NSString 与 NSData 之间的互转 NSData 与 UIImage 之间互转 NSDate 与 NSString 之间的互转

来源：互联网发布：linux文件重命名编辑：程序博客网时间：2024/06/01 07:47

//NSString 与 NSData 之间的互转    //NSString *str = @"你好";    //NSData *data = [str dataUsingEncoding:NSUTF8StringEncoding];    //NSString *STR = [[NSString alloc]initWithData:data encoding:NSUTF8StringEncoding];        //NSData 与 UIImage 之间互转    //NSData *data = UIImagePNGRepresentation(<#UIImage * _Nonnull image#>)    //NSData *data = UIImageJPEGRepresentation(<#UIImage * _Nonnull image#>, <#CGFloat compressionQuality#>)    //UIImage *image = [UIImage imageWithData:<#(nonnull NSData *)#>];        //NSDate 与 NSString 之间的互转

    //NSDate *date1 = [NSDate date<span style="font-family: Arial, Helvetica, sans-serif;">];</span>

    //NSDateFormatter *DATEFormatter = [[NSDateFormatter alloc] init];    //[DATEFormatter setDateFormat:@"yyyy-MM-dd HH:mm:ss"]        //NSString *dateStr = [DATEFormatter stringFromDate:date1]    //NSDate = [DATEFormatter dateFromString:String]

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