#define KCompressibilityFactor 1280.00
@implementationWeChatJPEGImager
#pragma mark - 压缩一张图片 最大宽高1280 类似于微信算法
- (UIImage*)getJPEGImagerImg:(UIImage*)image{
CGFloat oldImg_WID = image.size.width;
CGFloat oldImg_HEI = image.size.height;
//CGFloat aspectRatio = oldImg_WID/oldImg_HEI;//宽高比
if(oldImg_WID > KCompressibilityFactor || oldImg_HEI > KCompressibilityFactor){
//超过设置的最大宽度 先判断那个边最长
if(oldImg_WID > oldImg_HEI){
//宽度大于高度
oldImg_HEI = (KCompressibilityFactor* oldImg_HEI)/oldImg_WID;
oldImg_WID = KCompressibilityFactor;
}else{
oldImg_WID = (KCompressibilityFactor* oldImg_WID)/oldImg_HEI;
oldImg_HEI = KCompressibilityFactor;
}
}
UIImage*newImg = [selfimageWithImage:imagescaledToSize:CGSizeMake(oldImg_WID, oldImg_HEI)];
NSData*dJpeg =nil;
if(UIImagePNGRepresentation(newImg)==nil) {
dJpeg = UIImageJPEGRepresentation(newImg,0.5);
}else{
dJpeg = UIImagePNGRepresentation(newImg);
}
return[UIImageimageWithData:dJpeg];
}
#pragma mark - 压缩多张图片 最大宽高1280 类似于微信算法
- (NSArray*)getJPEGImagerImgArr:(NSArray*)imageArr{
NSMutableArray*newImgArr = [NSMutableArraynew];
for(inti =0; i
UIImage*newImg = [selfgetJPEGImagerImg:imageArr[i]];
[newImgArraddObject:newImg];
}
returnnewImgArr;
}
#pragma mark - 压缩一张图片 自定义最大宽高
- (UIImage*)getJPEGImagerImg:(UIImage*)imagecompressibilityFactor:(CGFloat)compressibilityFactor{
CGFloat oldImg_WID = image.size.width;
CGFloat oldImg_HEI = image.size.height;
//CGFloat aspectRatio = oldImg_WID/oldImg_HEI;//宽高比
if(oldImg_WID > compressibilityFactor || oldImg_HEI > compressibilityFactor){
//超过设置的最大宽度 先判断那个边最长
if(oldImg_WID > oldImg_HEI){
//宽度大于高度
oldImg_HEI = (compressibilityFactor* oldImg_HEI)/oldImg_WID;
oldImg_WID = compressibilityFactor;
}else{
oldImg_WID = (compressibilityFactor* oldImg_WID)/oldImg_HEI;
oldImg_HEI = compressibilityFactor;
}
}
UIImage*newImg = [selfimageWithImage:imagescaledToSize:CGSizeMake(oldImg_WID, oldImg_HEI)];
NSData*dJpeg =nil;
if(UIImagePNGRepresentation(newImg)==nil) {
dJpeg = UIImageJPEGRepresentation(newImg,0.5);
}else{
dJpeg = UIImagePNGRepresentation(newImg);
}
return[UIImageimageWithData:dJpeg];
}
#pragma mark - 压缩多张图片 自定义最大宽高
- (NSArray*)getJPEGImagerImgArr:(NSArray*)imageArrcompressibilityFactor:(CGFloat)compressibilityFactor{
NSMutableArray*newImgArr = [NSMutableArraynew];
for(inti =0; i
UIImage*newImg = [selfgetJPEGImagerImg:imageArr[i]compressibilityFactor:compressibilityFactor];
[newImgArraddObject:newImg];
}
returnnewImgArr;
}
#pragma mark - 根据宽高压缩图片
- (UIImage*)imageWithImage:(UIImage*)imagescaledToSize:(CGSize)newSize{
UIGraphicsBeginImageContext(newSize);
[imagedrawInRect:CGRectMake(0,0,newSize.width,newSize.height)];
UIImage* newImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
returnnewImage;
}