标签：int property super nta 返回值 set use else tty
@interface UITextField (Healper)
/**
* 是否支持视图上移
*/
@property (nonatomic, assign) BOOL canMove;
/**
* 点击回收键盘、移动的视图，默认是当前控制器的view
*/
@property (nonatomic, strong) UIView *moveView;
/**
* textfield底部距离键盘顶部的距离
*/
@property (nonatomic, assign) CGFloat heightToKeyboard;
@property (nonatomic, assign, readonly) CGFloat keyboardY;
@property (nonatomic, assign, readonly) CGFloat keyboardHeight;
@property (nonatomic, assign, readonly) CGFloat initialY;
@property (nonatomic, assign, readonly) CGFloat totalHeight;
@property (nonatomic, strong, readonly) UITapGestureRecognizer *tapGesture;
@property (nonatomic, assign, readonly) BOOL hasContentOffset;
@end
//m文件
#import "UITextField+Healper.h"
#import <objc/runtime.h>
static char canMoveKey;
static char moveViewKey;
static char heightToKeyboardKey;
static char initialYKey;
static char tapGestureKey;
static char keyboardYKey;
static char totalHeightKey;
static char keyboardHeightKey;
static char hasContentOffsetKey;
@implementation UITextField (Healper)
@dynamic canMove;
@dynamic moveView;
@dynamic heightToKeyboard;
@dynamic initialY;
@dynamic tapGesture;
@dynamic keyboardY;
@dynamic totalHeight;
@dynamic keyboardHeight;
@dynamic hasContentOffset;
+ (void)load {
static dispatch_once_t onceToken;
dispatch_once(&onceToken, ^{
SEL systemSel = @selector(initWithFrame:);
SEL mySel = @selector(setupInitWithFrame:);
[self exchangeSystemSel:systemSel bySel:mySel];
SEL systemSel2 = @selector(becomeFirstResponder);
SEL mySel2 = @selector(newBecomeFirstResponder);
[self exchangeSystemSel:systemSel2 bySel:mySel2];
SEL systemSel3 = @selector(resignFirstResponder);
SEL mySel3 = @selector(newResignFirstResponder);
[self exchangeSystemSel:systemSel3 bySel:mySel3];
SEL systemSel4 = @selector(initWithCoder:);
SEL mySel4 = @selector(setupInitWithCoder:);
[self exchangeSystemSel:systemSel4 bySel:mySel4];
});
[super load];
}
// 交换方法
+ (void)exchangeSystemSel:(SEL)systemSel bySel:(SEL)mySel {
Method systemMethod = class_getInstanceMethod([self class], systemSel);
Method myMethod = class_getInstanceMethod([self class], mySel);
//首先动态添加方法，实现是被交换的方法，返回值表示添加成功还是失败
BOOL isAdd = class_addMethod(self, systemSel, method_getImplementation(myMethod), method_getTypeEncoding(myMethod));
if (isAdd) {
//如果成功，说明类中不存在这个方法的实现
//将被交换方法的实现替换到这个并不存在的实现
class_replaceMethod(self, mySel, method_getImplementation(systemMethod), method_getTypeEncoding(systemMethod));
}else{
//否则，交换两个方法的实现
method_exchangeImplementations(systemMethod, myMethod);
}
}
- (instancetype)setupInitWithCoder:(NSCoder *)aDecoder {
[self setup];
return [self setupInitWithCoder:aDecoder];
}
- (instancetype)setupInitWithFrame:(CGRect)frame {
[self setup];
return [self setupInitWithFrame:frame];
}
- (void)setup {
self.heightToKeyboard = 10;
self.canMove = YES;
self.keyboardY = 0;
self.totalHeight = 0;
self.tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapAction)];
}
- (void)showAction:(NSNotification *)sender {
if (!self.canMove) {
return;
}
self.keyboardY = [sender.userInfo[UIKeyboardFrameEndUserInfoKey] CGRectValue].origin.y;
self.keyboardHeight = [sender.userInfo[UIKeyboardFrameEndUserInfoKey] CGRectValue].size.height;
[self keyboardDidShow];
}
- (void)hideAction:(NSNotification *)sender {
if (!self.canMove || self.keyboardY == 0) {
return;
}
[self hideKeyBoard:0.25];
}
- (void)keyboardDidShow {
if (self.keyboardHeight == 0) {
return;
}
CGFloat fieldYInWindow = [self convertPoint:self.bounds.origin toView:[UIApplication sharedApplication].keyWindow].y;
CGFloat height = (fieldYInWindow + self.heightToKeyboard + self.frame.size.height) - self.keyboardY;
CGFloat moveHeight = height > 0 ? height : 0;
[UIView animateWithDuration:0.25 animations:^{
if (self.hasContentOffset) {
UIScrollView *scrollView = (UIScrollView *)self.moveView;
scrollView.contentOffset = CGPointMake(scrollView.contentOffset.x, scrollView.contentOffset.y + moveHeight);
} else {
CGRect rect = self.moveView.frame;
self.initialY = rect.origin.y;
rect.origin.y -= moveHeight;
self.moveView.frame = rect;
}
self.totalHeight += moveHeight;
}];
}
- (void)hideKeyBoard:(CGFloat)duration {
[UIView animateWithDuration:duration animations:^{
if (self.hasContentOffset) {
UIScrollView *scrollView = (UIScrollView *)self.moveView;
