ios - Use result of an if statement as a variable -

i'm wondering if there's way of using returned value of method, checked if statement, variable if not nil.

i hope code example below helps explain i'm after.

let's have method returns uiimageview, -(uiimageview *)imageviewexistsforid:(nsstring *)viewid. in method somewhere else, want check if imageview returns value, , conditional, use if-statement, such:

if ([self imageviewexistsforid:<viewid>]) {  // use returned imageview here  } else {  // 'nil' returned, no need use result  } 

normally, declare placeholder variable before if-statement, such as:

uiimageview *returnedimageview = [self imageviewexistsforid:<viewid>];  if (returnedimageview) { ...etc 

i'm curious know if there way of passing result method, when first checked if-statement, without having store result in variable first, more akin to:

if ([self imageviewexistsforid:<viewid>]) {      uiimageview *imageview = if-statement-result      // ??? (i.e. don't call method again [self imageviewexistsforid:<viewid>])  } 

disclaimer: asking purely intellectually curious angle, not 'issue' stopping me achieving in code. i'm keen learn more objective-c don't consider myself well-read enough in yet. can let me know particular point - apologies if i'm being incomprehensible!

no, there not way use result of if-condition. have declare placeholder variable.

it possible, , under circumstances permissible, initialize placeholder inside if statement

uiimageview *returnedimageview;  if ((returnedimageview = [self imageviewexistsforid:<viewid>])) { 

note parentheses; using = instead of == common mistake compiler may issue warning without wrapping assignment in parentheses.