如何將一系列類似的行轉換爲for循環？

Question

我正在爲iPhone編程一個應用程序。我還沒有很好的循環。我如何將這段代碼縮短爲for循環？

if(CGRectContainsRect([space1 frame], [box frame])){ 

    space1.image = [UIImage imageNamed:@"box.png"]; 
} 
else if(CGRectContainsRect([space2 frame], [box frame])){ 

    space2.image = [UIImage imageNamed:@"box.png"]; 
} 
else if(CGRectContainsRect([space3 frame], [box frame])){ 

    space3.image = [UIImage imageNamed:@"box.png"]; 
} 
else if(CGRectContainsRect([space4 frame], [box frame])){ 

    space4.image = [UIImage imageNamed:@"box.png"]; 
} 
else if(CGRectContainsRect([space5 frame], [box frame])){ 

    space5.image = [UIImage imageNamed:@"box.png"]; 
} 

Answer 1

NSArray * spaces = [NSArray arrayWithObjects:space1, space2, space3, space4, space5, nil]; 
for (Space * space in spaces) { 
    if (CGRectContainsRect([space frame], [box frame])) { 
    space.image = [UIImage imageNamed:@"box.png"]; 
    } 
}