blocks|key|286811|text|下面是一个将数据放入NSData对象的示例。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|286812|const+unsigned+char+bytes[]+=+{values+here};
NSData+*data+=+[NSData+dataWithBytes:bytes+length:sizeof(bytes)];
NSLog(@"%25@",+data);|code-block|syntax|javascript|286813|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

Here is an example of getting your data into a NSData object.

<pre><code>const unsigned char bytes[] = {values here};
NSData *data = [NSData dataWithBytes:bytes length:sizeof(bytes)];
NSLog(@"%@", data);
</code></pre>

blocks|key|503595|text|您必须首先将JSON转换为字符串数组；例如，您可以使用NSJSONSerialization+class|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|503596|NSArray+*strings+=+[NSJSONSerialization+JSONObjectWithData:theJSONString+options:kNilOptions+error:NULL];|code-block|syntax|javascript|503597|然后遍历字符串数组，将每个条目转换为整数，并将其添加到分配的字节指针/数组中：|503598|unsigned+c+=+strings.count;
uint8_t+*bytes+=+malloc(sizeof(*bytes)+*+c);

unsigned+i;
for+(i+=+0;+i+<+c;+i%2B%2B)
{
++++NSString+*str+=+[strings+objectAtIndex:i];
++++int+byte+=+[str+intValue];
++++bytes[i]+=+byte;
}|503599|最后，从字节中生成一个NSData，然后使用它初始化一个UIImage对象：|503600|NSData+*imageData+=+[NSData+dataWithBytesNoCopy:bytes+length:c+freeWhenDone:YES];
UIImage+*image+=+[UIImage+imageWithData:imageData];|503601|entityMap|0|LINK|mutability|MUTABLE|url|http://developer.apple.com/library/ios/#documentation/Foundation/Reference/NSJSONSerialization_Class/Reference/Reference.html^0|R|J|R|P|0|0|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|10|8|@$9|11|A|12|B|C]]|D|@$9|13|A|14|1|15]]|E|$]]|$1|F|3|G|5|H|7|16|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|17|8|@]|D|@]|E|$]]|$1|M|3|N|5|H|7|18|8|@]|D|@]|E|$I|J]]|$1|O|3|P|5|6|7|19|8|@]|D|@]|E|$]]|$1|Q|3|R|5|H|7|1A|8|@]|D|@]|E|$I|J]]|$1|S|3|-4|5|6|7|1B|8|@]|D|@]|E|$]]]|T|$U|$5|V|W|X|E|$Y|Z]]]]

You have to convert the JSON to an array of strings first; you can, for example, use the <a href="http://developer.apple.com/library/ios/#documentation/Foundation/Reference/NSJSONSerialization_Class/Reference/Reference.html"><code>NSJSONSerialization</code> class</a>:

<pre><code>NSArray *strings = [NSJSONSerialization JSONObjectWithData:theJSONString options:kNilOptions error:NULL];
</code></pre>

Then walk the strings array, convert each entry to an integer, and add it to an allocated byte pointer/array:

<pre><code>unsigned c = strings.count;
uint8_t *bytes = malloc(sizeof(*bytes) * c);

unsigned i;
for (i = 0; i &lt; c; i++)
{
 NSString *str = [strings objectAtIndex:i];
 int byte = [str intValue];
 bytes[i] = byte;
}
</code></pre>

Then finally make an NSData out of the bytes, then init an UIImage object using it:

<pre><code>NSData *imageData = [NSData dataWithBytesNoCopy:bytes length:c freeWhenDone:YES];
UIImage *image = [UIImage imageWithData:imageData];
</code></pre>

