OC: UIImage+MaxMethod

因为涉及到图片, 运用到了主流的三方库SDWebImage
.h文件

#import <UIKit/UIKit.h>

@interface UIImage (MaxMethod)
// 压缩图片尺寸
- (UIImage *)setImagesSize:(CGSize)size;
- (UIImage *) clipImageWithMaxBorder:(CGFloat)max;
/**
 *  添加水印，分宽高两种
 *
 *  @param logo  要添加的LOGO图案
 *  @param scale LOG图案沾总图的宽或者高的比例0.0~1.0
 *
 *  @return 新生成的图片
 */
- (UIImage *)addImageLogo:(UIImage *)logo withScale:(CGFloat)scale;
/**
 *  添加水印，按宽的比例
 *
 *  @param logo  要添加的LOGO图案
 *  @param scale LOG图案沾总图的宽的比例0.0~1.0
 *
 *  @return 新生成的图片
 */
- (UIImage *)addImageLogo:(UIImage *)logo withWidthScale:(CGFloat)scale;
// 生成一个渐变图片
+ (UIImage *)createImage:(NSArray *)colors locations:(NSArray *)locations from:(CGPoint)from to:(CGPoint)to;
// 加载Gif图
+ (UIImage *)animationWithGifData:(NSData *)data;

/**
 创建1*1大小的纯色图片
 @param color 图片
 颜色
 @return 创建的图片
 */
+ (UIImage *)imageWithColor:(UIColor *)color;


/**
 创建指定大小、颜色的图片
 @param color 图片颜色
 @param size 图片大小
 @return 创建的图片
 */
+ (UIImage *)imageWithColor:(UIColor *)color size:(CGSize)size;


/**
 创建纯色背景、文字居中的图片
 @param color 图片背景色
 @param size 图片大小
 @param attributeString 居中文字
 @return 创建的图片
 */
+ (UIImage *)imageWithColor:(UIColor *)color size:(CGSize)size text:(NSAttributedString *)attributeString;


/**
 裁剪圆形图片
 @param image 需要裁剪的图片
 @param inset 裁剪inset
 @return 裁剪后的图片
 */
+ (UIImage *)ellipseImage:(UIImage *)image withInset:(CGFloat)inset;


/**
 裁剪带边框的圆形图片
 @param image 需要裁剪的图片
 @param inset 裁剪inset
 @param width 边框宽度
 @param color 边框颜色
 @return 裁剪后的图片
 */
+ (UIImage *)ellipseImage: (UIImage *) image withInset:(CGFloat)inset withBorderWidth:(CGFloat)width withBorderColor:(UIColor*)color;

@end

.m文件

#import "UIImage+MaxMethod.h"
#import <SDWebImage/UIImage+GIF.h>

@implementation UIImage (MaxMethod)
- (UIImage *)setImagesSize:(CGSize)size
{
    UIImage *image = nil;
    UIGraphicsBeginImageContextWithOptions(size, YES, 0.0);
    [self drawInRect:CGRectMake(0, 0, size.width, size.height)];
    image = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    return image;
}

- (UIImage *)clipImageWithMaxBorder:(CGFloat)max {
    UIImage *image = nil;
    CGFloat width = 0.0;
    CGFloat height = 0.0;
    if (self.size.width > self.size.height) {
        width = max;
        height = self.size.height * (max / self.size.width);
    } else {
        height = max;
        width = self.size.width * (max / self.size.height);
    }
    UIGraphicsBeginImageContextWithOptions(CGSizeMake(width, height), YES, 1.0);
    [self drawInRect:CGRectMake(0, 0, width, height)];
    image = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    return image;
}

- (UIImage *)addImageLogo:(UIImage *)logo withScale:(CGFloat)scale
{
    UIImage *image = nil;
//    NSLogSize(self.size);
    UIGraphicsBeginImageContextWithOptions(self.size, YES, 0.0);
    [self drawInRect:CGRectMake(0, 0, self.size.width, self.size.height)];
    CGFloat logoW,logoH;
    
    if (0 != scale) {
        CGFloat proportion = logo.size.height / logo.size.width;
        if (self.size.width > self.size.height) {
            logoW = self.size.width * scale;
            logoH = logoW * proportion;
        } else {
            logoH = self.size.height * scale;
            logoW = logoH / proportion;
        }
    } else {
        logoW = logo.size.width;
        logoH = logo.size.height;
    }
    
    CGFloat logoX = self.size.width - logoW;
    CGFloat logoY = self.size.height - logoH;
    [logo drawInRect:CGRectMake(logoX, logoY, logoW, logoH)];
    image = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    return image;
}

- (UIImage *)addImageLogo:(UIImage *)logo withWidthScale:(CGFloat)scale
{
    UIImage *image = nil;
//    NSLogSize(self.size);
    UIGraphicsBeginImageContextWithOptions(self.size, YES, 0.0);
    [self drawInRect:CGRectMake(0, 0, self.size.width, self.size.height)];
    CGFloat logoW,logoH;
    CGFloat proportion = logo.size.height / logo.size.width;
    logoW = self.size.width * scale;
    logoH = logoW * proportion;
    
