Add nullability annotations to PFImageView, PFTextField.

Author: nlutsenko

ParseUI/Classes/Views/PFImageView.h

@@ -21,6 +21,8 @@
 
 #import <UIKit/UIKit.h>
 
+#import <ParseUI/ParseUIConstants.h>
+
 @class BFTask;
 @class PFFile;
 
@@ -34,7 +36,7 @@
 
  @warning Note that the download does not start until <loadInBackground:> is called.
  */
-@property (nonatomic, strong) PFFile *file;
+@property (nonatomic, strong, nullable) PFFile *file;
 
 /*!
  @abstract Initiate downloading of the remote image.
@@ -43,7 +45,7 @@
 
  @returns The task, that encapsulates the work being done.
  */
-- (BFTask *)loadInBackground;
+- (nonnull BFTask *)loadInBackground;
 
 /*!
  @abstract Initiate downloading of the remote image.
@@ -52,7 +54,7 @@
 
  @param completion the completion block.
  */
-- (void)loadInBackground:(void (^)(UIImage *image, NSError *error))completion;
+- (void)loadInBackground:(nullable void (^)(__nullable UIImage *image, __nullable NSError *error))completion;
 
 /*!
  @abstract Initiate downloading of the remote image.
@@ -63,6 +65,7 @@
  @param progressBlock called with the download progress as the image is being downloaded. 
  Will be called with a value of 100 before the completion block is called.
  */
-- (void)loadInBackground:(void (^)(UIImage *, NSError *))completion progressBlock:(void (^)(int percentDone))progressBlock;
+- (void)loadInBackground:(nullable void (^)(__nullable UIImage *image, __nullable NSError *error))completion
+           progressBlock:(nullable void (^)(int percentDone))progressBlock;
 
 @end

ParseUI/Classes/Views/PFTextField.h

@@ -21,6 +21,8 @@
 
 #import <UIKit/UIKit.h>
 
+#import <ParseUI/ParseUIConstants.h>
+
 /*!
  `PFTextFieldSeparatorStyle` bitmask specifies the style of the separators,
  that should be used for a given `PFTextField`.
@@ -56,7 +58,7 @@ typedef NS_OPTIONS(uint8_t, PFTextFieldSeparatorStyle){
 
  @discussion Default: `227,227,227,1.0`.
  */
-@property (nonatomic, strong) UIColor *separatorColor UI_APPEARANCE_SELECTOR;
+@property (nonatomic, strong, nullable) UIColor *separatorColor UI_APPEARANCE_SELECTOR;
 
 /*!
  This method is a convenience initializer that sets both `frame` and `separatorStyle` for an instance of `PFTextField.`
@@ -66,6 +68,6 @@ typedef NS_OPTIONS(uint8_t, PFTextFieldSeparatorStyle){
 
  @return An initialized instance of `PFTextField` or `nil` if it couldn't be created.
  */
-- (instancetype)initWithFrame:(CGRect)frame separatorStyle:(PFTextFieldSeparatorStyle)separatorStyle;
+- (nonnull instancetype)initWithFrame:(CGRect)frame separatorStyle:(PFTextFieldSeparatorStyle)separatorStyle;
 
 @end