Runtime && Method Swizzling 替换ViewC生命周期方法

#import "UIViewController+Swizzling.h"
#import "NSObject+Swizzling.h"
@implementation UIViewController (Swizzling)

+ (void)load {
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
[self methodSwizzlingWithOriginalSelector:@selector(viewWillDisappear:) bySwizzledSelector:@selector(sure_viewWillDisappear:)];
});
}

- (void)sure_viewWillDisappear:(BOOL)animated {
[self sure_viewWillDisappear:animated];
[SVProgressHUD dismiss];
}