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[操作系统]Masonry应用【美图秀秀首页界面自动布局】


  Masonry在此实现时候,并没有比NSLayoutConstraint简单,相反我觉得还不如NSLayoutConstraint。

  [self.topView mas_makeConstraints:^(MASConstraintMaker *make) {    make.top.equalTo(self.view.mas_top);    make.right.equalTo(self.view.mas_right).with.offset(-6);    make.width.equalTo(@51);    make.height.equalTo(@61);  }];    [btnSetting mas_makeConstraints:^(MASConstraintMaker *make) {    make.bottom.equalTo(self.view.mas_bottom).with.offset(-8);    make.right.equalTo(self.view.mas_right).with.offset(-6);    make.width.equalTo(@39);    make.height.equalTo(btnSetting.mas_width);  }];    [self.scrolleView mas_makeConstraints:^(MASConstraintMaker *make) {    make.top.equalTo(image.mas_bottom);    make.left.equalTo(self.view.mas_left);    make.width.equalTo(@(WIDTH-0));    make.height.equalTo(@(HEIGHT - 47 - 61));  }];

下面是使用NSLayoutConstraint的代码实现

                [NSLayoutConstraint constraintWithItem:self.topView attribute:NSLayoutAttributeTop relatedBy:NSLayoutRelationEqual toItem:self.view attribute:NSLayoutAttributeTop multiplier:1.0 constant:0],                [NSLayoutConstraint constraintWithItem:self.topView attribute:NSLayoutAttributeRight relatedBy:NSLayoutRelationEqual toItem:self.view attribute:NSLayoutAttributeRight multiplier:1.0 constant:-6],                [NSLayoutConstraint constraintWithItem:self.topView attribute:NSLayoutAttributeWidth relatedBy:NSLayoutRelationEqual toItem:nil attribute:NSLayoutAttributeNotAnAttribute multiplier:1.0 constant:51],                [NSLayoutConstraint constraintWithItem:self.topView attribute:NSLayoutAttributeHeight relatedBy:NSLayoutRelationEqual toItem:nil attribute:NSLayoutAttributeNotAnAttribute multiplier:1.0 constant:61],                                [NSLayoutConstraint constraintWithItem:btnSetting attribute:NSLayoutAttributeBottom relatedBy:NSLayoutRelationEqual toItem:self.view attribute:NSLayoutAttributeBottom multiplier:1.0 constant:-8],                [NSLayoutConstraint constraintWithItem:btnSetting attribute:NSLayoutAttributeRight relatedBy:NSLayoutRelationEqual toItem:self.view attribute:NSLayoutAttributeRight multiplier:1.0 constant:-6],                [NSLayoutConstraint constraintWithItem:btnSetting attribute:NSLayoutAttributeWidth relatedBy:NSLayoutRelationEqual toItem:nil attribute:NSLayoutAttributeNotAnAttribute multiplier:1.0 constant:39],                [NSLayoutConstraint constraintWithItem:btnSetting attribute:NSLayoutAttributeHeight relatedBy:NSLayoutRelationEqual toItem:btnSetting attribute:NSLayoutAttributeWidth multiplier:1.0 constant:0],                                [NSLayoutConstraint constraintWithItem:self.scrolleView attribute:NSLayoutAttributeTop relatedBy:NSLayoutRelationEqual toItem:image attribute:NSLayoutAttributeBottom multiplier:1.0 constant:0],                [NSLayoutConstraint constraintWithItem:self.scrolleView attribute:NSLayoutAttributeLeft relatedBy:NSLayoutRelationEqual toItem:self.view attribute:NSLayoutAttributeLeft multiplier:1.0 constant:0],                [NSLayoutConstraint constraintWithItem:self.scrolleView attribute:NSLayoutAttributeWidth relatedBy:NSLayoutRelationEqual toItem:nil attribute:NSLayoutAttributeNotAnAttribute multiplier:1.0 constant:WIDTH],                [NSLayoutConstraint constraintWithItem:self.scrolleView attribute:NSLayoutAttributeHeight relatedBy:NSLayoutRelationEqual toItem:nil attribute:NSLayoutAttributeNotAnAttribute multiplier:1.0 constant:HEIGHT - 47 - 61]

至于使用哪种布局库,自行斟酌。。。。