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
#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
转载于:https://www.cnblogs.com/huangzs/p/11474784.html
