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Home/ Questions/Q 5938325
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Editorial Team
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Editorial Team
Asked: May 22, 20262026-05-22T15:40:11+00:00 2026-05-22T15:40:11+00:00

UIButton *btn=[[UIButton alloc] init]; and UIButton *btn=[UIButton buttonWithType:UIButtonTypeRoundedRect]; What is the difference between these

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UIButton *btn=[[UIButton alloc] init]; 

and

UIButton *btn=[UIButton buttonWithType:UIButtonTypeRoundedRect];

What is the difference between these two declarations or are both the same?

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  1. Editorial Team
    Editorial Team
    2026-05-22T15:40:12+00:00Added an answer on May 22, 2026 at 3:40 pm
    [UIButton buttonWithType:...]
    

    creates an autoreleased object (which still needs memory).

    [[UIButton alloc]init] 
    

    creates an object which is not going to be autoreleased. you have to release by yourself!

    have a further look at this question.

    And more about memory management.

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