整理收集一下常用的UI控件的扩展类！
首先是View的扩展：包含：frame、layer、获取控制器
#import
NS_ASSUME_NONNULL_BEGIN
@interface UIView (Utils)
/**
* x
*/
@property (nonatomic,assign) CGFloat x;
/**
* y
*/
@property (nonatomic,assign) CGFloat y;
/**
* centerX 中心点X
*/
@property (nonatomic,assign) CGFloat centerX;
/**
* centerY 中心点Y
*/
@property (nonatomic,assign) CGFloat centerY;
/**
* width 宽度
*/
@property (nonatomic,assign) CGFloat width;
/**
* height 长度
*/
@property (nonatomic,assign) CGFloat height;
/**
* size 大小
*/
@property (nonatomic,assign) CGSize size;
/**
* 添加阴影效果
* color 颜色
* radius 范围
* opacity 透明度
*/
-(void)viewDrawLayerShadowWithColor:(UIColor*)color Radius:(float)radius Opacity:(float) opacity;
/**
* 添加边框
*/
-(void)viewDrawLayerBorderWithColor:(UIColor*)color BorderWidth:(CGFloat)width ;
/**
* 设置圆角
*/
-(void)viewDrawLayerCornerWithRadius:(CGFloat)radius;
#warning -(void)viewDidAppear:(BOOL)animated 之后使用
/**
* 获取当前正在显示的控制器(由于keyWindow的不同可能获取不正确)
*
* @return 正在显示的控制器
*/
+ (UIViewController *)currentViewController;
/**
* 获取当前正在显示的控制器(无论keyWindow是什么)
*
* @return 正在显示的控制器
*/
+ (UIViewController *)getCurrentViewConrtrollerIgnoreWindowLevel;
/**
* 获取当前显示的View的控制器的根控制器
*
* @return 根控制器
*/
+ (UIViewController *)getCurrentRootViewController;
@end
NS_ASSUME_NONNULL_END
.m文件
#import "UIView+Utils.h"
@implementation UIView (Utils)
#pragma mark - 获取父级控制器
- (UIViewController *)parentController {
// 获取响应者
UIResponder *responder = [self nextResponder];
// 递归找到响应者
while (responder) {
if ([responder isKindOfClass:[UIViewController class]]) {
return (UIViewController *)responder;
}
responder = [responder nextResponder];
}
return nil;
}
#pragma mark - 获取当前控制器 - 由于keyWindow的不同可能获取不正确
+ (UIViewController *)currentViewController {
//如果是在AlertView上可能获取的keyWindow不是UIWindow（注意）
UIWindow *keyWindow = [UIApplication sharedApplication].keyWindow;
// 取到第一层时，取到的是UITransitionView，通过这个view拿不到控制器
UIView *firstView = [keyWindow.subviews firstObject];
UIView *secondView = [firstView.subviews firstObject];
UIViewController *vc = secondView.parentController;
if ([vc isKindOfClass:[UITabBarController class]]) {
UITabBarController *tab = (UITabBarController *)vc;
if ([tab.selectedViewController isKindOfClass:[UINavigationController class]]) {
UINavigationController *nav = (UINavigationController *)tab.selectedViewController;
return [nav.viewControllers lastObject];
} else {
return tab.selectedViewController;
}
}else if ([vc isKindOfClass:[UINavigationController class]]) {
UINavigationController *nav = (UINavigationController *)vc;
return [nav.viewControllers lastObject];
} else {
return vc;
}
return nil;
}
#pragma mark - 获取当前显示的控制器
+(UIViewController *)getCurrentViewConrtrollerIgnoreWindowLevel {
// 获取到最顶层window
UIWindow *topWindow = [[UIApplication sharedApplication] keyWindow];
if (topWindow.windowLevel != UIWindowLevelNormal) {
NSArray *windows = [[UIApplication sharedApplication] windows];
for(topWindow in windows){
if (topWindow.windowLevel == UIWindowLevelNormal)
break;
}
}
// 取到第一层时，取到的是UITransitionView，通过这个view拿不到控制器
UIView *firstView = [topWindow.subviews firstObject];
UIView *secondView = [firstView.subviews firstObject];
// 获取其父级控制器
UIViewController *vc = secondView.parentController;
if ([vc isKindOfClass:[UITabBarController class]])
{
UITabBarController *tab = (UITabBarController *)vc;
if ([tab.selectedViewController isKindOfClass:[UINavigationController class]])
