KWMImageUtil.m

//
// Created by Yaotian on 2/7/14.
// Copyright (c) 2014 Kollway Mobile. All rights reserved.
//

#import "KWMImageUtil.h"
#import "KWMStringUtil.h"


@implementation KWMImageUtil {
    
}

+ (UIImage *)createTransparentImage {
    UIImage *result = nil;
    
    CGRect rect = CGRectMake(0, 0, 1, 1);
    UIGraphicsBeginImageContextWithOptions(rect.size, NO, 0.0);
    result = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    
    return result;
}


+ (UIImage *)createColorImage:(UIColor *)color pixelSize:(CGSize)size {
    UIImage *result = nil;
    
    CGRect rect = CGRectMake(0, 0, 0, 0);
    rect.size = size;
    UIGraphicsBeginImageContextWithOptions(rect.size, NO, 0.0);
    [color setFill];
    UIRectFill(rect); // Fill it with your color
    result = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    
    return result;
}

+ (UIImage *)createColorImage:(UIColor *)color {
    return [self createColorImage:color pixelSize:CGSizeMake(1, 1)];
}

+ (UIImage *)createGradientImage:(UIColor *)startColor endColor:(UIColor *)endColor size:(CGSize)size {
    UIImage *result = nil;
    
    UIGraphicsBeginImageContextWithOptions(size, NO, 0.0);
    CGContextRef currentContext = UIGraphicsGetCurrentContext();
    
    CGColorSpaceRef rgbColorspace = CGColorSpaceCreateDeviceRGB();
    
    size_t num_locations = 2;
    CGFloat locations[2] = { 0.0, 1.0 };
    CGFloat r0;
    CGFloat g0;
    CGFloat b0;
    CGFloat a0;
    CGFloat r1;
    CGFloat g1;
    CGFloat b1;
    CGFloat a1;
    [startColor getRed:&r0 green:&g0 blue:&b0 alpha:&a0];
    [endColor getRed:&r1 green:&g1 blue:&b1 alpha:&a1];
    CGFloat components[8] = {
        r0, g0, b0, a0,   // Start color
        r1, g1, b1, a1 }; // End color
    CGGradientRef gradient = CGGradientCreateWithColorComponents(rgbColorspace, components, locations, num_locations);
    CGContextDrawLinearGradient(currentContext, gradient, CGPointMake(0, 0), CGPointMake(0, size.height), 0);
    
    result = UIGraphicsGetImageFromCurrentImageContext();
    CGGradientRelease(gradient);
    CGColorSpaceRelease(rgbColorspace);
    
    return result;
}

// 计算文件大小，单位KB
+ (float)fileSizeAtPath:(NSString*)filePath{
    NSFileManager *manager = [NSFileManager defaultManager];
    if ([manager fileExistsAtPath:filePath]){
        return [[manager attributesOfItemAtPath:filePath error:nil] fileSize]/1024.0;
    }
    return 0;
}

+ (BOOL)saveJPGImageToFile:(NSString *)filePath image:(UIImage *)image {
    NSData *data = UIImageJPEGRepresentation(image, .8f);
    return [data writeToFile:filePath atomically:YES];
}

+ (BOOL)savePNGImageToFile:(NSString *)filePath image:(UIImage *)image {
    NSData *data = UIImagePNGRepresentation(image);
    return [data writeToFile:filePath atomically:YES];
}

+ (UIImage *)getImageFromFile:(NSString *)filePath {
    NSData *data = [NSData dataWithContentsOfFile:filePath];
    return [UIImage imageWithData:data];
}

+ (void)deleteLocalImage:(NSString *)imagePath {
    if (imagePath == nil || imagePath.length <= 0) {
        return;
    }
    NSFileManager *fileManager = [NSFileManager defaultManager];
    if ([fileManager fileExistsAtPath:imagePath]) {
        NSError *error;
        [fileManager removeItemAtPath:imagePath error:&error];
    }
}

+ (UIImage *)imageWithImage:(UIImage *)image scaledToPixelSize:(CGSize)newSize{
    UIGraphicsBeginImageContext(newSize);
    [image drawInRect:CGRectMake(0, 0, newSize.width, newSize.height)];
    UIImage *newImage = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    return newImage;
}

+ (UIImage *)imageAfterZoom:(UIImage *)image scale:(float)scale {
    float newWidth = image.size.width * scale;
    float newHeight = image.size.height * scale;
    CGSizeMake(newWidth, newHeight);
    return [self imageWithImage:image scaledToPixelSize:CGSizeMake(newWidth, newHeight)];
}

