runtime解决iOS11 tableview上移下移问题
给tableview创建一个分类,然后交换初始化方法
#import "UITableView+Ex.h"
@implementation UITableView (Ex)
+(void)load{
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
SEL originalSelector = @selector(initWithFrame:style:);
SEL swizzledSelector = @selector(mr_tableView_initWithFrame:style:);
Method originalMethod = class_getInstanceMethod([self class], originalSelector);
Method swizzledMethod = class_getInstanceMethod([self class], swizzledSelector);
BOOL didAddMethod = class_addMethod([self class], swizzledSelector,method_getImplementation(swizzledMethod) , method_getTypeEncoding(swizzledMethod));
if (didAddMethod)
{
class_replaceMethod([self class], swizzledSelector, method_getImplementation(originalMethod), method_getTypeEncoding(originalMethod));
}
else
{
method_exchangeImplementations(originalMethod, swizzledMethod);
}
});
}
-(instancetype)mr_tableView_initWithFrame:(CGRect)frame style:(UITableViewStyle)style{
UITableView *tableview = [self mr_tableView_initWithFrame:frame style:style];
if (tableview) {
if (@available(iOS 11.0, *)) {
tableview.contentInsetAdjustmentBehavior = UIScrollViewContentInsetAdjustmentNever;
}
}
return tableview;
}
@end
