增加换肤功能

Pods/AliyunOSSiOS/AliyunOSSSDK/NSData+OSS.m

@@ -0,0 +1,41 @@
+//
+//  NSData+OSS.m
+//  AliyunOSSSDK
+//
+//  Created by ws on 2023/12/28.
+//  Copyright © 2023 aliyun. All rights reserved.
+//
+
+#import "NSData+OSS.h"
+#import <CommonCrypto/CommonDigest.h>
+
+@implementation NSData (OSS)
+
+- (NSString *)hexString {
+    NSMutableString *hexString = [NSMutableString string];
+    Byte *byte = (Byte *)[self bytes];
+    for (int i = 0; i<[self length]; i++) {
+        [hexString appendFormat:@"%x", (*(byte + i) >> 4) & 0xf];
+        [hexString appendFormat:@"%x", *(byte + i) & 0xf];
+    }
+    return hexString;
+}
+
+- (NSData *)calculateSha256 {
+    unsigned char *digest = NULL;
+    
+    digest = malloc(CC_SHA256_DIGEST_LENGTH * sizeof(unsigned char));
+    memset(digest, 0x0, CC_SHA256_DIGEST_LENGTH);
+    CC_SHA256(self.bytes, (CC_LONG)self.length, digest);
+    
+    if (digest) {
+        NSData *data = [NSData dataWithBytes:digest length:CC_SHA256_DIGEST_LENGTH];
+        free(digest);
+        return data;
+    }
+    free(digest);
+    
+    return nil;
+}
+
+@end