1.设置Label行间距

+ (void)setLineSpaceWithLabel:(UILabel *)label LineSpacing:(CGFloat)lineSpacing
{
    NSMutableAttributedString *attributedString =
    [[NSMutableAttributedString alloc] initWithString:label.text];
    NSMutableParagraphStyle *paragraphStyle =  [[NSMutableParagraphStyle alloc] init];
    [paragraphStyle setLineSpacing:lineSpacing];
    //调整行间距
    [attributedString addAttribute:NSParagraphStyleAttributeName
                             value:paragraphStyle
                             range:NSMakeRange(0, [label.text length])];
    label.attributedText = attributedString;
}

2.创建一张实时模糊效果 View (毛玻璃效果)

+ (UIVisualEffectView *)effectViewWithFrame:(CGRect)frame
{
    UIBlurEffect *effect = [UIBlurEffect effectWithStyle:UIBlurEffectStyleLight];
    UIVisualEffectView *effectView = [[UIVisualEffectView alloc] initWithEffect:effect];
    effectView.frame = frame;
    return effectView;
}

3.对图片进行模糊处理

// CIGaussianBlur ---> 高斯模糊
// CIBoxBlur      ---> 均值模糊
// CIDiscBlur    --->  环形卷积模糊
// CIMedianFilter ---> 中值模糊, 用于消除图像噪点, 无需设置
// CIMotionBlur  --->  运动模糊, 用于模拟相机移动拍摄时的扫尾效果
+ (UIImage *)blurWithOriginalImage:(UIImage *)image
                          blurName:(NSString *)name
                            radius:(NSInteger)radius
{
    CIContext *context = [CIContext contextWithOptions:nil];
    CIImage *inputImage = [[CIImage alloc] initWithImage:image];
    CIFilter *filter;
    if (name.length != 0) {
        filter = [CIFilter filterWithName:name];
        [filter setValue:inputImage forKey:kCIInputImageKey];
        if (![name isEqualToString:@"CIMedianFilter"]) {
            [filter setValue:@(radius) forKey:@"inputRadius"];
        }
        CIImage *result = [filter valueForKey:kCIOutputImageKey];
        CGImageRef cgImage = [context createCGImage:result fromRect:[result extent]];
        UIImage *resultImage = [UIImage imageWithCGImage:cgImage];
        CGImageRelease(cgImage);
        return resultImage;
    }else{
        return nil;
    }
}

4.对图片进行滤镜处理

// 怀旧 --> CIPhotoEffectInstant      单色 --> CIPhotoEffectMono
// 黑白 --> CIPhotoEffectNoir         褪色 --> CIPhotoEffectFade
// 色调 --> CIPhotoEffectTonal        冲印 --> CIPhotoEffectProcess
// 岁月 --> CIPhotoEffectTransfer     铬黄 --> CIPhotoEffectChrome
// CILinearToSRGBToneCurve, CISRGBToneCurveToLinear, CIGaussianBlur, CIBoxBlur, CIDiscBlur, CISepiaTone, CIDepthOfField
+ (UIImage *)filterWithOriginalImage:(UIImage *)image filterName:(NSString *)name
{
    CIContext *context = [CIContext contextWithOptions:nil];
    CIImage *inputImage = [[CIImage alloc] initWithImage:image];
    CIFilter *filter = [CIFilter filterWithName:name];
    [filter setValue:inputImage forKey:kCIInputImageKey];
    CIImage *result = [filter valueForKey:kCIOutputImageKey];
    CGImageRef cgImage = [context createCGImage:result fromRect:[result extent]];
    UIImage *resultImage = [UIImage imageWithCGImage:cgImage];
    CGImageRelease(cgImage);
    return resultImage;
}

5.磁盘可用空间大小

+ (CGFloat)diskOfFreeSizeMBytes
{
    CGFloat size = 0.0;
    NSError *error;
    NSDictionary *dic = [[NSFileManager defaultManager] attributesOfFileSystemForPath:NSHomeDirectory() error:&error];
    if (error) {
        NSLog(@"error: %@", error.localizedDescription);
    }else{
        NSNumber *number = [dic objectForKey:NSFileSystemFreeSize];
        size = [number floatValue]/1024/1024;
    }
    return size;
}

6.磁盘总空间大小

+ (CGFloat)diskOfAllSizeMBytes
{
    CGFloat size = 0.0;
    NSError *error;
    NSDictionary *dic = [[NSFileManager defaultManager] attributesOfFileSystemForPath:NSHomeDirectory() error:&error];
    if (error) {
        NSLog(@"error: %@", error.localizedDescription);
    }else{
        NSNumber *number = [dic objectForKey:NSFileSystemSize];
        size = [number floatValue]/1024/1024;
    }
    return size;
}

7.是否有中文

+ (BOOL)isHaveChineseInString:(NSString *)string
{
    for(NSInteger i = 0; i < [string length]; i++){
        int a = [string characterAtIndex:i];
        if (a > 0x4e00 && a < 0x9fff) {
            return YES;
        }
    }
    return NO;
}

8.是否有空格

+ (BOOL)isHaveSpaceInString:(NSString *)string{
    NSRange _range = [string rangeOfString:@" "];
    if (_range.location != NSNotFound) {
        return YES;
    }else {
        return NO;
    }
}

小弟刚加入简书的第一篇文章，有不足的地方，欢迎各位大神补充、指教！