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Hotfix for frame observing on iOS 8 #82

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Hotfix for frame observing on iOS 8 #82

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15 changes: 11 additions & 4 deletions DAKeyboardControl/DAKeyboardControl.m
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Original file line number Diff line number Diff line change
Expand Up @@ -9,6 +9,9 @@
#import "DAKeyboardControl.h"
#import <objc/runtime.h>

#ifndef SYSTEM_VERSION_LESS_THAN
#define SYSTEM_VERSION_LESS_THAN(v) ([[[UIDevice currentDevice] systemVersion] compare:v options:NSNumericSearch] == NSOrderedAscending)
#endif

static inline UIViewAnimationOptions AnimationOptionsForCurve(UIViewAnimationCurve curve)
{
Expand All @@ -25,6 +28,8 @@ static inline UIViewAnimationOptions AnimationOptionsForCurve(UIViewAnimationCur
static char UIViewIsPanning;
static char UIViewKeyboardOpened;

static NSString *UIViewKeyboardObservingKey;

@interface UIView (DAKeyboardControl_Internal) <UIGestureRecognizerDelegate>

@property (nonatomic) DAKeyboardDidMoveBlock frameBasedKeyboardDidMoveBlock;
Expand Down Expand Up @@ -57,6 +62,8 @@ + (void)load
class_getMethodImplementation(self, swizzledSelector),
method_getTypeEncoding(swizzledMethod));
method_exchangeImplementations(originalMethod, swizzledMethod);

UIViewKeyboardObservingKey = SYSTEM_VERSION_LESS_THAN(@"8") ? @"frame" : @"center";
}

#pragma mark - Public Methods
Expand Down Expand Up @@ -372,9 +379,9 @@ - (void)observeValueForKeyPath:(NSString *)keyPath
change:(__unused NSDictionary *)change
context:(__unused void *)context
{
if([keyPath isEqualToString:@"frame"] && object == self.keyboardActiveView)
if([keyPath isEqualToString:UIViewKeyboardObservingKey] && object == self.keyboardActiveView)
{
CGRect keyboardEndFrameWindow = [[object valueForKeyPath:keyPath] CGRectValue];
CGRect keyboardEndFrameWindow = self.keyboardActiveView.frame;
CGRect keyboardEndFrameView = [self convertRect:keyboardEndFrameWindow fromView:self.keyboardActiveView.window];

if (CGRectEqualToRect(keyboardEndFrameView, self.previousKeyboardRect)) return;
Expand Down Expand Up @@ -688,11 +695,11 @@ - (void)setKeyboardActiveView:(UIView *)keyboardActiveView
{
[self willChangeValueForKey:@"keyboardActiveView"];
[self.keyboardActiveView removeObserver:self
forKeyPath:@"frame"];
forKeyPath:UIViewKeyboardObservingKey];
if (keyboardActiveView)
{
[keyboardActiveView addObserver:self
forKeyPath:@"frame"
forKeyPath:UIViewKeyboardObservingKey
options:0
context:NULL];
}
Expand Down