Declared in UIView+DTFoundation.h

Overview

DTFoundation enhancements for UIView

Tasks

Getting Snapshot Images

Rounded Corners

Shadows

Instance Methods

addShadowWithColor:alpha:radius:offset:

Adds a layer-based shadow to the receiver.

- (void)addShadowWithColor:(UIColor *)color alpha:(CGFloat)alpha radius:(CGFloat)radius offset:(CGSize)offset

Parameters

color

The shadow color. Can be nil for default black.

alpha

The alpha value of the shadow.

radius

The amount that the shadow is blurred.

offset

The offset of the shadow

Discussion

The advantage of using this method is that you do not need to import the QuartzCore headers just for adding the shadow. Layer-based shadows are properly combined for views that are on the same superview. This does not add a shadow path, you should call updateShadowPathToBounds whenever the receiver’s bounds change and also after setting the initial frame. @warn Disables clipping to bounds because this would also clip off the shadow.

See Also

Declared In

UIView+DTFoundation.h

setRoundedCornersWithRadius:width:color:

Sets the corner attributes of the receiver’s layer.

- (void)setRoundedCornersWithRadius:(CGFloat)radius width:(CGFloat)width color:(UIColor *)color

Parameters

radius

The corner radius.

width

The width of the border line.

color

The color to be used for the border line. Can be nil to leave it unchanged.

Discussion

The advantage of using this method is that you do not need to import the QuartzCore headers just for setting the corners.

Declared In

UIView+DTFoundation.h

snapshotImage

Creates a snapshot of the receiver.

- (UIImage *)snapshotImage

Return Value

Returns a bitmap image with the same contents and dimensions as the receiver.

Declared In

UIView+DTFoundation.h

updateShadowPathToBounds:withDuration:

sets the shadow path to fit the receiver’s bounds.

- (void)updateShadowPathToBounds:(CGRect)bounds withDuration:(NSTimeInterval)duration

Parameters

bounds

The new bounds of the shadow path

duration

The animation duration. Specify a duration of 0 to not do an animation

Discussion

This should be called whenever the receiver’s bounds change, or else the shadow detaches. @warn Since this a CALayer property it needs to be explicitly animated, for example in the willRotate … method of a UIViewController.

Declared In

UIView+DTFoundation.h