1、利用runtime方法交換機制 適配iOS11--contentInsetAdjustmentBehavior

#import "UIScrollView+PYExtension.h"

#import

@implementation UIScrollView (PYExtension)

+ (void)load {

Method systemMethod = class_getInstanceMethod(self, @selector(initWithFrame:));

Method customMethod = class_getInstanceMethod(self, @selector(m_initWithFrame:));

method_exchangeImplementations(systemMethod, customMethod);

}

- (instancetype)m_initWithFrame:(CGRect)frame {

UIScrollView *scrollV = [self m_initWithFrame:frame];

if (@available(iOS 11.0, *)) {

scrollV.contentInsetAdjustmentBehavior = UIScrollViewContentInsetAdjustmentNever;

}

return scrollV;

}

@end

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