jianbinglian/Jianbinglian/Category(分类扩展)/UIImage+MT.m

//
//  UIImage+MT.m
//  ADuTechnology
//
//  Created by Simon on 2019/9/28.
//  Copyright © 2019 Simon. All rights reserved.
//

#import "UIImage+MT.h"

@implementation UIImage (MT)
//压缩图片
- (NSData *)compressQualityWithMaxLength:(NSInteger)maxLength {
    CGFloat compression = 1;
    NSData *data = UIImageJPEGRepresentation(self, compression);
    if (data.length < maxLength) return data;
    CGFloat max = 1;
    CGFloat min = 0;
    for (int i = 0; i < 12; ++i) {
        compression = (max + min) / 2;
        data = UIImageJPEGRepresentation(self, compression);
        if (data.length < maxLength * 0.9) {
            min = compression;
        } else if (data.length > maxLength) {
            max = compression;
        } else {
            break;
        }
    }
    return data;
}
@end