如何将一系列类似的行转换为for循环？

Question

我正在为iPhone编程一个应用程序。我还没有很好的循环。我如何将这段代码缩短为for循环？

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"]; 
    } 
}