blocks|key|503613|text|下面是如何在Swift中做到这一点。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|503614|var+bytes:[Byte]+=+[137,+80,+78,+71,+13,+10,+26,+10,+0,+0,+0,+13,+73,+72,+68,+82,+0,+0,+0,+130,+0,+0,+0,+22,+8,+6,+0,+0,+0,+12,+244,+68,+168,+0,+0,+0,+1,+115,+82,+71,+66,+0,+174,+206,+28,+233,+0,+0,+0,+4,+103,+65,+77,+65,+0,+0,+177,+143,+11,+252,+97,+5,+0,+0,+0,+9,+112,+72,+89,+115,+0,+0,+14,+196,+0,+0,+14,+196,+1,+149,+43,+14,+27,+0,+0,+3,+212,+73,+68,+65,+84,+104,+67,+237,+153,+61,+139,+20,+65,+16,+134,+55,+17,+253,+3,+114,+127,+224,+208,+204,+64,+228,+18,+3,+19,+21,+19,+35,+217,+200,+204,+15,+48,+19,+228,+48,+50,+242,+76,+12,+245,+2,+99,+47,+55,+88,+83,+65,+220,+76,+48,+57,+19,+49,+220,+95,+224,+125,+120,+34,+126,+224,+120,+207,+65,+141,+53,+189,+213,+85,+189,+238,+172,+176,+210,+5,+195,+206,+77,+87,+87,+247,+84,+189,+245,+118,+213,+220,+160,+169,+82,+61,+112,+232,+129,+65,+245,+66,+245,+0,+30,+168,+64,+168,+56,+56,+242,+64,+5,+66,+5,+66,+5,+66,+197,+192,+31,+15,+12,+142,+29,+63,+209,+228,+174,+209,+232,+101,+199,+87,+147,+201,+36,+171,+139,+141,+55,+227,+113,+179,+122,+234,+180,+171,+115,+110,+109,+173,+217,+217,+217,+53,+99,+112,+241,+210,+229,+169,+185,+216,+244,+246,+88,+50,+134,+93,+145,+18,+125,+79,+231,+230,+173,+219,+217,+253,+47,+51,+176,+92,+32,+156,+92,+89,+233,+188,+219,+189,+245,+245,+16,+8,+219,+219,+239,+27,+230,+69,+206,+76,+157,+246,+112,+99,+99,+106,+14,+78,+71,+230,+13,+94,+159,+64,+96,+47,+218,+222,+50,+7,+95,+239,+221,+5,+2,+47,+77,+96,+17,+178,+56,+10,+48,+217,+139,+192,+36,+81,+240,+158,+111,+109,+181,+251,+176,+178,+30,+102,+233,+43,+139,+75,+128,+192,+187,+161,+39,+87,+196,+108,+226,+23,+15,+8,+223,+70,+47,+154,+131,+7,+247,+155,+253,+27,+215,+155,+79,+103,+86,+59,+23,+207,+24,+67,+71,+203,+175,+253,+189,+230,+235,+179,+39,+157,+235,+199,+187,+183,+13,+23,+250,+123,+195,+171,+71,+118,+248,+229,+111,+158,+91,+130,+221,+207,+119,+239,+52,+59,+231,+207,+154,+107,+179,+6,+107,+137,+132,+64,+128,+202,+145,+167,+155,+155,+97,+112,+5,+8,+232,+91,+25,+174,+193,+129,+227,+113,+38,+0,+179,+156,+206,+49,+84,+2,+132,+89,+51,+50,+7,+208,+52,+203,+217,+151,+7,+102,+253,+174,+233,+30,+126,+126,+252,+208,+6,+44,+5,+128,+245,+55,+65,+101,+14,+66,+96,+83,+29,+43,+152,+90,+231,+251,+235,+87,+237,+22,+176,+19,+233,+235,+185,+2,+196,+16,+8,+165,+103,+191,+232,+105,+167,+64,+237,+158,+51,+1,+217,+181,+225,+112,+74,+7,+16,+105,+241,+108,+244,+5,+4,+246,+66,+112,+229,+138,+128,+239,+49,+130,+100,+109,+9,+8,+68,+103,+247,+202,+133,+44,+16,+34,+59,+4,+94,+196,+2,+1,+207,+96,+32,+139,+153,+176,+13,+248,+90,+32,+224,+136,+156,+195,+117,+198,+122,+122,+105,+150,+144,+85,+158,+190,+181,+158,+117,+254,+70,+199,+140,+55,+158,+218,+155,+199,+150,+204,+245,+106,+4,+178,+211,+10,+28,+52,+205,+24,+23,+247,+150,+14,+99,+22,+35,+136,+46,+129,+204,+101,+59,+64,+128,+238,+83,+187,+28,+31,+233,+209,+147,+234,+0,+220,+22,+8,+81,+6,+136,+19,+60,+61,+139,+46,+75,+106,+11,+177,+205,+113,+97,+117,+20,+243,+4,+175,+111,+32,+68,+93,+131,+21,+12,+28,+157,+138,+197,+26,+204,+205,+29,+13,+114,+116,+96,+199,+2,+3,+243,+172,+140,+103,+29,+97,+3,+126,+249,+219,+154,+223,+2,+129,+5,+162,+2,+73,+186,+136,+92,+96,+114,+231,+38,+52,+90,+18,+204,+180,+93,+45,+169,+17,+116,+129,+103,+221,+75,+231,+81,+98,+43,+98,+22,+93,+183,+228,+142,+36,+11,+8,+60,+75,+37,+167,+103,+1,+1,+6,+209,+98,+129,+136,+121,+127,+115,+36,+9,+59,+116,+128,+16,+177,+130,+156,+221,+179,+2,+129,+151,+136,+90,+79,+198,+115,+242,+47,+106,+4,+214,+240,+186,+34,+41,+110,+163,+154,+164,+132,+158,+177,+1,+101,+167,+20,+157,+99,+132,+20,+72,+86,+230,+151,+50,+130,+102,+7,+125,+223,+1,+66,+196,+10,+146,+17,+139,+0,+66,+238,+35,+19,+123,+138,+170,+119,+93,+228,+165,+247,+227,+195,+2,+80,+23,+118,+158,+173,+40,+17,+116,+75,+59,+11,+35,+16,+112,+221,+38,+114,+111,+213,+8,+60,+183,+24,+161,+20,+8,+95,+30,+63,+10,+107,+4,+169,+37,+210,+22,+117,+10,+8,+57,+103,+80,+221,+71,+244,+234,+181,+84,+81,+59,+233,+101,+90,+201,+177,+18,+209,+122,+180,+119,+230,+35,+81,+167,+83,+242,+49,+105,+150,+246,+77,+3,+130,+190,+126,+30,+32,+48,+223,+90,+155,+35,+3,+144,+88,+44,+196,+250,+204,+153,+2,+2,+206,+176,+40,+178,+36,+171,+254,+7,+32,+148,+116,+58,+105,+123,+155,+130,+56,+151,+241,+94,+27,+40,+140,+49,+15,+16,+216,+199,+172,+107,+3,+2,+10,+209,+129,+20,+88,+250,+101,+96,+5,+93,+120,+105,+54,+64,+79,+198,+104,+13,+245,+189,+215,+91,+243,+37,+49,+87,+216,+201,+71,+171,+28,+43,+48,+47,+93,+43,+183,+7,+235,+185,+174,+63,+188,+226,+82,+214,+231,+61,+162,+34,+52,+250,+178,+136,+115,+115,+25,+168,+1,+129,+142,+238,+8,+184,+151,+234,+94,+126,+211,+175,+143,+100,+183,+238,+6,+244,+7,+41,+222,+1,+102,+64,+199,+99,+38,+198,+244,+145,+83,+255,+13,+29,+85,+127,+61,+140,+19,+92,+249,+76,+44,+191,+58,+248,+61,+44,+225,+154,+72,+215,+182,+148,+43,+16,+22,+29,+133,+37,+177,+95,+129,+176,+36,+129,+90,+244,+54,+43,+16,+22,+237,+225,+37,+177,+255,+27,+38,+183,+224,+140,+178,+26,+189,+95,+0,+0,+0,+0,+73,+69,+78,+68,+174,+66,+96,+130];

