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单军华

2018-07-11 acdf41fa3b32b628d9d7bba1f975060567dad3d7

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//
//  UIScrollView+YYAdd.m
//  YYCategories <https://github.com/ibireme/YYCategories>
//
//  Created by ibireme on 13/4/5.
//  Copyright (c) 2015 ibireme.
//
//  This source code is licensed under the MIT-style license found in the
//  LICENSE file in the root directory of this source tree.
//
 
#import "UIScrollView+YYAdd.h"
#import "YYCategoriesMacro.h"
 
YYSYNTH_DUMMY_CLASS(UIScrollView_YYAdd)
 
 
@implementation UIScrollView (YYAdd)
 
- (void)scrollToTop {
    [self scrollToTopAnimated:YES];
}
 
- (void)scrollToBottom {
    [self scrollToBottomAnimated:YES];
}
 
- (void)scrollToLeft {
    [self scrollToLeftAnimated:YES];
}
 
- (void)scrollToRight {
    [self scrollToRightAnimated:YES];
}
 
- (void)scrollToTopAnimated:(BOOL)animated {
    CGPoint off = self.contentOffset;
    off.y = 0 - self.contentInset.top;
    [self setContentOffset:off animated:animated];
}
 
- (void)scrollToBottomAnimated:(BOOL)animated {
    CGPoint off = self.contentOffset;
    off.y = self.contentSize.height - self.bounds.size.height + self.contentInset.bottom;
    [self setContentOffset:off animated:animated];
}
 
- (void)scrollToLeftAnimated:(BOOL)animated {
    CGPoint off = self.contentOffset;
    off.x = 0 - self.contentInset.left;
    [self setContentOffset:off animated:animated];
}
 
- (void)scrollToRightAnimated:(BOOL)animated {
    CGPoint off = self.contentOffset;
    off.x = self.contentSize.width - self.bounds.size.width + self.contentInset.right;
    [self setContentOffset:off animated:animated];
}
 
@end