Relative layout log

In the relative layout process, you will encounter a variety of layout problems, organized as follows:

1. Overall centering-*

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In this effect, because all sub-views are not centered, they cannot be centered across the center toward the sides.

The idea is to press the ImageView from left to right by 1-7 numbers, and to the left of each imageview to the right of the previous imageview.

650) this.width=650; "src=" Http://s5.51cto.com/wyfs02/M00/7D/50/wKiom1blhbbTdzptAAXTyRaUtOY733.png "style=" float: none; "title=" 2.png "alt=" Wkiom1blhbbtdzptaaxtyrautoy733.png "/>

Then nest a uiview on all ImageView, #1的左边对齐父View的左边, the right side of the parent view aligns to the right of the last ImageView (#7). Then align the CenterX and centery of the parent view to the centerx/centery of the entire view, and the bottom of the parent view aligns the imageview of the bottom two bottom either.

2. Automatic adjustment according to text length in Uilabel-* *

Todo

3. Uitextview height with brother view how much adjustment-* * *

Todo

4. AutoLayout of Swift via Snapkit components-*

Snapkit is a third-party AutoLayout library based on the Swift language, which simplifies the amount of code to set constraints. However, due to its defined constraint object changed from Nslayoutconstraint to constraint, the way of updating the constraint has changed correspondingly, such as the constant method of the commonly used updating related constraints, by Nslayoutconstraint to define constraints, this is usually the case:

Sharecirclebottomconstraint = Nslayoutconstraint (Item:sharecirclesview, attribute:. Bottom, Relatedby:. Equal, Toitem:view, attribute:. Bottom, multiplier:1.0, constant:0) sharecirclebottomconstraint.active = true;

Then call sharecirclebottomconstraint.constant= to update

The constraint is defined by the constraint in Snapkit, which is simplified to:

650) this.width=650; "src=" Http://s5.51cto.com/wyfs02/M00/7D/50/wKiom1bliHbwe6p8AACTS4QhVB8816.png "title=" 001yayrmgy7056wekgeee&690.png "alt=" Wkiom1blihbwe6p8aacts4qhvb8816.png "/>

and then call

Sharecirclebottomcontraint.updateoffset (0)

To update

This article is from "Leo's Technical Diary" blog, please be sure to keep this source http://shskey.blog.51cto.com/8310114/1750718

Relative layout log