iphone - NSMutableArray 问题

Question

谁能解释一下为什么这段代码会破坏我的应用程序:

NSMutableArray *myArray = [[NSMutableArray alloc] initWithObjects:@"recipeA", @"recipeA1", @"recipeA2", @"recipeA3",@"recipeA4",@"recipeA5",@"recipeA6",@"recipeA7",nil];

//these both break the app with invalid pointer type warnings
NSLog("What is 0: %@", [myArray objectAtIndex:0]);
NSLog("What is the count: %i", [myArray count]);

Answer 1

您忘记了 NSLog 字符串前面的@:

NSLog(@"What is 0: %@", [myArray objectAtIndex:0]);
NSLog(@"What is the count: %i", [myArray count]);