思路
1.建个UIViewController的分类
2.hook方法viewDidLoad（Aspects是三方库 可以不用）
3.看下面蓝色部分代码
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#import “UIViewController+TJSwizzling.h” #import <Aspects.h> @implementation UIViewController (TJSwizzling) + (void)load{ static dispatch_once_t onceToken; dispatch_once(&onceToken, ^{ [self aspect_hookSelector:@selector(viewDidLoad) withOptions:AspectPositionAfter usingBlock:^(id<AspectInfo> aspectInfo) { [[aspectInfo instance] swizzling_viewDidLoad]; } error:NULL]; }); } #pragma mark – ViewDidLoad – (void)swizzling_viewDidLoad{ //全局设置页面为白色 // UIInputWindowController 会覆盖每一个控制器，避免为其设置颜色 Class class = NSClassFromString(@”UIInputWindowController”); if (self.class != class) { self.view.backgroundColor = [UIColor whiteColor]; } //全局设置返回按钮样式 if (self.navigationController && [self isEqual:self.navigationController.topViewController]) { UIImage *buttonNormal = [[UIImage imageNamed:@”VideoBar_back”] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal]; [self.navigationController.navigationBar setBackIndicatorImage:buttonNormal]; [self.navigationController.navigationBar setBackIndicatorTransitionMaskImage:buttonNormal]; UIBarButtonItem *backItem = [[UIBarButtonItem alloc] initWithTitle:@”” style:UIBarButtonItemStylePlain target:nil action:nil]; self.navigationItem.backBarButtonItem = backItem; } } @end |
