方向控制功能

Ifish/ZLRocker/UIView+Sizes.h

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+/*
+ * RNSwipeViewController
+ *
+ * Created by Ryan Nystrom on 10/2/12.
+ * Copyright (c) 2012 Ryan Nystrom. All rights reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+
+#import <UIKit/UIView.h>
+
+/** Helps clean up code for changing UIView frames.
+ 
+ Instead of creating a CGRect struct, changing properties and reassigning. For example, moving a UIView newX points to the left:
+ 
+ CGRect frame = view.frame;
+ frame.origin x = (CGFloat)newX + view.frame.size.width;
+ view.frame = frame;
+ 
+ This can be cleaned up to:
+ 
+ view.left += newX;
+ 
+ Properties bottom and right also take into account the width of the UIView.
+ */
+@interface UIView (Sizes)
+
+///---------------------------------------------------------------------------------------
+/// @name Edges
+///---------------------------------------------------------------------------------------
+
+/** Get the left point of a view. */
+@property (nonatomic) CGFloat left;
+
+/** Get the top point of a view. */
+@property (nonatomic) CGFloat top;
+
+/** Get the right point of a view. */
+@property (nonatomic) CGFloat right;
+
+/** Get the bottom point of a view. */
+@property (nonatomic) CGFloat bottom;
+
+///---------------------------------------------------------------------------------------
+/// @name Dimensions
+///---------------------------------------------------------------------------------------
+
+/** Get the width of a view. */
+@property (nonatomic) CGFloat width;
+
+/** Get the height of a view. */
+@property (nonatomic) CGFloat height;
+
+///---------------------------------------------------------------------------------------
+/// @name Quick Access
+///---------------------------------------------------------------------------------------
+
+/** Get the origin of a view. */
+@property (nonatomic) CGPoint origin;
+
+/** Get the size of a view. */
+@property (nonatomic) CGSize size;
+
+///---------------------------------------------------------------------------------------
+/// @name Center
+///---------------------------------------------------------------------------------------
+
+/** Get the center.x of a view. */
+@property (nonatomic) CGFloat centerX;
+
+/** Get the center.y of a view. */
+@property (nonatomic) CGFloat centerY;
+
+@end