方法一：設(shè)置BarButtonItem的文本樣式為透明顏色，代碼如下：
[[UIBarButtonItem appearance] setTitleTextAttributes:@{NSForegroundColorAttributeName: [UIColor clearColor]} forState:UIControlStateNormal]; [[UIBarButtonItem appearance] setTitleTextAttributes:@{NSForegroundColorAttributeName: [UIColor clearColor]} forState:UIControlStateHighlighted]; 此外這種方法會(huì)導(dǎo)致title不能居中，被偏移很多，如下所示（雖然不被顯示，也占了導(dǎo)航欄左邊很大一部分位置）
方法二：給UIViewController添加類別，然后在load方法里面用Method Swzilling方法替換 交換ViewDidAppear，部分代碼如下
+(void)load { swizzleMethod([self class], @selector(viewDidAppear:), @selector(ac_viewDidAppear));}- (void)ac_viewDidAppear{ self.navigationItem.backBarButtonItem = [[UIBarButtonItem alloc] initWithTitle:@"" style:UIBarButtonItemStylePlain target:self action:nil]; [self ac_viewDidAppear];}void swizzleMethod(Class class, SEL originalSelector, SEL swizzledSelector){ // the method might not exist in the class, but in its superclass Method originalMethod = class_getInstanceMethod(class, originalSelector); Method swizzledMethod = class_getInstanceMethod(class, swizzledSelector); // class_addMethod will fail if original method already exists BOOL didAddMethod = class_addMethod(class, originalSelector, method_getImplementation(swizzledMethod), method_getTypeEncoding(swizzledMethod)); // the method doesn't exist and we just added one if (didAddMethod) { class_replaceMethod(class, swizzledSelector, method_getImplementation(originalMethod), method_getTypeEncoding(originalMethod)); } else { method_exchangeImplementations(originalMethod, swizzledMethod); }}注意事項(xiàng)：
要給整個(gè)backButtonItem賦值才可以，👇這種方法不行，因?yàn)閎ackBarButtonItem默認(rèn)為空，給nil方法消息，默認(rèn)聲明都不執(zhí)行（參考官網(wǎng)）
self.navigationItem.backBarButtonItem.title = @" ";
leftBarButtonItem 與backBarButtonItem 的顯示關(guān)系：
有l(wèi)eftBarButtonItem則優(yōu)先顯示當(dāng)前VC的leftBarButtonItem，無(wú)則顯示上個(gè)VC的backBarButtonItem，再無(wú)則顯示上個(gè)VC的title（參考官網(wǎng) 還是官網(wǎng)解釋的清楚）
總結(jié)
以上所述是小編給大家介紹的iOS 11 使用兩種方法替換(Method Swizzling)去掉導(dǎo)航欄返回按鈕的文字，希望對(duì)大家有所幫助，如果大家有任何疑問(wèn)請(qǐng)給我留言，小編會(huì)及時(shí)回復(fù)大家的。在此也非常感謝大家對(duì)武林網(wǎng)網(wǎng)站的支持！
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