Light's Blog

The best or nothing.

iOS知识小集-170313

| Comments

Masonry

需要先添加到父视图，再设置约束。
block中无需使用weakself。
添加约束：makeConstrains。
更新约束：updateConstrains，与之相关的布局自动调整。
重设约束：remakeConstrains，删除之前的约束重新添加。

[self.view updateConstraints:^(MASConstraintMaker *make){
  //  updateConstraints
}];
[self.view updateConstraints];
[self.view setNeedsLayout];
[UIView animateWithDuration:3 animations:^{
  [self.view layoutIfNeeded];
}];

Autolayout

setNeedsLayout：使当前布局失效，并在下一个更新循环中触发布局更新，遍历view的结构。
layoutIfNeeded：强制立即更新布局，可以实现动画效果。
scrollview自动布局：添加tmpview，在tmpview上添加view，最后约束tmpview和contentsize。

退出viewcontroller事件监听

IQActionSheetPickerView

1
2
3
4
5

IQActionSheetPickerView *picker = [IQActionSheetPickerView actionSheetWithTitle:@"Age" delegate:self];
NSArray *dataSource = @[@"10",@"20",@"30",@"40",@"50",@"60"];
[picker setTitlesForComponents:@[dataSource]];
[picker setSelectedTitles:@[@"20"]];
[picker show];

代理回调

1
2

- (void)actionSheetPickerView:(IQActionSheetPickerView *)pickerView didSelectTitles:(NSArray *)titles {
}

原始地址： http://sxgfxm.github.io/blog/2017/03/20/ioszhi-shi-xiao-ji-170313/
written by Light  posted at http://sxgfxm.github.io

Comments