iOS开发小问题总结
2016-10-20 本文已影响20人
yuwei66
在开发过程中，我们避免不了一些小问题的出现，现在为了方便之后的查找，将这些小问题进行持续总结更新。那我们开始总结吧。
- 修改导航栏的title颜色
在iOS7.0之前，我们修改的方法是
UIColor * color = [UIColor whiteColor];
NSDictionary * dict=[NSDictionary dictionaryWithObject:color forKey:UITextAttributeTextColor];
self.navigationBar.titleTextAttributes = dict;
在iOS7.0之后，我们修改的方法是
UIColor * color = [UIColor whiteColor];
NSDictionary * dict=[NSDictionary dictionaryWithObject:color forKey:NSForegroundColorAttributeName];
self.navigationBar.titleTextAttributes = dict;
- 调用系统电话方式（推荐）
UIWebView *callWebView = [[UIWebView alloc] init];
NSURL *telURL = [NSURL URLWithString:@"tel:10086"];
[callWebView loadRequest:[NSURLRequest requestWithURL:telURL]];
[self.view addSubview:callWebView];
- 键盘弹起收回监听方法
//监听键盘
//官方定义好的UIKeyboardWillShowNotification 通知名称
[[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(KeyboardWillShow:) name:UIKeyboardWillShowNotification object:nil];
[[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(KeyboardWillHide:) name:UIKeyboardWillHideNotification object:nil];
//两个方法(当键盘弹起、当键盘收回)
-(void)KeyboardWillShow:(NSNotification *)sender;
- (void)KeyboardWillHide:(NSNotification *)sender；
- 调用摄像头或相册
// 打开相机
- (void)openCamera {
// UIImagePickerControllerCameraDeviceRear 后置摄像头
// UIImagePickerControllerCameraDeviceFront 前置摄像头
BOOL isCamera = [UIImagePickerController isCameraDeviceAvailable:UIImagePickerControllerCameraDeviceRear];
if (!isCamera) {
NSLog(@"没有摄像头");
return ;
}
UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];
imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;
imagePicker.delegate = self;
// 编辑模式
imagePicker.allowsEditing = YES;
[self presentViewController:imagePicker animated:YES completion:^{
}];
}
// 打开相册
- (void)openPics {
UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];
imagePicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
imagePicker.delegate = self;
[self presentViewController:imagePicker animated:YES completion:^{
}];
}
// 选中照片
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info{
NSLog(@"%@", info);
UIImageView *imageView = (UIImageView *)[self.view viewWithTag:101];
// UIImagePickerControllerOriginalImage 原始图片
// UIImagePickerControllerEditedImage 编辑后图片
UIImage *image = [info objectForKey:UIImagePickerControllerEditedImage];
imageView.image = image;
[picker dismissViewControllerAnimated:YES completion:NULL];
}
// 取消相册
- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker {
[picker dismissViewControllerAnimated:YES completion:NULL];
}
- 禁止项目横屏
将general里面的Device Orientation里的后三个选项去掉。
- 调整弹出键盘时的界面上移高度。（保证界面效果基本一致，判断屏幕大小来区分设备）
调整代码如下：
//监听键盘
//官方定义好的UIKeyboardWillShowNotification 通知名称
[[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(KeyboardWillShow:) name:UIKeyboardWillShowNotification object:nil];
[[NSNotificationCenter defaultCenter]addObserver:self selector:@selector(KeyboardWillHide:) name:UIKeyboardWillHideNotification object:nil];
- (void)KeyboardWillShow:(NSNotification *)sender {
//4s的屏幕
if (HEIGHT==480) {
if ( login_phoneField.editing==YES) {
CGRect rect = [[sender.userInfo objectForKey:UIKeyboardFrameEndUserInfoKey]CGRectValue];
CGFloat height = rect.size.height;
NSLog(@"%f",height/HEIGHT);
// UIKeyboardAnimationDurationUserInfoKey 获取键盘升起动画时间
//[[sender.userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey]doubleValue]]
//获取动画时间
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:[[sender.userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey]doubleValue]];
self.view.transform = CGAffineTransformMakeTranslation(0, -HEIGHT/6);
[UIView commitAnimations];//开始执行动画
}else if(login_passWordField.editing==YES){
CGRect rect = [[sender.userInfo objectForKey:UIKeyboardFrameEndUserInfoKey]CGRectValue];
CGFloat height = rect.size.height;
NSLog(@"%f",height);
// UIKeyboardAnimationDurationUserInfoKey 获取键盘升起动画时间
//[[sender.userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey]doubleValue]]
//获取动画时间
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:[[sender.userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey]doubleValue]];
self.view.transform = CGAffineTransformMakeTranslation(0, -HEIGHT/6);
[UIView commitAnimations];//开始执行动画
}
}else if (HEIGHT==568){
//5的屏幕
if ( login_phoneField.editing==YES) {
CGRect rect = [[sender.userInfo objectForKey:UIKeyboardFrameEndUserInfoKey]CGRectValue];
CGFloat height = rect.size.height;
NSLog(@"%f",height/HEIGHT);
// UIKeyboardAnimationDurationUserInfoKey 获取键盘升起动画时间
//[[sender.userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey]doubleValue]]
//获取动画时间
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:[[sender.userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey]doubleValue]];
self.view.transform = CGAffineTransformMakeTranslation(0, -HEIGHT/14);
[UIView commitAnimations];//开始执行动画
}else if(login_passWordField.editing==YES){
CGRect rect = [[sender.userInfo objectForKey:UIKeyboardFrameEndUserInfoKey]CGRectValue];
CGFloat height = rect.size.height;
NSLog(@"%f",height);
// UIKeyboardAnimationDurationUserInfoKey 获取键盘升起动画时间
//[[sender.userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey]doubleValue]]
//获取动画时间
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:[[sender.userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey]doubleValue]];
self.view.transform = CGAffineTransformMakeTranslation(0, -HEIGHT/14);
[UIView commitAnimations];//开始执行动画
}
}
}
//重置、复原
- (void)KeyboardWillHide:(NSNotification *)sender{
CGRect rect = [[sender.userInfo objectForKey:UIKeyboardFrameBeginUserInfoKey]CGRectValue];
CGFloat height = rect.size.height;
NSLog(@"%f",height);
[UIView setAnimationDuration:[[sender.userInfo objectForKey:UIKeyboardAnimationDurationUserInfoKey]doubleValue]];
self.view.transform = CGAffineTransformIdentity;//重置状态
[UIView commitAnimations];
// UITextField * textField = (id)[self.view viewWithTag:TextTag];
// textField.frame = CGRectMake(10, SCREEN_H - 45, SCREEN_W-20, 45);
}
