ios loadView使用

1，下面这个例子，既会加载nib（前提是Test1ViewController初始化时加载nib），也会加载自定义的控件。

如果初始化时没有加载nib，如：Test1ViewController *viewController = [[Test1ViewController alloc] init];则只会加载自定义控件。

//
//  Test1ViewController.m
//  TestLoadView
//
//  Created by dongway on 14-7-31.
//  Copyright (c) 2014年 dongway. All rights reserved.
//

#import "Test1ViewController.h"
#include "stdio.h"

@interface Test1ViewController ()

@end

@implementation Test1ViewController

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}

-(void)loadView{
    [super loadView];//初始化self.view，如果关联nib则初始化nib的信息到self.view；如果ViewController初始化时没有关联nib，则初始化一个空白UIView
    UIButton *button = [[UIButton alloc] initWithFrame:CGRectMake(10, 70, 60, 30)];
    button.titleLabel.text = @"jump";
    button.backgroundColor = [UIColor redColor];
    [button addTarget:self action:@selector(jump) forControlEvents:UIControlEventTouchUpInside];
    [self.view addSubview:button];
    printf("loadview\n");
}

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view from its nib.
    printf("test c");
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

-(void)jump{
    [self dismissViewControllerAnimated:YES completion:nil];
}

@end