在Objective-C中替换字符串中的多个字符？

NSString *originalString = @"Hello, World!";
NSMutableString *mutableString = [originalString mutableCopy];

// 替换字符串中的多个字符
[mutableString replaceOccurrencesOfString:@"o" withString:@"0" options:0 range:NSMakeRange(0, mutableString.length)];

// 将修改后的字符串转换回NSString
NSString *modifiedString = [mutableString copy];

NSLog(@"Original String: %@", originalString);
NSLog(@"Modified String: %@", modifiedString);