var+imageData:NSData+=+NSData(bytes:+bytes,+length:+bytes.count);
var+image:UIImage+=+UIImage(data:+imageData);
var+imageView:UIImageView+=+UIImageView(image:+image);|code-block|syntax|javascript|503615|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

and here's how to do it in Swift...

<pre><code>var bytes:[Byte] = [137, 80, 78, 71, 13, 10, 26, 10, 0, 0, 0, 13, 73, 72, 68, 82, 0, 0, 0, 130, 0, 0, 0, 22, 8, 6, 0, 0, 0, 12, 244, 68, 168, 0, 0, 0, 1, 115, 82, 71, 66, 0, 174, 206, 28, 233, 0, 0, 0, 4, 103, 65, 77, 65, 0, 0, 177, 143, 11, 252, 97, 5, 0, 0, 0, 9, 112, 72, 89, 115, 0, 0, 14, 196, 0, 0, 14, 196, 1, 149, 43, 14, 27, 0, 0, 3, 212, 73, 68, 65, 84, 104, 67, 237, 153, 61, 139, 20, 65, 16, 134, 55, 17, 253, 3, 114, 127, 224, 208, 204, 64, 228, 18, 3, 19, 21, 19, 35, 217, 200, 204, 15, 48, 19, 228, 48, 50, 242, 76, 12, 245, 2, 99, 47, 55, 88, 83, 65, 220, 76, 48, 57, 19, 49, 220, 95, 224, 125, 120, 34, 126, 224, 120, 207, 65, 141, 53, 189, 213, 85, 189, 238, 172, 176, 210, 5, 195, 206, 77, 87, 87, 247, 84, 189, 245, 118, 213, 220, 160, 169, 82, 61, 112, 232, 129, 65, 245, 66, 245, 0, 30, 168, 64, 168, 56, 56, 242, 64, 5, 66, 5, 66, 5, 66, 197, 192, 31, 15, 12, 142, 29, 63, 209, 228, 174, 209, 232, 101, 199, 87, 147, 201, 36, 171, 139, 141, 55, 227, 113, 179, 122, 234, 180, 171, 115, 110, 109, 173, 217, 217, 217, 53, 99, 112, 241, 210, 229, 169, 185, 216, 244, 246, 88, 50, 134, 93, 145, 18, 125, 79, 231, 230, 173, 219, 217, 253, 47, 51, 176, 92, 32, 156, 92, 89, 233, 188, 219, 189, 245, 245, 16, 8, 219, 219, 239, 27, 230, 69, 206, 76, 157, 246, 112, 99, 99, 106, 14, 78, 71, 230, 13, 94, 159, 64, 96, 47, 218, 222, 50, 7, 95, 239, 221, 5, 2, 47, 77, 96, 17, 178, 56, 10, 48, 217, 139, 192, 36, 81, 240, 158, 111, 109, 181, 251, 176, 178, 30, 102, 233, 43, 139, 75, 128, 192, 187, 161, 39, 87, 196, 108, 226, 23, 15, 8, 223, 70, 47, 154, 131, 7, 247, 155, 253, 27, 215, 155, 79, 103, 86, 59, 23, 207, 24, 67, 71, 203, 175, 253, 189, 230, 235, 179, 39, 157, 235, 199, 187, 183, 13, 23, 250, 123, 195, 171, 71, 118, 248, 229, 111, 158, 91, 130, 221, 207, 119, 239, 52, 59, 231, 207, 154, 107, 179, 6, 107, 137, 132, 64, 128, 202, 145, 167, 155, 155, 97, 112, 5, 8, 232, 91, 25, 174, 193, 129, 227, 113, 38, 0, 179, 156, 206, 49, 84, 2, 132, 89, 51, 50, 7, 208, 52, 203, 217, 151, 7, 102, 253, 174, 233, 30, 126, 126, 252, 208, 6, 44, 5, 128, 245, 55, 65, 101, 14, 66, 96, 83, 29, 43, 152, 90, 231, 251, 235, 87, 237, 22, 176, 19, 233, 235, 185, 2, 196, 16, 8, 165, 103, 191, 232, 105, 167, 64, 237, 158, 51, 1, 217, 181, 225, 112, 