iPhone程序中将内容分享到新浪微博

因为要用到，所以找来，和大家分享：

1. 首先在http://open.t.sina.com.cn/中申请成为开发者，再创建不同的应用，获得相应的App Key （在下面链接中的source即为app key）

2. 登录认证：

NSString *authString = [NSString stringWithFormat:@"%@:%@",sinaIDField.text,sinaPasswordField.text];

NSData *authData = [authString dataUsingEncoding:NSUTF8StringEncoding];

NSString *authValue = [NSString stringWithFormat:@"Basic %@",[authData base64EncodingWithLineLength:80]];

NSURL *url = [NSURL URLWithString:@"http://api.t.sina.com.cn/account/verify_credentials.xml?source=3930264715"];

NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL:url];

[request setHTTPMethod:@"GET"];

[request setValue:authValue forHTTPHeaderField:@"Authorization"];

NSURLResponse *response;

NSError *error;

[NSURLConnection sendSynchronousRequest:request returningResponse:&response error:&error];

[request release];

NSHTTPURLResponse *httpResponse = (NSHTTPURLResponse *)response;

int statusCode = [httpResponse statusCode];

NSLog(@"status code = %d",statusCode);

if (statusCode != 200) {

alertTitle = @"帐号或密码错误";

alertMassage = @"请您输入正确的帐号和密码！";

}else {

alertTitle = @"";

alertMassage = @"登录成功！";

}

}

UIAlertView *alert = [[UIAlertView alloc] initWithTitle:alertTitle

message:alertMassage

delegate:nil cancelButtonTitle:@"确定"

otherButtonTitles:nil];

[alert show];

[alert release];

3.将内容（图片 文字）发送到新浪微博

NSString *authString = [NSString stringWithFormat:@"%@:%@",[[NSUserDefaults standardUserDefaults] objectForKey:@"sinaID"],[[NSUserDefaults standardUserDefaults] objectForKey:@"sinaPassword"]];

NSData *authData = [authString dataUsingEncoding:NSUTF8StringEncoding];

NSString *authValue = [NSString stringWithFormat:@"Basic %@",[authData base64EncodingWithLineLength:80]];

NSString *boundary = @"0xKhTmLbOuNdArYckkk";

NSString *filename = @"test.jpg";

NSData *imageData = UIImageJPEGRepresentation(shareImage,1);

NSString *bodyPrefixString = [NSString stringWithFormat:@"--%@rn", boundary];

NSString *bodySuffixString = [NSString stringWithFormat:@"rn--%@--rn", boundary];

NSString *contentDisposition = [NSString stringWithFormat:@"Content-Disposition: form-data; name="pic"; filename="%@"rn", filename];

NSString *contentImageType = [NSString stringWithFormat:@"Content-Type: image/%@rn", [filename pathExtension]];

NSString *contentTransfer = @"Content-Transfer-Encoding: binaryrnrn";

NSString *bodyUpdateField = [NSString stringWithFormat:@"Content-Disposition: form-data;name="status"rnrn%@rn",[NSString stringWithFormat:@"%@",textView.text]];

NSMutableData *postBody = [NSMutableData data];

[postBody appendData:[bodyPrefixString dataUsingEncoding:NSUTF8StringEncoding allowLossyConversion:NO]];

[postBody appendData:[bodyUpdateField dataUsingEncoding:NSUTF8StringEncoding ]];

[postBody appendData:[bodyPrefixString dataUsingEncoding:NSUTF8StringEncoding allowLossyConversion:NO]];

[postBody appendData:[contentDisposition dataUsingEncoding:NSUTF8StringEncoding ]];

[postBody appendData:[contentImageType dataUsingEncoding:NSUTF8StringEncoding ]];

[postBody appendData:[contentTransfer dataUsingEncoding:NSUTF8StringEncoding]];

[postBody appendData:imageData];

