YYXC_Coach/JSJPCoach/Category/UIImage+Setter.m

//
//  UIImage+resize.m
//  test23
//
//  Created by apple on 15/12/1.
//  Copyright (c) 2015年 JCZ. All rights reserved.
//

#import "UIImage+Setter.h"

@implementation UIImage(Setter)

-(UIImage *)reduceImage:(UIImage *)image percent:(float)percent
{
    NSData *imageData = UIImageJPEGRepresentation(image, percent);
    UIImage *newImage = [UIImage imageWithData:imageData];
    return newImage;
}
//压缩图片尺寸
- (UIImage*)scaledToSize:(CGSize)newSize
{
    //首先要找到缩放比？
    CGFloat rate =newSize.width*1.0/ self.size.width ;
    if (self.size.height* rate > newSize.height) {
        //过长了。
        rate =newSize.height*1.0/ self.size.height ;
    }
    CGSize size = CGSizeMake(self.size.width*rate, self.size.height*rate);
    
    // Create a graphics image context
    UIGraphicsBeginImageContext(size);
    // new size
    [self drawInRect:CGRectMake(0,0,size.width,size.height)];
    // Get the new image from the context
    UIImage* newImage = UIGraphicsGetImageFromCurrentImageContext();
    
    // End the context
    UIGraphicsEndImageContext();
    // Return the new image.
    return newImage;
}

- (UIImage*)scaledToWid:(CGFloat)width
{
    //首先要找到缩放比？
    CGFloat rate =width*1.0/ self.size.width ;
    if (self.size.height* rate > width) {
        //过长了。
        rate =width*1.0/ self.size.height ;
    }
    CGSize size = CGSizeMake(self.size.width*rate, self.size.height*rate);
    UIGraphicsBeginImageContext(size);
    [self drawInRect:CGRectMake(0,0,size.width,size.height)];
    UIImage* newImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    return newImage;
}

/**
 *  修改图片的大小
 */
-(UIImage*)originImageScaleToSize:(CGSize)size
{
    UIGraphicsBeginImageContext(size);  //size 为CGSize类型，即你所需要的图片尺寸
    
    [self drawInRect:CGRectMake(0, 0, size.width, size.height)];
    
    UIImage* scaledImage = UIGraphicsGetImageFromCurrentImageContext();
    
    UIGraphicsEndImageContext();
    
    return scaledImage;   //返回的就是已经改变的图片
}


#pragma mark -  改变照片颜色
// Tint: Color
-(UIImage*)tint:(UIColor*)color {
    return [self rt_tintedImageWithColor:color level:1.0f];
}

// Tint: Color + level
-(UIImage*)rt_tintedImageWithColor:(UIColor*)color level:(CGFloat)level {
    CGRect rect = CGRectMake(0.0f, 0.0f, self.size.width, self.size.height);
    return [self rt_tintedImageWithColor:color rect:rect level:level];
}

// Tint: Color + Rect
-(UIImage*)rt_tintedImageWithColor:(UIColor*)color rect:(CGRect)rect {
    return [self rt_tintedImageWithColor:color rect:rect level:1.0f];
}

// Tint: Color + Rect + level
-(UIImage*)rt_tintedImageWithColor:(UIColor*)color rect:(CGRect)rect level:(CGFloat)level {
    CGRect imageRect = CGRectMake(0.0f, 0.0f, self.size.width, self.size.height);
    
    UIGraphicsBeginImageContextWithOptions(imageRect.size, NO, self.scale);
    CGContextRef ctx = UIGraphicsGetCurrentContext();
    
    [self drawInRect:imageRect];
    
    CGContextSetFillColorWithColor(ctx, [color CGColor]);
    CGContextSetAlpha(ctx, level);
    CGContextSetBlendMode(ctx, kCGBlendModeSourceAtop);
    CGContextFillRect(ctx, rect);
    
    CGImageRef imageRef = CGBitmapContextCreateImage(ctx);
    UIImage *darkImage = [UIImage imageWithCGImage:imageRef
                                             scale:self.scale
                                       orientation:self.imageOrientation];
    CGImageRelease(imageRef);
    
    UIGraphicsEndImageContext();
    
    return darkImage;
}



@end