74, 7, 16, 105, 241, 108, 244, 5, 4, 246, 66, 112, 229, 138, 128, 239, 49, 130, 100, 109, 9, 8, 68, 103, 247, 202, 133, 44, 16, 34, 59, 4, 94, 196, 2, 1, 207, 96, 32, 139, 153, 176, 13, 248, 90, 32, 224, 136, 156, 195, 117, 198, 122, 122, 105, 150, 144, 85, 158, 190, 181, 158, 117, 254, 70, 199, 140, 55, 158, 218, 155, 199, 150, 204, 245, 106, 4, 178, 211, 10, 28, 52, 205, 24, 23, 247, 150, 14, 99, 22, 35, 136, 46, 129, 204, 101, 59, 64, 128, 238, 83, 187, 28, 31, 233, 209, 147, 234, 0, 220, 22, 8, 81, 6, 136, 19, 60, 61, 139, 46, 75, 106, 11, 177, 205, 113, 97, 117, 20, 243, 4, 175, 111, 32, 68, 93, 131, 21, 12, 28, 157, 138, 197, 26, 204, 205, 29, 13, 114, 116, 96, 199, 2, 3, 243, 172, 140, 103, 29, 97, 3, 126, 249, 219, 154, 223, 2, 129, 5, 162, 2, 73, 186, 136, 92, 96, 114, 231, 38, 52, 90, 18, 204, 180, 93, 45, 169, 17, 116, 129, 103, 221, 75, 231, 81, 98, 43, 98, 22, 93, 183, 228, 142, 36, 11, 8, 60, 75, 37, 167, 103, 1, 1, 6, 209, 98, 129, 136, 121, 127, 115, 36, 9, 59, 116, 128, 16, 177, 130, 156, 221, 179, 2, 129, 151, 136, 90, 79, 198, 115, 242, 47, 106, 4, 214, 240, 186, 34, 41, 110, 163, 154, 164, 132, 158, 177, 1, 101, 167, 20, 157, 99, 132, 20, 72, 86, 230, 151, 50, 130, 102, 7, 125, 223, 1, 66, 196, 10, 146, 17, 139, 0, 66, 238, 35, 19, 123, 138, 170, 119, 93, 228, 165, 247, 227, 195, 2, 80, 23, 118, 158, 173, 40, 17, 116, 75, 59, 11, 35, 16, 112, 221, 38, 114, 111, 213, 8, 60, 183, 24, 161, 20, 8, 95, 30, 63, 10, 107, 4, 169, 37, 210, 22, 117, 10, 8, 57, 103, 80, 221, 71, 244, 234, 181, 84, 81, 59, 233, 101, 90, 201, 177, 18, 209, 122, 180, 119, 230, 35, 81, 167, 83, 242, 49, 105, 150, 246, 77, 3, 130, 190, 126, 30, 32, 48, 223, 90, 155, 35, 3, 144, 88, 44, 196, 250, 204, 153, 2, 2, 206, 176, 40, 178, 36, 171, 254, 7, 32, 148, 116, 58, 105, 123, 155, 130, 56, 151, 241, 94, 27, 40, 140, 49, 15, 16, 216, 199, 172, 107, 3, 2, 10, 209, 129, 20, 88, 250, 101, 96, 5, 93, 120, 105, 54, 64, 79, 198, 104, 13, 245, 189, 215, 91, 243, 37, 49, 87, 216, 201, 71, 171, 28, 43, 48, 47, 93, 43, 183, 7, 235, 185, 174, 63, 188, 226, 82, 214, 231, 61, 162, 34, 52, 250, 178, 136, 115, 115, 25, 168, 1, 129, 142, 238, 8, 184, 151, 234, 94, 126, 211, 175, 143, 100, 183, 238, 6, 244, 7, 41, 222, 1, 102, 64, 199, 99, 38, 198, 244, 145, 83, 255, 13, 29, 85, 127, 61, 140, 19, 92, 249, 76, 44, 191, 58, 248, 61, 44, 225, 154, 72, 215, 182, 148, 43, 16, 22, 29, 133, 37, 177, 95, 129, 176, 36, 129, 90, 244, 54, 43, 16, 22, 237, 225, 37, 177, 255, 27, 38, 183, 224, 140, 178, 26, 189, 95, 0, 0, 0, 0, 73, 69, 78, 68, 174, 66, 96, 130];