+ (NSArray *)checkImage:(NSArray *)imagesArray{
    NSMutableArray *images = [[NSMutableArray alloc] initWithCapacity:100];
    if(imagesArray == nil){
        return [images copy];
    }
    for(KWMImage *image in imagesArray){
        if(image!=nil && ![KWMStringUtil isEmpty:image.value]){
            if( [image.value rangeOfString:@"jpg" options:NSCaseInsensitiveSearch].location!=NSNotFound
               ||
               [image.value rangeOfString:@"jpeg" options:NSCaseInsensitiveSearch].location!=NSNotFound
               ||
               [image.value rangeOfString:@"png" options:NSCaseInsensitiveSearch].location!=NSNotFound
               ||
               [image.value rangeOfString:@"gif" options:NSCaseInsensitiveSearch].location!=NSNotFound
               ){
                [images addObject:image];
            }
        }
    }
    return [images copy];
}


+ (NSString *)getProductImageUrl:(NSNumber *)productId ImageSize:(NSInteger)ImageSize{
    if(productId == nil){
        return nil;
    }
    
    //https://og95hd6ay.qnssl.com/5411820230-1.jpg
    NSString *domain = Image_Domain;
    NSString *imageUrl = [NSString stringWithFormat:@"https://%@/%@-1.jpg",domain,productId.stringValue];
    NSLog(@"1-----%@", imageUrl);
    if(ImageSize == BigImage){
        return [self getImage:1080 height:1080 image:imageUrl];
    }else if(ImageSize == SmallImage){
        return [self getImage:300 height:300 image:imageUrl];
    }else{
        return [self getImage:500 height:500 image:imageUrl];
    }
}

//content:5411820230-1.jpg 商品详细获取图片的方法
+ (NSString *)getProductImageUrl2:(NSString *)content ImageSize:(NSInteger)ImageSize{
    if([KWMStringUtil isEmpty:content]){
        return nil;
    }
    
    //https://og95hd6ay.qnssl.com/5411820230-1.jpg
    NSString *domain = Image_Domain;
    NSString *imageUrl = [NSString stringWithFormat:@"https://%@/%@",domain,content];
    NSLog(@"2-----%@", imageUrl);
    if(ImageSize == BigImage){
        return [self getImage:1000 height:1000 image:imageUrl];
    }else if(ImageSize == SmallImage){
        return [self getImage:300 height:300 image:imageUrl];
    }else{
        return [self getImage:500 height:500 image:imageUrl];
    }
}

+ (NSString *)getProductImageUrl3:(NSNumber *)productId ImageSize:(NSInteger)ImageSize Position:(NSInteger)Position{
    if(productId == nil){
        return nil;
    }
    //https://og95hd6ay.qnssl.com/5411820230-1.jpg
    NSString *domain = Image_Domain;
    NSString *imageUrl = [NSString stringWithFormat:@"https://%@/%@-%ld.jpg",domain,productId.stringValue,(long)Position];
    NSLog(@"3-----%@", imageUrl);
    if(ImageSize == BigImage){
        return [self getImage:1080 height:1080 image:imageUrl];
    }else if(ImageSize == SmallImage){
        return [self getImage:300 height:300 image:imageUrl];
    }else{
        return [self getImage:500 height:500 image:imageUrl];
    }
}

+(NSString *)getImage:(NSInteger)width height:(NSInteger)height image:(NSString*)image{
    NSString *imageUrl = @"";
    
//    
//    NSCalendar *calendar = [NSCalendar currentCalendar];
//    NSDate *now = [NSDate date];
//    NSDateComponents *components = [calendar components:NSCalendarUnitYear|NSCalendarUnitMonth|NSCalendarUnitDay fromDate:now];
//    NSDate *startDate = [calendar dateFromComponents:components];
//    long long time = [startDate timeIntervalSince1970];
    
    if([KWMStringUtil isEmpty:image]){
        return imageUrl;
    }
    
    NSDateFormatter *dateformat = [[NSDateFormatter alloc] init];
    [dateformat setDateFormat:@"YYYY-MM-dd"];
    NSString *today = [dateformat stringFromDate:[NSDate date]];
    [dateformat setDateFormat:@"YYYY-MM-dd HH:mm:ss"];
    NSDate *date = [dateformat dateFromString:[NSString stringWithFormat:@"%@ 00:00:00",today]];
    NSTimeInterval interval = [date timeIntervalSince1970]/100;
    long long  time = interval;
    
    imageUrl = [[NSString alloc] initWithFormat:@"%@?imageView2/1/w/%ld/h/%ld&_=%llu",image,(long)width,(long)height,time];
    
    NSLog(@"---4--%@", imageUrl);

    return imageUrl;
}


@end