iOS12 运行不了上来就崩溃，数组越界，[[self.navigationBar subviews] objectAtIndex:0]; 为什么self.navigationBar subviews 一个控件都没有，做了什么操作么？

StephenQin commented 5 years ago

gleeeli commented 5 years ago

不维护了吗哥们

gleeeli commented 5 years ago

// 设置导航栏背景透明度

(void)setNeedsNavigationBackground:(CGFloat)alpha { // 导航栏背景透明度设置 if ([[self.navigationBar subviews] count] == 0) { return; } UIView barBackgroundView = [[self.navigationBar subviews] objectAtIndex:0];// _UIBarBackground UIImageView backgroundImageView = [[barBackgroundView subviews] objectAtIndex:0];// UIImageView if (self.navigationBar.isTranslucent) { if (backgroundImageView != nil && backgroundImageView.image != nil) { barBackgroundView.alpha = alpha; } else { UIView *backgroundEffectView = [[barBackgroundView subviews] objectAtIndex:1];// UIVisualEffectView if (backgroundEffectView != nil) { backgroundEffectView.alpha = alpha; } } } else { barBackgroundView.alpha = alpha; }

// 对导航栏下面那条线做处理 self.navigationBar.clipsToBounds = alpha == 0.0; }

防止闪退

LiShengP commented 4 years ago

这样用在不同的系统上很容易崩溃啊

Cloudox / SmoothNavDemo