scrollView.contentOffset = CGPointMake(scrollView.contentOffset.x, scrollView.contentOffset.y - self.totalHeight);
} else {
CGRect rect = self.moveView.frame;
rect.origin.y += self.totalHeight;
self.moveView.frame = rect;
}
self.totalHeight = 0;
}];
}
- (BOOL)newBecomeFirstResponder {
if (self.moveView == nil) {
self.moveView = [self viewController].view;
}
if (![self.moveView.gestureRecognizers containsObject:self.tapGesture]) {
[self.moveView addGestureRecognizer:self.tapGesture];
}
if ([self isFirstResponder] || !self.canMove) {
return [self newBecomeFirstResponder];
}
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(showAction:) name:UIKeyboardWillShowNotification object:nil];
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(hideAction:) name:UIKeyboardWillHideNotification object:nil];
return [self newBecomeFirstResponder];
}
- (BOOL)newResignFirstResponder {
if ([self.moveView.gestureRecognizers containsObject:self.tapGesture]) {
[self.moveView removeGestureRecognizer:self.tapGesture];
}
if (!self.canMove) {
return [self newResignFirstResponder];
}
BOOL result = [self newResignFirstResponder];
[[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillShowNotification object:nil];
[[NSNotificationCenter defaultCenter] removeObserver:self name:UIKeyboardWillHideNotification object:nil];
[self hideKeyBoard:0];
return result;
}
- (void)tapAction {
[[self viewController].view endEditing:YES];
}
- (UIViewController *)viewController {
UIView *next = self;
while (1) {
UIResponder *nextResponder = [next nextResponder];
if ([nextResponder isKindOfClass:[UIViewController class]]) {
return (UIViewController *)nextResponder;
}
next = next.superview;
}
return nil;
}
- (void)setCanMove:(BOOL)canMove {
objc_setAssociatedObject(self, &canMoveKey, @(canMove), OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}
- (BOOL)canMove {
return [objc_getAssociatedObject(self, &canMoveKey) boolValue];
}
- (void)setHeightToKeyboard:(CGFloat)heightToKeyboard {
objc_setAssociatedObject(self, &heightToKeyboardKey, @(heightToKeyboard), OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}
- (CGFloat)heightToKeyboard {
return [objc_getAssociatedObject(self, &heightToKeyboardKey) floatValue];
}
- (void)setMoveView:(UIView *)moveView {
self.hasContentOffset = NO;
if ([moveView isKindOfClass:[UIScrollView class]]) {
self.hasContentOffset = YES;
}
objc_setAssociatedObject(self, &moveViewKey, moveView, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}
- (UIView *)moveView {
return objc_getAssociatedObject(self, &moveViewKey);
}
- (void)setInitialY:(CGFloat)initialY {
objc_setAssociatedObject(self, &initialYKey, @(initialY), OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}
- (CGFloat)initialY {
return [objc_getAssociatedObject(self, &initialYKey) floatValue];
}
- (void)setTapGesture:(UITapGestureRecognizer *)tapGesture {
objc_setAssociatedObject(self, &tapGestureKey, tapGesture, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}
- (UITapGestureRecognizer *)tapGesture {
return objc_getAssociatedObject(self, &tapGestureKey);
}
- (void)setKeyboardY:(CGFloat)keyboardY {
objc_setAssociatedObject(self, &keyboardYKey, @(keyboardY), OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}
- (CGFloat)keyboardY {
return [objc_getAssociatedObject(self, &keyboardYKey) floatValue];
}
- (void)setTotalHeight:(CGFloat)totalHeight {
objc_setAssociatedObject(self, &totalHeightKey, @(totalHeight), OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}
- (CGFloat)totalHeight {
return [objc_getAssociatedObject(self, &totalHeightKey) floatValue];
}
- (void)setKeyboardHeight:(CGFloat)keyboardHeight {
objc_setAssociatedObject(self, &keyboardHeightKey, @(keyboardHeight), OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}
- (CGFloat)keyboardHeight {
return [objc_getAssociatedObject(self, &keyboardHeightKey) floatValue];
}
- (void)setHasContentOffset:(BOOL)hasContentOffset {
objc_setAssociatedObject(self, &hasContentOffsetKey, @(hasContentOffset), OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}
- (BOOL)hasContentOffset {
return [objc_getAssociatedObject(self, &hasContentOffsetKey) boolValue];
}
@end
标签：int property super nta 返回值 set use else tty
原文地址：http://www.cnblogs.com/LkBolg/p/7567506.html
