建立subview及加入各種效果

簡單地記錄一下:

#import <QuartzCore/QuartzCore.h> //import必要的class,用於設定效果

UIView *baseView = [[UIView alloc] initWithFrame:CGRectMake(0, 0, 100, 100)]; //建立view
baseView.backgroundColor = [UIColor whiteColor];  //將背景設成白色

baseView.layer.cornerRadius=5; //加入圓角

baseView.layer.borderWidth=1; //設定邊闊

baseView.layer.borderColor=[UIColor colorWithRed:161/255.0 green:47/255.0 blue:47/255.0 alpha:1]; //以rgb來設定邊的顏色 

//陰影

baseView.layer.shadowColor = [[UIColor blackColor] CGColor];
baseView.layer.shadowOffset = CGSizeMake(3.0f, 3.0f);
baseView.layer.shadowOpacity = 0.5f;
baseView.layer.shadowRadius = 10.0f; 

//漸層
CAGradientLayer *gradient = [CAGradientLayer layer];
gradient.frame = baseView.bounds;
gradient.colors = [NSArray arrayWithObjects:(id)[[UIColor whiteColor] CGColor], (id)[[UIColor grayColor] CGColor], nil];
[baseView.layer insertSublayer:gradient atIndex:0];

[self.view addSubview:baseView];  //將baseView加入到場景

[self.view sendSubviewToBack:baseView]; //將baseView的層次推後一層

[self.view bringSubviewToFront:baseView]; //將baseView的層次拉上一層