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hunche
3,339 PointsI do a custom Class ,but I can not Declaring Custom Attributes for Properties to set value into the Class
Custom Class dog.h Only had a property named" kind" @interface dog : NSObject
@property(nonatomic,strong)NSString* kind;
@end
//Declare Custom Attributes named "dg"
import "dog.h"
@interface HungAppDelegate : UIResponder <UIApplicationDelegate>
@property(strong,nonatomic) dog * dg; @end
@implementation HungAppDelegate
-
(BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
self.dg.kind = @"abc"; // is this line Right ???????????
NSLog(@"---%@----",self.dg.kind); return YES; }
@end
result is : -------NULL------
I hope it will show abc , but do not , how can I solve it ??
1 Answer
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kerdeseverin
9,688 PointsYou need to alloc init your Class before you can start using it.
self.dg = [dog alloc]init];
self.dg.kind = @"abc";
NSLog(@"---%@----",self.dg.kind); return YES; // this will print abc