTimes;
return animation;
}
#pragma mark ====旋转动画======
-(CABasicAnimation *)rotation:(float)dur degree:(float)degree direction:(int)direction repeatCount:(int)repeatCount
{
CATransform3D rotationTransform = CATransform3DMakeRotation(degree, 0, 0, direction);
CABasicAnimation *animation = [CABasicAnimation animationWithKeyPath:@"transform"];
animation.toValue = [NSValue valueWithCATransform3D:rotationTransform];
animation.duration = dur;
animation.autoreverses = NO;
animation.cumulative = NO;
animation.fillMode = kCAFillModeForwards;
animation.repeatCount = repeatCount;
// animation.delegate = self;
return animation;
}
10.判断当前的控制器是哪个
#pragma MARK: 点击通知栏的时候 判断当前的控制器是哪个
-(UIViewController*)atPersentViewController:(UIViewController*)vc {
if (vc.presentedViewController) {
return [self atPersentViewController:vc.presentedViewController];
} else if ([vc isKindOfClass:[UISplitViewController class]]) {
UISplitViewController* svc = (UISplitViewController*) vc;
if (svc.viewControllers.count > 0)
return [self atPersentViewController:svc.viewControllers.lastObject];
else
return vc;
} else if ([vc isKindOfClass:[UINavigationController class]]) {
UINavigationController* svc = (UINavigationController*) vc;
if (svc.viewControllers.count > 0)
return [self atPersentViewController:svc.topViewController];
else
return vc;
} else if ([vc isKindOfClass:[UITabBarController class]]) {
UITabBarController* svc = (UITabBarController*) vc;
if (svc.viewControllers.count > 0)
return [self atPersentViewController:svc.selectedViewController];
else
return vc;
} else {
return vc;
}
}
-(UIViewController*) currentViewController {
UIViewController* viewController = [UIApplication sharedApplication].keyWindow.rootViewController;
return [self atPersentViewController:viewController];
}
11.生成二维码
- (CIImage *)creatQRcodeWithUrlstring:(NSString *)urlString{
// 1.实例化二维码滤镜
CIFilter *filter = [CIFilter filterWithName:@"CIQRCodeGenerator"];
// 2.恢复滤镜的默认属性 (因为滤镜有可能保存上一次的属性)
[filter setDefaults];
// 3.将字符串转换成NSdata
NSData *data = [urlString dataUsingEncoding:NSUTF8StringEncoding];
// 4.通过KVO设置滤镜, 传入data, 将来滤镜就知道要通过传入的数据生成二维码
[filter setValue:data forKey:@"inputMessage"];
//设置二维码的纠错水平，越高纠错水平越高，可以污损的范围越大
/*
* L: 7%
* M: 15%
* Q: 25%
* H: 30%
*/
[filter setValue:@"H" forKey:@"inputCorrectionLevel"];
// 5.生成二维码
CIImage *outputImage = [filter outputImage];
return outputImage;
}
- (UIImage *)createNonInterpolatedUIImageFormCIImage:(CIImage *)image withSize:(CGFloat) size
{
CGRect extent = CGRectIntegral(image.extent);
CGFloat scale = MIN(size/CGRectGetWidth(extent), size/CGRectGetHeight(extent));
// 1.创建bitmap;
size_t width = CGRectGetWidth(extent) * scale;
size_t height = CGRectGetHeight(extent) * scale;
CGColorSpaceRef cs = CGColorSpaceCreateDeviceGray();
CGContextRef bitmapRef = CGBitmapContextCreate(nil, width, height, 8, 0, cs, (CGBitmapInfo)kCGImageAlphaNone);
CIContext *context = [CIContext contextWithOptions:nil];
CGImageRef bitmapImage = [context createCGImage:image fromRect:extent];
CGContextSetInterpolationQuality(bitmapRef, kCGInterpolationNone);
CGContextScaleCTM(bitmapRef, scale, scale);
CGContextDrawImage(bitmapRef, extent, bitmapImage);
// 2.保存bitmap到图片
CGImageRef scaledImage = CGBitmapContextCreateImage(bitmapRef);
CGContextRelease(bitmapRef);
CGImageRelease(bitmapImage);
return [UIImage imageWithCGImage:scaledImage];
}