-(bool)checkDevice:(NSString*)name{ NSString* deviceType = [UIDevice currentDevice].model; NSLog(@"deviceType = %@", deviceType);  NSRange range = [deviceType rangeOfString:name]; return range.location != NSNotFound;}

  NSString *  nsStrIphone=@"iPhone";   NSString *  nsStrIpod=@"iPod";   NSString *  nsStrIpad=@"iPad";   bool  bIsiPhone=false;   bool  bIsiPod=false;   bool  bIsiPad=false;   bIsiPhone=[self  checkDevice:nsStrIphone];   bIsiPod=[self checkDevice:nsStrIpod];   bIsiPad=[self checkDevice:nsStrIpad];