iOS自动布局
一开始用VFL语言都是这样实现自动布局的,一两个控件还好,多几个控件简直不能忍。
_backgroundImageView = [[UIImageView alloc] init]; _backgroundImageView.backgroundColor = [UIColor clearColor]; _backgroundImageView.translatesAutoresizingMaskIntoConstraints = NO; [self addSubview:_backgroundImageView]; NSMutableArray* contraints = [NSMutableArray new]; [contraints addObjectsFromArray:[NSLayoutConstraint constraintsWithVisualFormat:@"H:|-0-[_backgroundImageView]-0-|" options:0 metrics:nil views:NSDictionaryOfVariableBindings(_backgroundImageView)]]; [contraints addObjectsFromArray:[NSLayoutConstraint constraintsWithVisualFormat:@"V:|-0-[_backgroundImageView]-0-|" options:0 metrics:nil views:NSDictionaryOfVariableBindings(_backgroundImageView)]]; [self addConstraints:contraints];
后来发现了Masonry 现在都是这样实现自动布局的:
_scrollView = [[UIScrollView alloc] init]; _scrollView.pagingEnabled = YES; _scrollView.backgroundColor = [UIColor clearColor]; [self addSubview:_scrollView]; [_scrollView makeConstraints:^(MASConstraintMaker *make) { make.left.equalTo(0); make.right.equalTo(0); make.top.equalTo(0); make.bottom.equalTo(0); }];
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