ios兩視圖間委託（delegate）傳值

ios兩視圖間委託（delegate）傳值

現有兩個視圖（ViewController，ViewController1），從ViewController中帶參數跳轉到ViewController1，在ViewController1選中資料後帶有效資料後退到ViewController中，委託實現上述功能。

項目：點擊下載

一、ViewController主要代碼

// 按鈕點擊事件-(IBAction)clickSearchBtn:(id)sender {        [[[UIApplication sharedApplication] keyWindow] endEditing:YES];        ViewController1 *_viewController = [[[ViewController1 alloc] init] autorelease];    _viewController.delegate = self;    _viewController.transText = self.textField.text;        [self.navigationController pushViewController:_viewController animated:YES];}// ViewController1Delegate 的代理方法-(void)selectData:(NSString*)text{    dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{        [self.listArray removeAllObjects];        for (int i=0; i<5; i++) {            [self.listArray addObject:[NSString stringWithFormat:@"第%d行資料：%@_%d",i+1,text,arc4random_uniform(100)]];        }        dispatch_async(dispatch_get_main_queue(), ^{            [self.dataTableView reloadData];        });    });}

二、ViewController1主要代碼

// ViewController1.h// delegate寫在#import之前，否則可能會Delegate Cannot find protocol declaration@protocol ViewController1Delegate;@protocol ViewController1Delegate @optional-(void)selectData:(NSString*)text;@end// ViewController1.m- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath{        if ([self.delegate respondsToSelector:@selector(selectData:)]) {                //通過委託協議傳值        [self.delegate selectData:[self.listArray objectAtIndex:indexPath.row]];        [self.navigationController popViewControllerAnimated:YES];    }}

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