摘要： View Code 1 / Create paths to output images 2 NSString *pngPath = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents/Test.png"]; 3 NSString *jpgPath = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents/Test.jpg"]; 4 5 // Write a UIImage to JPEG with minimum 阅读全文

摘要： View Code 1 . NSData 与 NSString 2 3 NSData－> NSString 4 5 NSString *aString = [[NSString alloc] initWithData:adataencoding:NSUTF8StringEncoding]; 6 7 8 9 NSString－>NSData 10 11 NSString *aString = @"1234abcd"; 12 13 NSData *aData = [aString dataUsingEncoding: NSUTF8StringEncoding];.. 阅读全文

摘要： UIImage转换成NSData后需要先将NSData转成BASE64View Code 1 //To convert an image to string you need a method to convert NSData to a base64Encoded string and back (lots of examples here). The easiest ones to use are categories on NSData so you can do something like this: 2 3 UIImage* pic =[UIImage imageNamed:@.. 阅读全文