    CGFloat logoX = self.size.width - logoW;
    CGFloat logoY = self.size.height - logoH;
    [logo drawInRect:CGRectMake(logoX, logoY, logoW, logoH)];
    image = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    return image;
}
+ (UIImage *)createImage:(NSArray *)colors locations:(NSArray *)locations from:(CGPoint)from to:(CGPoint)to {
    CGSize size = CGSizeMake(colors.count, colors.count);
    CAGradientLayer *layer = [CAGradientLayer layer];
    layer.frame = CGRectMake(0, 0, size.width, size.height);
    layer.colors = colors;
    layer.locations = locations;
    layer.startPoint = from;
    layer.endPoint = to;
    UIGraphicsBeginImageContext(size);
    [layer renderInContext:UIGraphicsGetCurrentContext()];
    UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    return image;
}
+ (UIImage *)createShadowImage {
    UIGraphicsBeginImageContext(CGSizeMake(1, 1));
    UIBezierPath *path = [UIBezierPath bezierPathWithRect:CGRectMake(0, 0, 1, 1)];
    [[UIColor clearColor] set];
    [path fill];
    UIImage *shadowImage = UIGraphicsGetImageFromCurrentImageContext();
    return shadowImage;
}

+ (UIImage *)animationWithGifData:(NSData *)data {
    if (!data) {
        return nil;
    }
    
    CGImageSourceRef source = CGImageSourceCreateWithData((__bridge CFDataRef)data, NULL);
    
    size_t count = CGImageSourceGetCount(source);
    
    UIImage *animatedImage;
    
    if (count <= 1) {
        animatedImage = [[UIImage alloc] initWithData:data];
    } else {
        CGFloat scale = 1;
        scale = [UIScreen mainScreen].scale;
        NSMutableArray *images = [NSMutableArray array];
        for (int i = 0; i < count; i++) {
            CGImageRef CGImage = CGImageSourceCreateImageAtIndex(source, i, NULL);
            UIImage *frameImage = [UIImage imageWithCGImage:CGImage scale:scale orientation:UIImageOrientationUp];
            [images addObject:frameImage];
            CGImageRelease(CGImage);
        }
        animatedImage = [UIImage animatedImageWithImages:images duration:images.count * 0.1];
    }
    CFRelease(source);
    
    return animatedImage;
}

+ (UIImage *)imageWithColor:(UIColor *)color {
    
    return [UIImage imageWithColor:color size:CGSizeMake(1.f, 1.f)];
}

+ (UIImage *)imageWithColor:(UIColor *)color size:(CGSize)size {
    CGRect rect = CGRectMake(0.0f, 0.0f, size.width, size.height);
    UIGraphicsBeginImageContext(rect.size);
    CGContextRef context = UIGraphicsGetCurrentContext();
    CGContextSetFillColorWithColor(context, [color CGColor]);
    CGContextFillRect(context, rect);
    UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    return image;
}

+ (UIImage *)imageWithColor:(UIColor *)color size:(CGSize)size text:(NSAttributedString *)attributeString {
    UIImage *image = [UIImage imageWithColor:color size:size];
    
    CGRect rect = CGRectMake(0.0f, 0.0f, size.width, size.height);
    CGSize textSize = [attributeString size];
    CGFloat textX = (size.width - textSize.width) / 2.f;
    CGFloat textY = (size.height - textSize.height) / 2.f;
    CGRect textRect = CGRectMake(textX, textY, textSize.width,textSize.height);
    
    UIGraphicsBeginImageContext(size);
    [image drawInRect:rect];
    [attributeString drawInRect:textRect];
    UIImage *newImage =UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    
    return newImage;
}

+ (UIImage *)ellipseImage:(UIImage *)image withInset:(CGFloat)inset {
    return [self ellipseImage:image withInset:inset withBorderWidth:0 withBorderColor:[UIColor clearColor]];
}

+ (UIImage *)ellipseImage: (UIImage *) image withInset:(CGFloat)inset withBorderWidth:(CGFloat)width withBorderColor:(UIColor*)color {
    UIGraphicsBeginImageContext(image.size);
    CGContextRef context = UIGraphicsGetCurrentContext();
    CGRect rect = CGRectMake(inset, inset, image.size.width - inset * 2.f , image.size.height - inset * 2.f);
    
    CGContextAddEllipseInRect(context, rect);
    CGContextClip(context);
    [image drawInRect:rect];
    
    if (width > 0) {
        CGContextSetStrokeColorWithColor(context, color.CGColor);
        CGContextSetLineCap(context,kCGLineCapButt);
        CGContextSetLineWidth(context, width);
        CGRect rect2 = CGRectMake(inset + width/2, inset +  width/2, image.size.width - width- inset * 2.0f, image.size.height - width- inset * 2.0f);
        CGContextAddEllipseInRect(context, rect2);
        
        CGContextStrokePath(context);
    }
    
    UIImage *newimg = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    return newimg;
}

@end