#import "UIViewController+Tracking.h"
#import <objc/runtime.h>
@implementation UIViewController (Tracking)
+ (void)load {
NSString *className = NSStringFromClass(self.class);
NSLog(@"className_______%@",className);
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
Class class = [self class];
SEL originalSelector = @selector(viewWillAppear:);
SEL swizzledSelector = @selector(sl_viewWillAppear:);
Method originalMethod = class_getInstanceMethod(class, originalSelector);
Method swizzledMethod = class_getInstanceMethod(class, swizzledSelector);
BOOL didAddMethod = class_addMethod(class, originalSelector, method_getImplementation(swizzledMethod), method_getTypeEncoding(swizzledMethod));
if (didAddMethod) {
class_replaceMethod(class,
swizzledSelector,
method_getImplementation(originalMethod),
method_getTypeEncoding(originalMethod));
} else {
method_exchangeImplementations(originalMethod, swizzledMethod);
}
});
}
- (void)sl_viewWillAppear:(BOOL)animated{
NSLog(@"sl_viewWillAppear_______%@",self);
[self sl_viewWillAppear:animated];
}
swizzle
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