[postBody appendData:[bodySuffixString dataUsingEncoding:NSUTF8StringEncoding allowLossyConversion:NO]];

NSString *baseURL = [NSString stringWithFormat:@"http://api.t.sina.com.cn/statuses/upload.xml?source=3930264715"];

NSURL *url = [NSURL URLWithString:baseURL];

NSMutableURLRequest *mainRequest = [[NSMutableURLRequest alloc] initWithURL:url

cachePolicy:NSURLRequestUseProtocolCachePolicy

timeoutInterval:30.0f];

[mainRequest setHTTPMethod:@"POST"];

[mainRequest setValue:authValue forHTTPHeaderField:@"Authorization"];

NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; boundary=%@", boundary, nil];

[mainRequest setValue:contentType forHTTPHeaderField:@"Content-Type"];

[mainRequest setHTTPBody:postBody];

NSURLResponse *shareResponse;

NSError *error;

NSData *responseData = [NSURLConnection sendSynchronousRequest:mainRequest returningResponse:&shareResponse error:&error];

NSString *responseString = [[NSString alloc] initWithData:responseData encoding:NSUTF8StringEncoding];

NSHTTPURLResponse *httpResponse = (NSHTTPURLResponse *)shareResponse;

int statusCode = [httpResponse statusCode];

NSLog(@"status code = %d",statusCode);

BOOL succeed = NO;

if (statusCode == 200) {

succeed = YES;

}

[mainRequest release];

NSLog(@"response string : %@",responseString);

[responseString release];

[uploadWaiting stopAnimating];

NSString *message = nil;

if (succeed) {

message = @"分享成功";

}else {

message = @"分享失败";

}

UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"" message:message

delegate:self

cancelButtonTitle:@"确定" otherButtonTitles:nil];

[alert show];

[alert release];

ps:苹果不支持64位编码格式，所以需要自己编写编码方法

static char encodingTable[64] = {

'A','B','C','D','E','F','G','H','I','J','K','L','M','N','O','P',

'Q','R','S','T','U','V','W','X','Y','Z','a','b','c','d','e','f',

'g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v',

'w','x','y','z','0','1','2','3','4','5','6','7','8','9','+','/'

};

- (NSString *) base64EncodingWithLineLength:(unsigned int) lineLength data:(NSData *)dataObject {

const unsigned char *bytes = [dataObject bytes];

NSMutableString *result = [NSMutableString stringWithCapacity:[dataObject length]];

unsigned long ixtext = 0;

unsigned long lentext = [dataObject length];

long ctremaining = 0;

unsigned char inbuf[3], outbuf[4];

short i = 0;

short charsonline = 0, ctcopy = 0;

unsigned long ix = 0;

while( YES ) {

ctremaining = lentext - ixtext;

if( ctremaining <= 0 ) break;

for( i = 0; i < 3; i++ ) {

ix = ixtext + i;

if( ix < lentext ) inbuf[i] = bytes[ix];

else inbuf [i] = 0;

}

outbuf [0] = (inbuf [0] & 0xFC) >> 2;

outbuf [1] = ((inbuf [0] & 0x03) << 4) | ((inbuf [1] & 0xF0) >> 4);

outbuf [2] = ((inbuf [1] & 0x0F) << 2) | ((inbuf [2] & 0xC0) >> 6);

outbuf [3] = inbuf [2] & 0x3F;

ctcopy = 4;

switch( ctremaining ) {

case 1:

ctcopy = 2;

break;

case 2:

ctcopy = 3;

break;

}

for( i = 0; i < ctcopy; i++ )

[result appendFormat:@"%c", encodingTable[outbuf[i]]];

for( i = ctcopy; i < 4; i++ )

[result appendString:@"="];

ixtext += 3;

charsonline += 4;

if( lineLength > 0 ) {

if (charsonline >= lineLength) {

charsonline = 0;

[result appendString:@"/n"];

}

}

}

return [NSString stringWithString:result];

}