小功能分享
删除多余cell
- (void)setExtraCellLineHidden: (UITableView *)tableView {
UIView *view = [[UIView alloc]init];
view.backgroundColor = [UIColor clearColor];
[tableView setTableFooterView:view];
[view release];
}
一键换肤
[[UITabBar appearance] setTintColor:_array[indexPath.item]];
[[UINavigationBar appearance]setBarTintColor:_array[indexPath.item]];
[[UITabBar appearance] setBackgroundColor:_array[indexPath.item]];
夜间模式
-(void)handleNightSwitch:(UISwitch *)nigetSwitch{
if (nigetSwitch.on) {
self.view.window.alpha = 0.4;
NSLog(@"打开夜间模式");
}else{
self.view.window.alpha = 1.0;
NSLog(@"关闭夜间模式");
}
}
所有界面都能通过
[UIApplication sharedApplication].keyWindow
修剪图片
NSInteger ImgWidth = [model.imgWidth integerValue];
NSInteger ImgHeight = [model.imgHeight integerValue];
[self.imgView sd_setImageWithURL:[NSURL URLWithString:model.img] completed:^(UIImage *image, NSError *error, SDImageCacheType cacheType, NSURL *imageURL) {
CGImageRef cgRef = image.CGImage;
CGImageRef imageRef1 = CGImageCreateWithImageInRect(cgRef, CGRectMake(0, 0, ImgWidth, ImgHeight));
CGImageRef imageRef2 = CGImageCreateWithImageInRect(cgRef, CGRectMake(0, 0, ImgWidth, ImgWidth * 0.6));
if (ImgHeight < ImgWidth * 0.6) {
UIImage *thumbScale = [UIImage imageWithCGImage:imageRef1];
self.imgView.image = thumbScale;
}else{
UIImage *thumbScale = [UIImage imageWithCGImage:imageRef2];
self.imgView.image = thumbScale;
}
}];
搜索文本改变时
- (void)updateSearchResultsForSearchController:(UISearchController *)searchController {
[self.searchData removeAllObjects];
if (searchController.searchBar.text) {
for (int i = 0; i < searchController.searchBar.text.length; i++) {
NSRange range = NSMakeRange(i, 1);
NSString *subString = [searchController.searchBar.text substringWithRange:range];
const char *cString = [subString UTF8String];
//判断输入的是汉字还是字母
if (strlen(cString) == 3) {
NSLog(@"输入的是汉字");
NSPredicate *searchPredicate = [NSPredicate predicateWithFormat:@"self.name CONTAINS %@",searchController.searchBar.text];
self.searchData = [[self.allCitysArr filteredArrayUsingPredicate:searchPredicate] mutableCopy];
} else if (strlen(cString) == 1) {
NSLog(@"输入的是字母");
NSPredicate *searchPredicate = [NSPredicate predicateWithFormat:@"self.pinyin CONTAINS %@",searchController.searchBar.text];
self.searchData = [[self.allCitysArr filteredArrayUsingPredicate:searchPredicate] mutableCopy];
}
}
}
dispatch_async(dispatch_get_main_queue(), ^{
[self.tableView reloadData];
});
}
图片模糊效果
self.groundImage = [[UIImageView alloc]initWithFrame:CGRectMake(0, 0, self.frame.size.width, self.frame.size.height)];
[self addSubview:_groundImage];
UIBlurEffect *blur = [UIBlurEffect effectWithStyle:UIBlurEffectStyleLight];
UIVisualEffectView *effectivew = [[UIVisualEffectView alloc]initWithEffect:blur];
effectivew.frame = CGRectMake(0, 0, self.frame.size.width, self.frame.size.height);
[_groundImage addSubview:effectivew];
sd_setImageWithURL:
completed:^(UIImage *image, NSError *error, SDImageCacheType cacheType, NSURL *imageURL) {}
block里的image就是原始的图片可以用
CGFloat imageWidth = image.size.width;
CGFloat imageHeight = image.size.height;
取到原始宽高
storyboard:
Leading Edges：左对齐
Trailing Edges：右对齐
Top Edges：上对齐
Bottom Edges：下对齐
Horizontal Centers：水平中心对齐
Vertical Centers：竖向中心对齐
Baselines：基线对齐
Horizontal Center in Container：对齐容器中的水平中心
Vertical Center in Container：对齐容器中的竖向中心
屏幕纵横比（Aspect Ratio）: 显示设备中显示图像的横向尺寸与纵向尺寸的比例，最常见的为4:3，目前的高清晰度电视和一些新型显示设备采用了16:9。
//设置文字的下划线
NSString *oldPrice = tryList.price;
if (IOS7) {
NSString *lineString = [NSString stringWithFormat:@"¥%@",oldPrice];
NSUInteger length = [oldPrice length];
NSMutableAttributedString *attri = [[NSMutableAttributedString alloc] initWithString:lineString];
[attri addAttribute:NSStrikethroughStyleAttributeName value:@(NSUnderlinePatternSolid|NSUnderlineStyleSingle) range:NSMakeRange(0,length+1)];//画线
[attri addAttribute:NSStrikethroughColorAttributeName value:[UIColor lightGrayColor] range:NSMakeRange(0, length+1)];
[self.priceLabel setAttributedText:attri];
}
//设置文字上的线
NSUInteger length = [oldPrice length];
NSMutableAttributedString *attri = [[NSMutableAttributedString alloc] initWithString:lineString];
[attri addAttribute:NSStrikethroughStyleAttributeName value:@(NSUnderlinePatternSolid|NSUnderlineStyleSingle) range:NSMakeRange(0,length+1)];
[attri addAttribute:NSStrikethroughColorAttributeName value:[UIColor lightGrayColor] range:NSMakeRange(0, length+1)];//线的颜色
[self.priceLabel setAttributedText:attri];
点击return回收键盘的TextField
- (BOOL)textFieldShouldReturn:(UITextField *)textField {
[textField resignFirstResponder];
return YES;
}
点击空白回收键盘
-(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{
[textField resignFirstResponder];
// self.view endEditing:YES;//回收所有键盘
}
在TableViewController中调用cell
FirstTableViewCell *cell = [self.tableView cellForRowAtIndexPath:[NSIndexPath indexPathForRow:0 inSection:0]];
弹框
UIAlertController *alertController = [UIAlertController alertControllerWithTitle:@"提示" message:@"恭喜注册成功" preferredStyle:UIAlertControllerStyleAlert];
UIAlertAction *action = [UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDefault handler:nil];
[alertController addAction:action];
UIAlertAction *action = [UIAlertAction actionWithTitle:@"确定" style:UIAlertActionStyleDefault handler:nil];
[alertController addAction:action];
[self presentViewController:alertController animated:YES completion:nil];
