ios开发之 -- NSData 和 NSString , UIImage 等之间的互转

     //NSData转换为UIImage
     NSData *imageData = [NSData dataWithContentsOfFile: imagePath];
     UIImage *image = [UIImage imageWithData: imageData];  
 
     //UIImage转换为NSData
     NSData *imageData = UIImagePNGRepresentation(aimae);  

. 字符串转Data
 
NSString * str =@"str"; 
 
NSData *data =[str dataUsingEncoding:NSUTF8StringEncoding];
 
.NSData 转NSString
 
NSString * str  =[[NSString alloc] initWithData:data encoding:NSUTF8StringEncoding];
 
.data 转char
 
NSData *data; 
 
char * haha=[data bytes]; 
 
. char 转data 
 
byte * byteData = malloc(sizeof(byte)*); 
 
NSData *content=[NSData dataWithBytes:byteData length:];

纯属记录!