//截屏
-(void)writeFile
{
//系统沙盒路径
NSArray *paths =NSSearchPathForDirectoriesInDomains(NSCachesDirectory,NSUserDomainMask,YES);
NSString *cachesDirectory = [paths objectAtIndex:0];
NSString*imgFilePath =nil;
if (UI_USER_INTERFACE_IDIOM()==UIUserInterfaceIdiomPad)
{
imgFilePath = [[NSStringalloc]
initWithFormat:@"%@/myScreen_iPad.png",cachesDirectory];
}
else {
imgFilePath = [[NSStringalloc]
initWithFormat:@"%@/myScreen_iPhone.png",cachesDirectory];
}
UIImage *image = [self
screenshot];
if (UI_USER_INTERFACE_IDIOM()==UIUserInterfaceIdiomPad)
{
image = [selfrotateUIImage:image
angle:270.0];
}
//UIImagePNGRepresentation转换PNG格式的图片为二进制，如果图片的格式为JPEG则返回nil；
//UIImageJPEGRepresentation转换JPG格式的图片为二进制，如果图片的格式为JPEG则返回nil；
NSData *myData = [NSDatadataWithData:UIImagePNGRepresentation(image)
]; //writeToFile
if (myData!=nil) {
[myData
writeToFile:imgFilePath atomically:YES];
}
}
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory,NSUserDomainMask,YES);
NSString *cachesDirectory = [paths objectAtIndex:0];
NSString*imgFilePath =nil;
if (UI_USER_INTERFACE_IDIOM()==UIUserInterfaceIdiomPad) {
imgFilePath = [[NSString alloc] initWithFormat:@"%@/myScreen_iPad.png",cachesDirectory];
}
else {
imgFilePath = [[NSString alloc] initWithFormat:@"%@/myScreen_iPhone.png",cachesDirectory];
}
if (imgFilePath) {
UIImage *image = [UIImage imageWithContentsOfFile:imgFilePath];
[imageview setImage:image];
}
-(UIImage*)rotateUIImage:(UIImage*) src angle:(float) angleDegrees {
UIView* rotatedViewBox = [[UIView
alloc] initWithFrame:
CGRectMake(0,
0, src.size.width, src.size.height)];
float angleRadians = angleDegrees * ((float)M_PI /180.0f);
//float angleRadians = angleDegrees * ((float)M_PI / 10.0f);
CGAffineTransform t =CGAffineTransformMakeRotation(angleRadians);
rotatedViewBox.transform = t;
CGSize rotatedSize = rotatedViewBox.frame.size;
//[rotatedViewBox release];
UIGraphicsBeginImageContext(rotatedSize);
CGContextRef bitmap =UIGraphicsGetCurrentContext();
CGContextTranslateCTM(bitmap, rotatedSize.width/2, rotatedSize.height/2);
CGContextRotateCTM(bitmap, angleRadians);
CGContextScaleCTM(bitmap, 1.0, -1.0);
CGContextDrawImage(bitmap, CGRectMake(-src.size.width /2, -src.size.height
/2, src.size.width, src.size.height), [srcCGImage]);
UIImage *newImage =UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return newImage;
}