最近感覺好多人還在問如何判斷iOS11系統(tǒng)的問題，以為過了這么多大家都適配好了，其實不然。
為什么要搞一個宏定義呢，因為有些小伙伴Xcode版本還是停留在Xcode8，這樣判斷是iOS11的方法就尷尬了，所以搞個宏。

//-----------------------------------  iOS11適配  ------------------------------------
#define  adjustsScrollViewInsets(scrollView)\
do {\
    _Pragma("clang diagnostic push")\
    _Pragma("clang diagnostic ignored \"-Warc-performSelector-leaks\"")\
    if ([scrollView respondsToSelector:NSSelectorFromString(@"setContentInsetAdjustmentBehavior:")]) {\
        NSMethodSignature *signature = [UIScrollView instanceMethodSignatureForSelector:@selector(setContentInsetAdjustmentBehavior:)];\
        NSInvocation *invocation = [NSInvocation invocationWithMethodSignature:signature];\
        NSInteger argument = 2;\
        invocation.target = scrollView;\
        invocation.selector = @selector(setContentInsetAdjustmentBehavior:);\
        [invocation setArgument:&argument atIndex:2];\
        [invocation retainArguments];\
        [invocation invoke];\
    }\
    _Pragma("clang diagnostic pop")\
} while (0)

在需要使用的地方寫上：

adjustsScrollViewInsets(<#scrollView#>)

即可。