{
UINavigationController *nav = (UINavigationController *)tab.selectedViewController;
return [nav.viewControllers lastObject];
} else {
return tab.selectedViewController;
}
}else if ([vc isKindOfClass:[UINavigationController class]]) {
UINavigationController *nav = (UINavigationController *)vc;
return [nav.viewControllers lastObject];
}else {
return vc;
}
return nil;
}
#pragma mark - 获取当前显示的View的控制器的根控制器
+ (UIViewController *)getCurrentRootViewController {
UIViewController *result;
// Try to find the root view controller programmically
//
// Find the top window (that is not an alert view or other window)
UIWindow *topWindow = [[UIApplication sharedApplication] keyWindow];
if (topWindow.windowLevel != UIWindowLevelNormal) {
NSArray *windows = [[UIApplication sharedApplication] windows];
for(topWindow in windows) {
if (topWindow.windowLevel == UIWindowLevelNormal)
break;
}
}
UIView *rootView = [[topWindow subviews] objectAtIndex:0];
id nextResponder = [rootView nextResponder];
if ([nextResponder isKindOfClass:[UIViewController class]]) {
result = nextResponder;
} else if ([topWindow respondsToSelector:@selector(rootViewController)] && topWindow.rootViewController !=nil) {
result = topWindow.rootViewController;
}else {
NSAssert(NO,@"ShareKit: Could not find a root view controller. You can assign one manually by calling [[SHK currentHelper] setRootViewController:YOURROOTVIEWCONTROLLER].");
NSLog(@"未能找到相应的控制器！");
}
return result;
}
#pragma mark - UIView +Layer
/****------> UIView +Layer <------ ****/
-(void)viewDrawLayerShadowWithColor:(UIColor*)color Radius:(float)radius Opacity:(float) opacity
{
self.layer.shadowOpacity = opacity;//阴影透明度
self.layer.shadowColor = color.CGColor;//阴影的颜色
self.layer.shadowRadius = radius;//阴影扩散的范围控制
// 这里可扩展 ： 设置 阴影的方向和范围
self.layer.shadowOffset = CGSizeMake(1,1);//阴影的范围
}
-(void)viewDrawLayerBorderWithColor:(UIColor *)color BorderWidth:(CGFloat)width
{
self.layer.borderColor = color.CGColor;//边框颜色
self.layer.borderWidth = width;//边框宽度
}
-(void)viewDrawLayerCornerWithRadius:(CGFloat)radius
{
self.layer.masksToBounds =YES;
self.layer.cornerRadius = radius;
}
#pragma mark - UIView +Frame
/****------> UIView +Frame <------ ****/
- (void)setX:(CGFloat)x
{
CGRect frame = self.frame;
frame.origin.x = x;
self.frame = frame;
}
- (CGFloat)x
{
return self.frame.origin.x;
}
- (void)setY:(CGFloat)y
{
CGRect frame = self.frame;
frame.origin.y = y;
self.frame = frame;
}
- (CGFloat)y
{
return self.frame.origin.y;
}
- (void)setCenterX:(CGFloat)centerX
{
CGPoint center = self.center;
center.x = centerX;
self.center = center;
}
- (CGFloat)centerX
{
return self.center.x;
}
- (void)setCenterY:(CGFloat)centerY
{
CGPoint center = self.center;
center.y = centerY;
self.center = center;
}
- (CGFloat)centerY
{
return self.center.y;
}
- (void)setWidth:(CGFloat)width
{
CGRect frame = self.frame;
frame.size.width = width;
self.frame = frame;
}
- (CGFloat)width
{
return self.frame.size.width;
}
- (void)setHeight:(CGFloat)height
{
CGRect frame = self.frame;
frame.size.height = height;
self.frame = frame;
}
- (CGFloat)height
{
return self.frame.size.height;
}
- (void)setSize:(CGSize)size
{
// self.width = size.width;
// self.height = size.height;
CGRect frame = self.frame;
frame.size = size;
self.frame = frame;
}
- (CGSize)size
{
return self.frame.size;
}
@end