CODEWITHSUNDEEP
iphoneobjective-ciosxcodecocoa-touch
Jaume
Jaume

Reputation: 923

ios boolean var declaration

I declared a function with boolean input var. I get no errors. However, when calling it from another controller, notification appears: "incompatible integer to pointer conversion sending'BOOL' to parameter of type BOOL". What am I doing wrong? Thanks.

- (void)composeBar: (BOOL *)savePars

from other view:

AppDelegate *localFunction = [[UIApplication sharedApplication] delegate];

[localFunction composeBar:YES];

Upvotes: 5

Views: 2807

Answers (2)

Sergey Kalinichenko
Sergey Kalinichenko

Reputation: 726479

This is because you declared the function as taking a pointer to boolean, not a boolean. This is how the declaration should look:

- (void)composeBar: (BOOL)savePars

* accompanies id types (i.e. the ones you define through @interface/@implementation). Regular C types, enums, structs, etc. do not need a * in the declaration, unless you actually want to pass a pointer.

Upvotes: 4

Lily Ballard
Lily Ballard

Reputation: 185661

BOOL* isn't a boolean. It's a pointer to a boolean. Just use

- (void)composeBar:(BOOL)savePars

You're likely confused because all Obj-C objects are declared with the *, but that's because they're actually pointers. However, BOOL is not an object, it's actually just a char which holds 0 or 1. Just as you would use int for an integer instead of int* (or in more idiomatic code, NSInteger), you use BOOL instead of BOOL*.

Upvotes: 9

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