ios 7 Autolayout bug

ios 7 Autolayout bug

錯誤類型：NSInternalInconsistencyException(SIGABRT)
詳情：Auto Layout still required after executing -layoutSubviews. MttFeedsVideoActionBar's implementation of -layoutSubviews needs to call super.

根據提示，在使用autolayout的場景下，actionbar的layoutsubview（）方法裏，須要在[super layoutsubviews（）] 調用以前，先調用autolayout的約束方法，因此就這麼處理：

- (void)layoutSubviews
{
    if([[UIDevice currentDevice].systemVersion floatValue] >= 8.0) {
        [super layoutSubviews];
    }
    //code needs to be excuted
    [self setLayout];
    if([[UIDevice currentDevice].systemVersion floatValue] >= 8.0) {
        [super layoutSubviews];
    }
}