var imageData:NSData = NSData(bytes: bytes, length: bytes.count);
var image:UIImage = UIImage(data: imageData);
var imageView:UIImageView = UIImageView(image: image);
</code></pre>

blocks|key|286918|text|在Swift中我有自己的方法|type|unstyled|depth|inlineStyleRanges|entityRanges|data|286919|if+let+serverBytesArray+=+serverAnswer+as?+NSArray+{
++++var+bytes:[Byte]+=+[]
++++for+serverByte+in+serverBytesArray+{
++++++++bytes.append(Byte(serverByte+as+UInt))
++++}
++++var+data+=+NSData(bytes:+bytes,+length:+bytes.count);
++++let+tmpDir+=+NSTemporaryDirectory()
++++data.writeToFile(tmpDir.stringByAppendingPathComponent("test.pdf"),+atomically:+true)
}|code-block|syntax|javascript|286920|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

I have my way to do it in Swift

<pre><code>if let serverBytesArray = serverAnswer as? NSArray {
 var bytes:[Byte] = []
 for serverByte in serverBytesArray {
 bytes.append(Byte(serverByte as UInt))
 }
 var data = NSData(bytes: bytes, length: bytes.count);
 let tmpDir = NSTemporaryDirectory()
 data.writeToFile(tmpDir.stringByAppendingPathComponent("test.pdf"), atomically: true)
}
</code></pre>

In a WebService JSON response is coming. In the response, there is image is coming as a byte array. I have to show the image in a UIImageView. I am trying to convert the byte array to NSData. But not getting how to do that. Any help would be appreciated.
I am confident that the byte array has image data in it.
Sample Byte array for your reference:

<pre><code> (137,
 80,
 78,
 71,
 ...
 66,
 96,
 130)
</code></pre>

Thanks

Byte Array to NSData

Swift

JSON

在WebService中，JSON响应即将到来。在响应中，图像以字节数组的形式出现。我必须在UIImageView中显示图像。我正在尝试将字节数组转换为NSData。但是不知道该怎么做。任何帮助都将不胜感激。我确信字节数组中包含图像数据。示例Byte数组供您参考：        (137,        80,    ...

问字节数组转换为NSData
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