iOS 擷取整個app在螢幕上的點選坐标

原文位址：https://www.jianshu.com/p/0b439487b4f9

項目中有個需求是想拿到app裡所有在螢幕上的點選坐标

解決方案建立一個子類繼承自

UIApplication

,然後在

sendEvent

方法中擷取并判斷

#import "MRApplication.h"
#include <CommonCrypto/CommonCrypto.h>

@interface MRApplication()

@property(nonatomic,assign) BOOL isMoved;

@end

@implementation MRApplication

- (void)sendEvent:(UIEvent *)event{
    if (event.type==UIEventTypeTouches) {
        UITouch *touch = [event.allTouches anyObject];
        
        if (touch.phase == UITouchPhaseBegan) {
            self.isMoved = NO;
        }
        
        if (touch.phase == UITouchPhaseMoved) {
            self.isMoved = YES;
        }
        
        if (touch.phase == UITouchPhaseEnded) {
            if (!self.isMoved && event.allTouches.count == 1) {
                UITouch *touch = [event.allTouches anyObject];
                CGPoint locationPointWindow = [touch preciseLocationInView:touch.window];
                NSLog(@"TouchLocationWindow:(%.1f,%.1f)",locationPointWindow.x,locationPointWindow.y);
            }
            self.isMoved = NO;
        }
    }
    [super sendEvent:event];
}

@end
           

其實在

touch

對象中已經有了View的資訊,如果想擷取在view中的相對坐标也可以.使用

touch.view

即可

CGPoint locationPointWindow = [touch preciseLocationInView:touch.view];

注意:這個MRApplication需要在

main.m

中引入,然後就可以攔截整個app所有的點選事件了,其中我對滑動和多點觸控做了處理,不加

if

判斷是會拿到滑動和多點觸控時的

UIEvent

的

#import <UIKit/UIKit.h>
#import "AppDelegate.h"
#import "MRApplication.h"

int main(int argc, char * argv[]) {
    @autoreleasepool {
        return UIApplicationMain(argc, argv, NSStringFromClass([MRApplication class]), NSStringFromClass([AppDelegate class]));
    }
}