Use of AutoLayout

1 Interface settings

1>., red Error

The frame cannot be set manually using AutoLayout. the principle of AutoLayout is also to set the frame, but the relative position is fastidious. If one of its x,y,height,width is not set, it will be an error. The x, y settings can be set for specific data, can be aligned relative to left and right, or can be modulated relative to the horizontal vertical average. Height,width can set the specific data, can also be relatively high width, relative size.

2>, yellow error

This is Xcode's reminder that the layout of the Xib or SB does not match the actual, as long as we update the frame to

2 Handwriting Settings

1> first to enter the Autoresizing function

View.translatesautoresizingmaskintoconstraints = NO;

2> Don't set frame again

3> method

[View addconstraint:<# (Nslayoutconstraint *) #>]; [View addconstraints:<# (Nsarray *) #>];

Use of AutoLayout