iOS Tips

tableView reloadData 程序延迟到reloadData结束在操作。

1. 通过layoutIfNeeded方法，强制重绘并等待完成。
[self.tableView reloadData];  
[self.tableView layoutIfNeeded];  
//刷新完成，执行后续需要执行的代码


2.reloadData方法会在主线程执行，通过GCD，使后续操作排队在reloadData后面执行。
[self.tableView reloadData];  
dispatch_async(dispatch_get_main_queue(), ^{  
    //刷新完成，执行后续代码
});

事件冲突

#import "DKTouchTableView.h"
#import "DKSuspendMapView.h"

@implementation DKTouchTableView


- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer *)otherGestureRecognizer {
    
    CGPoint p = [gestureRecognizer locationInView:self.suspendMap.mapView];
    BOOL pointInMapView = [self.suspendMap.mapView pointInside:p withEvent:nil];
    self.scrollEnabled = !pointInMapView;

    return YES;
}  

手势共存

[singleTapGestureRecognizer requireGestureRecognizerToFail:doubleTapGestureRecognizer];

事件穿透

- (UIView *)hitTest:(CGPoint)point withEvent:(UIEvent *)event {


    return [super hitTest:point withEvent:event];
}

runtime强制执行

    SEL editSelector = self.editButtonItem.action;
    IMP editImp = [self methodForSelector:editSelector];
    void (*editFunc)(id, SEL) = (void *)editImp;
    editFunc(self, editSelector);

多个Button点击

[UIButton appearance].isExclusiveTouch = YES;

基类

self.navigationController.navigationBar.translucent = NO;
self.automaticallyAdjustsScrollViewInsets = NO;

cell进入编辑模式

-(void)didTransitionToState:(UITableViewCellStateMask)state

通过Clang将mian.m文件编译为C++

clang -rewrite-objc main.m

还是字符串靠谱

9AB5E23E-026F-47F1-88A3-E18601ED2613.png

使用Xib自定义view的深坑!!!!!

绝对不可以 LBWealthCenterViewController 里面 有一个 LBWealthCenterView的自定义xibView

子视图不响应父视图的手势识别器

/** 让子视图不响应父视图的手势识别器 */
- (BOOL)gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch{
    if (touch.view == self) {
        return YES;
    }
    if ([touch.view isDescendantOfView:self]) {
        return NO;
    }
    return YES;
}

忽略编译器警告

#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wunguarded-availability"

#pragma clang diagnostic pop

build setting => other waring flags