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ios 数组转化 nsDAtA

char buf[]="123456"; NSData *bufObj=[NSData dataWithBytes:(const void *)buf length:sizeof buf]; if(bufObj==nil) NSLog(@"failed to create obj"); else { NSMutableArray *marr=[NSMutableArray array]; [marr addObject:bufObj]; NSArra...

#import @interface NSObject (JSONCategories) /** * 描述:将NSArray或者NSDictionary转化为NSData * 参数: * 返回值:转化后的NSData * */ -(NSData*)JSONData; /** * 描述:将NSArray或者NSDictionary转化为NSString * 参数: * 返回值:转...

1. 这是最快的方法(但相当危险),以获得数组: unsigned char *bytesArray = data.bytes; NSUInteger lengthOfBytesArray = data.length; 试图让字节#100之前,你应该检查lengthOfBytesArray这样的: if (lengthOfBytesArray > 100 + 1) { un...

IOS数组可以转换车json对象,转换代码: NSString *str = nil; //字符串 NSMutableString *string = [[NSMutableString alloc] init]; [string appendString:@"xxxx"]; str = [string JSONString]; NSLog(@"str1:%@",[NSString stringWithString...

Byte数组-> NSData Byte byte[] = {0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,20,21,22,23}; NSData *adata = [[NSData alloc] initWithBytes:byte length:24]; NSData-> NSString NSString *aString = [[NSString alloc] initWithD...

NSData *data = [NSData new]; /*不可变数组*/ NSArray *array = @[data]; /*可变数组*/ NSMutableArray *mutableArray = [NSMutableArray array]; //添加元素 [mutableArray addObject:data];

NSString *str = @"AA21f0c1762a3abc299c013abe7dbcc50001DD"; NSData* bytes = [str dataUsingEncoding:NSUTF8StringEncoding]; Byte * myByte = (Byte *)[bytes bytes]; NSLog(@"myByte = %s",myByte);

/*! * @brief 把格式化的JSON格式的字符串转换成字典 * @param jsonString JSON格式的字符串 * @return 返回字典 */ + (NSDictionary *)dictionaryWithJsonString:(NSString *)jsonString { if (jsonString == nil) { return nil; } NSData *jso...

1. 我猜,打印机将不会采取任何图像格式?然而,这里是你如何可以将图像转换为字节数组,希望这将有助于:NSData *data = [NSData dataWithContentsOfFile:imagePath]; NSUInteger length = [data length]; Byte *bytes = (Byte*)malloc(length)...

图片转成NSData是一个bety数组 你把nsdata强制转成一个data,这里就应该不是bety数组了吧

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