小编Cyl*_*lon的帖子

在iOS中有使用ECC的示例吗？

我注意到Apple Developer Documents中的kSecAttrKeyTypeEC,但是我不能将它用于通用密钥对.

下面的代码是从示例CryptoExercise修改的

// Container dictionaries.
NSMutableDictionary * privateKeyAttr = [[NSMutableDictionary alloc] init];
NSMutableDictionary * publicKeyAttr = [[NSMutableDictionary alloc] init];
NSMutableDictionary * keyPairAttr = [[NSMutableDictionary alloc] init];

// Set top level dictionary for the keypair.
[keyPairAttr setObject:(id)kSecAttrKeyTypeEC forKey:(id)kSecAttrKeyType];
[keyPairAttr setObject:[NSNumber numberWithUnsignedInteger:keySize] forKey:(id)kSecAttrKeySizeInBits];

// Set the private key dictionary.
[privateKeyAttr setObject:[NSNumber numberWithBool:YES] forKey:(id)kSecAttrIsPermanent];
[privateKeyAttr setObject:privateTag forKey:(id)kSecAttrApplicationTag];
// See SecKey.h to set other flag values.

// Set the public key dictionary.
[publicKeyAttr setObject:[NSNumber numberWithBool:YES] forKey:(id)kSecAttrIsPermanent];
[publicKeyAttr setObject:publicTag forKey:(id)kSecAttrApplicationTag];
// See …

我使用示例GLImageProcessing,但它不能处理亮度和对比度的图像,所以我编写代码来调整亮度和对比度,但它根本无法工作,任何人都可以帮助我这个,谢谢供审查

//init
glMatrixMode(GL_PROJECTION);
glLoadIdentity();
glOrthof(0, wide, 0, high, -1, 1);
glMatrixMode(GL_MODELVIEW);
glLoadIdentity();
glScalef(wide, high, 1);    
glBindTexture(GL_TEXTURE_2D, Input.texID);


//bind result fbo
glBindFramebufferOES(GL_FRAMEBUFFER_OES, resultFBO);
glViewport(0, 0, result.wide*result.s, result.high*result.t);
glClear(GL_COLOR_BUFFER_BIT);
glDisable(GL_BLEND);



//process 1 adjust brightness
float t = 1.2;
glVertexPointer  (2, GL_FLOAT, sizeof(V2fT2f), &flipquad[0].x);
glTexCoordPointer(2, GL_FLOAT, sizeof(V2fT2f), &flipquad[0].s);
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_COMBINE);

static GLfloat constColor[4] = { 0.1, 0.2, 0.3, 0.4 };
if (t > 1.0f)
{
    glTexEnvi(GL_TEXTURE_ENV, GL_COMBINE_RGB,      GL_ADD);
    //glColor4f(t-1, t-1, t-1, t-1);
    constColor[0] = t-1;
    constColor[1] = t-1;
    constColor[2] = t-1;
    constColor[3] …

使用

qmake -spec macx-xcode

只能生成较旧版本的test.pbproj，并且无法在xcode 4中打开

如何生成test.xcodeproj